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Geophysical investigation using resistivity and GPR methods: a case study of a lubricant oil waste disposal area in the city of Ribeiro Preto, So Paulo, Brazil

LAGO, Alexandre Lisboa; ELIS, Vagner Roberto; BORGES, Welitom Rodrigues; PENNER, Giovanni Chaves
Fonte: SPRINGER Publicador: SPRINGER
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
38.1573%
Geophysics has been shown to be effective in identifying areas contaminated by waste disposal, contributing to the greater efficiency of soundings programs and the installation of monitoring wells. In the study area, four trenches were constructed with a total volume of about 25,000 m(3). They were almost totally filled with re-refined lubricating oil waste for approximately 25 years. No protection liners were used in the bottoms and laterals of the disposal trenches. The purpose of this work is to evaluate the potential of the resistivity and ground penetrating radar (GPR) methods in characterizing the contamination of this lubricant oil waste disposal area in Ribeiro Preto, SP, situated on the geological domain of the basalt spills of the Serra Geral Formation and the sandstones of the Botucatu Formation. Geophysical results were shown in 2D profiles. The geophysical methods used enabled the identification of geophysical anomalies, which characterized the contamination produced by the trenches filled with lubricant oil waste. Conductive anomalies (smaller than 185 Omega m) immediately below the trenches suggest the action of bacteria in the hydrocarbons, as has been observed in several sites contaminated by hydrocarbons in previously reported cases in the literature. It was also possible to define the geometry of the trenches...

Estudo do potencial de uso do resíduo efluente gerado da destilação do óleo de folhas de eucalipto (Corymbia citriodora (Hook) Pryor e Johnson 1976), como corante natural para o tingimento têxtil de algodão; Study of the potential of using waste effluent from the distillation of the leaf oil of eucalyptus (Corymbia citriodora (Hook) Pryor and Johnson 1976), as a natural dyestuff for dyeing cotton fabrics

Rossi, Ticiane
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 23/02/2010 PT
Relevância na Pesquisa
38.115825%
Atualmente, os corantes naturais vêm ganhando maior interesse da sociedade, fazendo crescer um novo nicho de mercado, que valoriza produtos obtidos de matériasprimas naturais, devido aos menores danos causados à saúde humana e ao meio ambiente. Uma fonte potencial para obtenção de corantes encontra-se na operação industrial da obtenção de óleo essencial de folhas de eucalipto. Trata-se de um resíduo líquido gerado na etapa de destilação das folhas, mediante o emprego de vapor d´água. Um grande volume de extrato é gerado e descartado como efluente do processo. O Brasil é um dos principais produtores mundiais de óleo de folhas de eucalipto, sobretudo de Corymbia citriodora (ex Eucalyptus citriodora), havendo, desse modo, importante potencial de exploração do efluente gerado na destilação das folhas como matéria-prima. Contando com o apoio de uma empresa do setor de produção desse óleo, pretendeu-se avaliar o potencial desse extrato como corante natural, visando o tingimento de tecidos de algodão. Para caracterização do resíduo efluente e do corante natural dele obtido, foram realizadas avaliações físicas e químicas, tais como: teor de sólidos, pH, densidade, teor de taninos condensados e medição de cor mediante análises espectrofotométricas. Na avaliação do potencial do resíduo efluente como corante natural...

Caracterização de resíduos de caixas de gordura e avaliação da flotação como alternativa para o pré-tratamento; Grease trap waste characterization and evaluation of flotation as an alternative for pre-treatment

Gasperi, Renata de Lima Pereira de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 19/10/2012 PT
Relevância na Pesquisa
48.115825%
Caixas de gordura são dispositivos para retenção de material gorduroso, de origem animal e vegetal, proveniente de pias de cozinha. Sua instalação é exigida por muitos municípios para liberação de ligações de esgoto, visando reduzir as concentrações de óleos e graxas (OG) lançadas no sistema público de coleta e tratamento. Um fator primordial para que estas caixas cumpram suas funções é o estabelecimento de rotinas de manutenção envolvendo inspeção e limpeza periódica. A instalação de locais para recebimento e pré-tratamento dos resíduos retirados das caixas de gordura pode incentivar boas práticas de operação e manutenção destes dispositivos. Diante disso, os objetivos desta pesquisa contemplam a caracterização de resíduos acumulados em caixas de gordura e a avaliação da flotação como alternativa para o seu pré- tratamento, seguido de caracterização do óleo extraído da escuma produzida no flotador. Para tanto, materiais acumulados em caixas de gorduras de fontes distintas foram caracterizados, possibilitando observar grande variação em sua composição, e elevadas concentrações de DBO, DQO, SST e OG. Para verificar o desempenho da flotação visando à redução de OG no efluente pré-tratado...

Produção de biodiesel a partir de óleo residual reciclado e realização de testes comparativos com outros tipos de biodiesel e proporções de mistura em um moto-gerador

Dib, Fernando Henrique
Fonte: Universidade Estadual Paulista (UNESP) Publicador: Universidade Estadual Paulista (UNESP)
Tipo: Dissertação de Mestrado Formato: 114 f. : il., fots.(algumas color.)
POR
Relevância na Pesquisa
38.103342%
Pós-graduação em Engenharia Mecânica - FEIS; Neste trabalho são analisadas técnicas de produção do biodiesel a partir do óleo residual reciclado, visando a diversificação da matriz energética brasileira e minimização dos impactos ambientas decorrentes do descarte inadequado desses óleos. Antes do início da produção de biodiesel é necessária a realização de um pré-tratamento deste óleo, o que envolve processos de filtragem, secagem e determinação do teor de acidez, seguida de neutralização, pois de acordo com a porcentagem de ácidos graxos livres presentes na matéria-prima é que os métodos para obtenção dos ésteres são adotados. Primeiramente, foram realizados testes laboratoriais em pequena escala para produção de biodiesel, utilizando como matérias prima o óleo residual reciclado e o óleo de soja degomado para efeito comparativo, tendo sido utilizado hidróxido de sódio como catalisador e experimentadas as rotas metílica e etílica, não tendo sido obtidos resultados satisfatórios neste último caso. Em seguida, a produção foi expandida para uma escala semi-piloto, através da utilização de um reator com capacidade de produzir entre 75 e 80 litros de biodiesel por batelada, sendo neste caso utilizado apenas óleo residual reciclado e processo de transesterificação através da rota metílica...

Produção de esteres etilicos (biodiesel) a partir da transesterização basica de oleo residual; Productions of ethyl esters (biodesel) from the transesterification core residual oil

Danilo Ribeiro de Lima
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 08/09/2008 PT
Relevância na Pesquisa
58.33306%
Biodiesel (ésteres alquílicos) é um combustível limpo derivado de fontes renováveis como óleo vegetal e gordura animal. O biodiesel é biodegradável, possui elevado ponto de fulgor, não-tóxico e produz menos COx e resíduos aromáticos do que o diesel de petróleo. Atualmente, devido ao elevado preço do óleo de soja e de canola, a produção de biodiesel a partir de matérias-primas de baixo custo como óleo residual pode aumentar a competitividade econômica do biodiesel frente ao diesel de petróleo, além de ser uma maneira de reciclar resíduos. A etanólise do óleo residual coletado em restaurante comercial foi estudada utilizando os catalisadores hidróxido de sódio e de potássio. Com teor de acidez superior a 3,8%, a transesterificação do óleo residual apresentou problemas comuns a esse tipo de matéria-prima, como formação de sabão e dificuldade de separação de fases. Assim, os planejamentos experimentais foram realizados em condições específicas de modo a resolver estes problemas. O óleo residual foi caracterizado pelo teor de acidez, umidade, composição de ácidos graxos, índice de iodo, viscosidade cinemática e massa específica. Primeiramente, foi realizado um planejamento fatorial fracionário para determinação das variáveis (temperatura...

Desenvolvimento de betumes inovadores modificados com resíduos; Development of innovative modified bitumens with waste materials

Fernandes, Sara Raquel Marques
Fonte: Universidade do Minho Publicador: Universidade do Minho
Tipo: Trabalho de Conclusão de Curso
Publicado em //2013 POR
Relevância na Pesquisa
38.141492%
Dissertação de mestrado integrado em Engenharia Civil (área de especialização em Perfil de Planeamento e Infraestruturas de Transporta); Atualmente é crescente a preocupação em minimizar/conservar os recursos naturais utilizados na pavimentação rodoviária, bem como a valorização de resíduos. Como tal, vários estudos têm surgido onde estes temas são abordados. Partindo deste pressuposto, o estudo de novos ligantes asfálticos, em que a quantidade de betume é reduzida pela sua substituição por resíduos, torna-se essencial para o desenvolvimento sustentável da indústria rodoviária. O principal objetivo deste trabalho consiste no desenvolvimento de um ligante betuminoso alternativo com um desempenho competitivo, ou seja, deverá possuir propriedades semelhantes ou superiores às de um betume convencional. Assim pretende-se estudar a adição de óleo de motor usado e de diferentes polímeros (um plastómero e um elastómero) num betume convencional, de forma a obter um ligante proveniente, em parte de resíduos, e ao mesmo tempo, diminuir a quantidade de betume utilizado nas misturas betuminosas. Os betumes modificados foram produzidos com diferentes percentagens de cada modificador e avaliados através de vários ensaios de caracterização...

Upgrade of Biofuels Obtained from Waste Fish Oil Pyrolysis by Reactive Distillation

Wisniewski Jr,Alberto; Wosniak,Lorena; Scharf,Dilamara R.; Wiggers,Vinicyus R.; Meier,Henry F.; Simionatto,Edesio L.
Fonte: Sociedade Brasileira de Química Publicador: Sociedade Brasileira de Química
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/02/2015 EN
Relevância na Pesquisa
38.150322%
Bio-oil is classified as second-generation biofuel and it is produced mainly through the pyrolysis of a waste lignocellulosic biomass base. The application of this product is still very limited, due to some of its chemical characteristics. This paper presents a proposal for the reduction of the acidity of bio-oil obtained from waste fish oil, previously produced and characterized as described in the literature, applying the reactive distillation process. This process is primarily based on the conversion of carboxylic acids into their corresponding esters by adding a widely available alcohol and a simple and cheap catalyst in the process for the fractional distillation of crude bio-oil to obtain light and heavy bio-oil, that is, fractions which are equivalent to the fossil fuels gasoline and diesel, respectively. The alcohols tested were methanol and ethanol and the catalysts were H2SO4, H3PO4, NaOH and Na2CO3, in proportions of 10 and 0.5 wt.%, respectively. The light bio-oil was obtained within a temperature range of 42 to 198 ºC with yields of 27.0 to 43.1% and the heavy bio-oil was recovered at 93 to 230 ºC with yields of 42.6 to 49.2%. The greatest acidity reduction was observed employing methanol+H2SO4 (95% and 43% for light and heavy bio-oils...

Oxidative stability of biodiesel from soybean oil fatty acid ethyl esters

Ferrari,Roseli Ap.; Oliveira,Vanessa da Silva; Scabio,Ardalla
Fonte: São Paulo - Escola Superior de Agricultura "Luiz de Queiroz" Publicador: São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2005 EN
Relevância na Pesquisa
38.24463%
Biodiesel consists of long-chain fatty acid esters, derived from renewable sources such as vegetable oils, and its utilization is associated to the substitution of the diesel oil in engines. Depending on the raw material, biodiesel can contain more or less unsaturated fatty acids in its composition, which are susceptible to oxidation reactions accelerated by exposition to oxygen and high temperatures, being able to change into polymerized compounds. The objective of this work was to determine the oxidative stability of biodiesel produced by ethanolysis of neutralized, refined, soybean frying oil waste, and partially hydrogenated soybean frying oil waste. The evaluation was conducted by means of the Rancimat® equipment, at temperatures of 100 and 105ºC, with an air flow of 20 L h-1. The fatty acid composition was determined by GC and the iodine value was calculated. It was observed that even though the neutralized, refined and waste frying soybean oils presented close comparable iodine values, biodiesel presented different oxidative stabilities. The biodiesel from neutralized soybean oil presented greater stability, followed by the refined and the frying waste. Due to the natural antioxidants in its composition, the neutralized soybean oil promoted a larger oxidative stability of the produced biodiesel. During the deodorization process...

Production of surfactin by bacillus subtilis mtcc 2423 from waste frying oils

Vedaraman,N.; Venkatesh,N.
Fonte: Brazilian Society of Chemical Engineering Publicador: Brazilian Society of Chemical Engineering
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2011 EN
Relevância na Pesquisa
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One of the obstacles in the way of wide scale industrial application of biosurfactants is the high production cost coupled with a low production rate. In order to lower the production cost surfactin production by Bacillus subtilis MTCC 2423 was studied in submerged batch cultivation using waste frying oils. It was observed that the decrease in surface tension was 56.32%, 48.5% and 46.1% with glucose, waste frying sunflower oil and waste frying rice bran oil, respectively. Biomass formation was 4.36 g/L, 3.67 g/L and 4.67 g/L for glucose, waste frying sunflower oil and waste frying rice bran oil, respectively. Product yield (g product/g substrate) was 2.1%, 1.49% and 1.1% with glucose, waste frying sunflower oil and waste frying rice bran oil as substrates. This process facilitates safe disposal of waste frying oil, as well reducing the production cost of surfactin.

Angiosarcoma, porphyria cutanea tarda, and probable chloracne in a worker exposed to waste oil contaminated with 2,3,7,8-tetrachlorodibenzo-p-dioxin.

McConnell, R; Anderson, K; Russell, W; Anderson, K E; Clapp, R; Silbergeld, E K; Landrigan, P J
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /08/1993 EN
Relevância na Pesquisa
47.367974%
A worker developed angiosarcoma, porphyria cutanea tarda, and skin lesions characteristic of mild chloracne. About 10 years earlier he had been employed at a truck terminal in Saint Louis, Missouri, at a time when it was sprayed with waste oil contaminated with 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). The occurrence of these three rare conditions in a single exposed worker supports the aetiological relation between environmental exposure to TCDD and the subsequent development of soft tissue sarcoma and porphyria cutanea tarda.

Synthesis and Performance Evaluation of a New Deoiling Agent for Treatment of Waste Oil-Based Drilling Fluids

Liu, Pingting; Huang, Zhiyu; Deng, Hao; Wang, Rongsha; Xie, Shuixiang
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
48.33306%
Oil-based drilling fluid is used more and more in the field of oil and gas exploration. However, because of unrecyclable treating agent and hard treatment conditions, the traditional treating technologies of waste oil-based drilling fluid have some defects, such as waste of resource, bulky equipment, complex treatment processes, and low oil recovery rate. In this work, switchable deoiling agent (SDA), as a novel surfactant for treatment of waste oil-based drilling fluid, was synthesized by amine, formic acid, and formaldehyde solution. With this agent, the waste oil-based drilling fluid can be treated without complex process and expensive equipment. Furthermore, the agent used in the treatment can be recycled, which reduces waste of resource and energy. The switch performance, deoiling performance, structural characterization, and mechanisms of action are studied. The experimental results show that the oil content of the recycled oil is higher than 96% and more than 93% oil in waste oil-based drilling fluid can be recycled. The oil content of the solid residues of deoiling is less than 3%.

Biodegradation of waste lubricants by a newly isolated Ochrobactrum sp. C1

Bhattacharya, Munna; Biswas, Dipa; Sana, Santanu; Datta, Sriparna
Fonte: Springer Berlin Heidelberg Publicador: Springer Berlin Heidelberg
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
38.40045%
A potential degrader of paraffinic and aromatic hydrocarbons was isolated from oil-contaminated soil from steel plant effluent area in Burnpur, India. The strain was investigated for degradation of waste lubricants (waste engine oil and waste transformer oil) that often contain EPA (Environmental Protection Agency, USA) classified priority pollutants and was identified as Ochrobactrum sp. C1 by 16S rRNA gene sequencing. The strain C1 was found to tolerate unusually high waste lubricant concentration along with emulsification capability of the culture broth, and its degradation efficiency was 48.5 ± 0.5 % for waste engine oil and 30.47 ± 0.25 % for waste transformer oil during 7 days incubation period. In order to get optimal degradation efficiency, a three level Box–Behnken design was employed to optimize the physical parameters namely pH, temperature and waste oil concentration. The results indicate that at temperature 36.4 °C, pH 7.3 and with 4.6 % (v/v) oil concentration, the percentage degradation of waste engine oil will be 57 % within 7 days. At this optimized condition, the experimental values (56.7 ± 0.25 %) are in a good agreement with the predicted values with a calculated R2 to be 0.998 and significant correlation between biodegradation and emulsification activity (E24 = 69.42 ± 0.32 %) of the culture broth toward engine oil was found with a correlation coefficient of 0.972. This is the first study showing that an Ochrobactrum sp. strain is capable of degrading waste lubricants...

Degradacao termica e catalitica da borra oleosa de Petroleo com materiais nanoestruturados al-mcm-41 e AL-SBA-15

Paulino, Ana Adalgisa Dias
Fonte: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Ciência e Engenharia do Petróleo; Pesquisa e Desenvolvimento em Ciência e Engenharia de Petróleo Publicador: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Ciência e Engenharia do Petróleo; Pesquisa e Desenvolvimento em Ciência e Engenharia de Petróleo
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
47.775337%
Aiming to reduce and reuse waste oil from oily sludge generated in large volumes by the oil industry, types of nanostructured materials Al-MCM-41 and Al-SBA-15, with ratios of Si / Al = 50, were synthesized , and calcined solids used as catalysts in the degradation of oily sludge thermocatalytic oil from oilfield Canto do Amaro, in the state of Rio Grande do Norte. Samples of nanostructured materials were characterized by thermogravimetric analysis (TG / DTG), X-ray diffraction (XRD), scanning electron microscopy (SEM), absorption spectroscopy in the infrared Fourier transform (FT-IR) and adsorption nitrogen (BET). The characterization showed that the synthesized materials resulted in a catalyst nanostructure, and ordered pore diameter and surface area according to existing literature. The oily sludge sample was characterized by determining the API gravity and sulfur content and SARA analysis (saturates, aromatics, resins and asphaltenes). The results showed a material equivalent to the average oil with API gravity of 26.1, a low sulfur content and considerable amount of resins and asphaltenes, presented above in the literature. The thermal and catalytic degradation of the oily sludge oil was performed from room temperature to 870 ° C in the ratios of heating of 5...

Sustainable Decommissioning of Oil Fields and Mines

Environmental Resources Management
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Publications & Research; Publications & Research :: Working Paper
ENGLISH; EN_US
Relevância na Pesquisa
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The overall goal of the decommissioning of oil fields and mines initiative (the 'Initiative') is, in keeping with World Bank policy, to promote sustainable development by assisting governments to undertake and engage in earlier and more systematic, comprehensive, and responsive planning of the decommissioning and closure of mining and oil and gas production operations, as well as more effective implementation. The target audience for this Initiative are the governments of resource-rich countries, specifically the regulatory authorities, institutions, and ministries responsible for: administering mineral resource and oil and gas extraction contracts; issuing environmental permits for exploration, exploitation, and closure; and ensuring that legal, financial and technical measures are in place to address temporary shutdowns as well as complete closure and decommissioning at the end of the productive life of oil and gas and mining operations. This issues paper compiles findings of the first step of the Initiative. It is organized as: section one is an introduction. Section two presents the key trends and challenges faced by both the mining and oil and gas industries in decommissioning operations that have reached the end of their life cycle. Section three organizes findings and issues around what are believed to represent core components of a practical...

Lebanon : Economic Assessment of Environmental Degredation Due to July 2006 Hostilities, Sector Note

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Tipo: Economic & Sector Work :: Other Environmental Study; Economic & Sector Work
ENGLISH; EN_US
Relevância na Pesquisa
38.27899%
The 34-day hostilities in Lebanon started on July 12, 2006 and continued until August 14, 2006, when the ceasefire entered in force. This report provides an order of magnitude estimate of the cost of environmental degradation caused by the July 2006 hostilities in Lebanon. Chapter 1 introduces the study's objectives, assumptions and valuation methods used. Chapter 2 provides an overview and valuation of the oil spill impacts. Chapters 3-7 estimate the impacts of the hostilities on waste, water, quarries, air and forests.

Revisión del manual de manejo de residuos de Lupatech Oil Field Services; Revision of manual handling of waste Oil Field Services Lupatech

López Orozco, Karen Lorena; Ruiz Suarez, Erika J.
Fonte: Universidad Militar Nueva Granada; Facultad de Ingeniería; Especialización en Planeación Ambiental y Manejo Integral de los Recursos Naturales Publicador: Universidad Militar Nueva Granada; Facultad de Ingeniería; Especialización en Planeación Ambiental y Manejo Integral de los Recursos Naturales
Tipo: bachelorThesis; Trabajo de grado Formato: pdf; pdf
SPA
Relevância na Pesquisa
47.786147%
En Lupatech OFS Colombia, la generación de residuos ha venido incrementado durante los dos últimos años, ya que su actividad operacional ha tenido auge en gran parte del país haciendo que entre a competir con empresas de talla internacional. Es por esto que es necesario realizar una revisión del manual de gestión de los residuos ya que el que tiene actualmente no incluye todos los procesos manejados en la compañía como Coiled Tubing, cañoneo y Open Hole. La revisión de este manual hará que se mejoren los métodos de separación, reciclaje, y reutilización de los residuos generados en cada una de las actividades de Lupatech OFS y así mismo demostrar el compromiso ambiental de la empresa; At Lupatech OFS Colombia waste generation has increased in the last two years because their operational activity has been booming in most parts of the country, thus becoming more competitive internationally. For this reason, it is necessary to review the waste management manual for waste generation, as the current manual doesn´t include all of the operating processes in the company like Coiled Tubing, Shotting and Open Holes services.. The review of this manual will improve the separation methods, recycling and reuse of waste generated by each area of Lupatech OFS as well as demonstrate the company´s environmental commitment.

Combustion of waste oils simulating their injection in blast furnace tuyeres.; Combustión de aceites residuales simulando su inyeccion en las toberas del horno alto.

Cores Sánchez, A.; Ferreira-Barragáns, Silvia; Isidro, A.; Muñiz, M.
Fonte: Consejo Superior de Investigaciones Científicas (España) Publicador: Consejo Superior de Investigaciones Científicas (España)
Tipo: Artículo Formato: 3012700 bytes; application/pdf
SPA; ENG
Relevância na Pesquisa
48.01794%
14 pages, 6 figures, 11 tables and 2 appendixes.; [EN]A study has been made of the combustion of different waste oils produced in an iron and steel works. Combustion is achieved by injecting the waste oil at flows of 10-20 kg/h in a combustion chamber that simulates the conditions of the blast furnace tuyere zone. The waste oil is preheated to 65-90 °C in order to achieve conditions of fluidity and is injected by spraying into the combustion chamber. During combustion the temperatures and the CO2, O2, CO N2 and H2 contents of the gases in the combustion chamber are constantly recorded. The efficiency of the combustion of each waste oil is determined.; [ES] Se realiza un estudio de la combustión de diferentes aceites residuales que se producen en las plantas siderúrgicas. La combustión se consigue al inyectar el aceite residual, con caudales de 10-20 kg/h, en una cámara de combustión que simula las condiciones del horno alto en la zona de toberas. El aceite residual se precalienta a 65-90 °C para conseguir las condiciones de fluidez y se inyecta en la cámara de combustión. Durante la combustión, se registran de modo continuo las temperaturas y los contenidos de CO2, O2, CO, N2 y H2 en los gases de la cámara de combustión. Se calcula la eficiencia de la combustión de cada aceite residual.; Peer reviewed

Progress in waste oil to sustainable energy, with emphasis on pyrolysis techniques

Lam, Su Shiung; Liew, Rock Keey; Jusoh, Ahmad; Chong, Cheng Tung; Ani, Farid Nasir; Chase, Howard A.
Fonte: Elsevier Publicador: Elsevier
Tipo: Article; accepted version
EN
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68.358955%
This is the author accepted manuscript. The final version is available from Elsevier via http://dx.doi.org/10.1016/j.rser.2015.09.005; This paper begins with a review on the current techniques used for the treatment and recovery of waste oil, which is then followed by an extensive review of the recent achievements in the sustainable development and utilization of pyrolysis techniques in energy recovery from waste oils. The advantages and limitations shown by the use of pyrolysis technique and other current techniques were discussed along with the future research that can be performed on the pyrolysis of waste oil. It was revealed that the current techniques (transesterification, hydrotreating, gasification, solvent extraction, and membrane technology) are yet to be sustainable or completely feasible for waste oil treatment and recovery. It was established that pyrolysis techniques offer a number of advantages over other existing techniques in recovering both the energetic and chemical value of waste oil by generating potentially useful pyrolysis products suitable for future reuse. In particular, microwave pyrolysis shows a distinct advantage in providing a rapid and energy-efficient heating compared to conventional pyrolysis techniques...

Catalytic microwave pyrolysis of waste engine oil using metallic pyrolysis char

Lam, Su Shiung; Liew, Rock Keey; Cheng, Chin Kui; Chase, Howard A.
Fonte: Elsevier Publicador: Elsevier
Tipo: Article; accepted version
EN
Relevância na Pesquisa
58.398467%
This is the author accepted manuscript. The final version is available from [publisher] via http://dx.doi.org/10.1016/j.apcatb.2015.04.014; Microwave pyrolysis was performed on waste engine oil pre-mixed with different amounts of metallic-char catalyst produced previously from a similar microwave pyrolysis process. The metallic-char catalyst was first prepared by pretreatment with calcination followed by analyses to determine its various properties. The heating characteristics of the mixture of waste oil and metallic-char during the pyrolysis were investigated, and the catalytic influence of the metallic-char on the yield and characteristics of the pyrolysis products are discussed with emphasis on the composition of oil and gaseous products. The metallic-char, detected to have a porous structure and high surface area (124 m2/g), showed high thermal stability in a N2 atmosphere and it was also found to have phases of metals and metal oxides attached or adsorbed onto the char, representing a potentially suitable catalyst to be used in pyrolysis cracking process. The metallic-char initially acted as an adsorptive-support to adsorb metals, metal oxides and waste oil. Then, the char became a microwave absorbent that absorbed microwave energy and heated up to a high temperature in a short time and it was found to generate arcing and sparks during microwave pyrolysis of the waste oil...

Estabilidade oxidativa de biodiesel de ésteres etílicos de ácidos graxos de soja; Oxidative stability of biodiesel from soybean oil fatty acid ethyl esters

Ferrari, Roseli Ap.; Oliveira, Vanessa da Silva; Scabio, Ardalla
Fonte: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz Publicador: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; Formato: application/pdf
Publicado em 01/06/2005 ENG
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Biodiesel consiste em ésteres de ácidos graxos de cadeia longa, proveniente de fontes renováveis como óleos vegetais, e sua utilização está associada à substituição do diesel em motores. Dependendo da matéria-prima, o biodiesel pode conter mais ou menos ácidos graxos insaturados em sua composição, que são suscetíveis a reações de oxidação aceleradas pela exposição ao oxigênio e altas temperaturas, podendo resultar em compostos poliméricos prejudiciais ao motor. O objetivo deste trabalho foi avaliar a estabilidade oxidativa do biodiesel obtido pela etanólise dos óleos de soja neutro, refinado, usado em fritura, e óleo parcialmente hidrogenado usado em fritura. A avaliação foi feita através do equipamento Rancimat®, nas temperaturas de 100 e 105ºC, com fluxo de ar de 20 L h-1. A composição em ácidos graxos foi determinada por CG e o índice de iodo calculado. Embora os óleos de soja neutro, refinado e usado em fritura apresentassem índices de iodo próximos, a estabilidade oxidativa do biodiesel comportou-se de maneira distinta. O biodiesel de óleo neutro apresentou maior estabilidade, seguido pelo refinado e usado em fritura. Por conter antioxidantes naturais em sua composição, o óleo neutro de soja proporcionou uma estabilidade oxidativa maior ao biodiesel produzido. O proveniente de óleo refinado - que pelo processo de desodorização perde parte destes antioxidantes - apresentou menor estabilidade. O processo térmico degrada os antioxidantes...