Pyrolysis of tropical vegetable oils

Alencar, J. W.; Alves, Péricles Barreto; Craveiro, A. A.

doi:10.1021/jf00120a031

Cited by 167 publications

(112 citation statements)

References 4 publications

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“…The results show that all solids are active for the methanolysis reaction (see entries [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Nonetheless, the most active catalyst using comparable conditions is the Nb 2 O 5 /H 3 PO 4 .…”

Section: Transesterification Resultsmentioning

confidence: 99%

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Synthesis, characterization and use of Nb2O5 based catalysts in producing biofuels by transesterification, esterification and pyrolysis

Brandão¹,

Quirino²,

Mello³

et al. 2009

J. Braz. Chem. Soc.

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2 O have been investigated as catalysts for the transesterification, esterification and pyrolysis of vegetable oils. The compounds were characterized by thermal analysis (DTA-TGA), spectroscopy (DRX, FT-IR and FT-Raman), surface area (BET) and the acidity (Ho) determined by n-butylamine titration using the Hammet´s indicator method. It was observed that after the acid treatment both the surface area and the acidity decreased as compared to the starting Nb 2 O 5 •xH 2 O. The only exception was a higher acidity verified when nitric acid was used. Among the catalyst investigated, the Nb 2 O 5 /H 3 PO 4 presented the highest activity in the alcoholysis of soybean oil with different mono-alcohols (methanol, ethanol, 2-propanol, n-butanol

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Section: Transesterification Resultsmentioning

confidence: 99%

“…For example, it has been reported the production of hydrocarbons from Tung oil in China during the Second World War. 11 Since then, numerous studies about the thermal [12][13][14][15][16][17][18] and catalytic [19][20][21][22][23][24][25][26][27][28][29] pyrolysis of triglycerides and Vol. 20, No.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and use of Nb2O5 based catalysts in producing biofuels by transesterification, esterification and pyrolysis

Brandão¹,

Quirino²,

Mello³

et al. 2009

J. Braz. Chem. Soc.

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“…These studies will be presented later in some detail in this review that will successively examine studies on the pyrolysis of vegetable oils, on the thermocatalytic cracking of refined oils either pure or hydrogenated and on hydrocracking. It is important to state that in parallel to preceding studies, researchers at the Universidade Federal do Ceará (UFC, Ceará State, Brazil), besides their work on transesterification, were also working on the pyrolysis of triglycerides, 19 and that some pilot units for the pyrolysis were developed at Centro de Pesquisas e Desenvolvimento (CEPED, Bahia State, Brazil) and Instituto Nacional de Tecnologia (INT, Rio de Janeiro State, Brazil).…”

Section: The First Steps In Brazilmentioning

confidence: 99%

“…Applied to the case of vegetable oils and fats, pyrolysis produces materials resulting from simple cracking and from possible thermal reforming of the primary products to various secondary products, depending on the severity of the experimental conditions. Alencar et al 19 studied the pyrolysis of babassu (Orbignya martiana), piqui (Caryocar coriaceum) and palm (Elaeis guineensis) oils between 300 and 500 °C, and that of oleic acid, one of the major moieties of the preceding feeds. Liquid yields of the order of 60 to 80% in volumes were obtained.…”

Section: Pyrolysismentioning

confidence: 99%

Cracking and hydrocracking of triglycerides for renewable liquid fuels: alternative processes to transesterification

Fréty¹,

Rocha²,

Brandão³

et al. 2011

J. Braz. Chem. Soc.

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Os processos industriais mais utilizados na produção de combustíveis líquidos semelhantes ao diesel usam catalisadores homogêneos básicos através das metanólise e etanólise de óleos tais como os de soja, canola, palma entre outros. Desse modo, se obtém o biodiesel. Por sua vez, transformações termo-catalíticas usando as facilidades existentes nas refinarias de petróleo são alternativas que merecem atenção devido a sua viabilidade econômica. De fato, três processos industriais já estão em funcionamento e novos projetos estão em fase final para comercialização. O presente trabalho analisa os experimentos já realizados por pesquisadores brasileiros nas áreas do craqueamento, do craqueamento catalítico e do hidrocraqueamento catalítico dos óleos vegetais puros ou modificados. A partir dos resultados descritos, são sugeridas novas direções destas pesquisas para os próximos anos.The most used industrial processes for the production of liquid fuels like diesel type are based on the methanolysis and ethanolysis of various oil reactants, such as palm, soybean and rapeseed oils, in the presence of homogeneous base catalysts. However, thermal and catalytic transformations of vegetable oils using available reactors and industrial processes are possible alternatives and deserve attention. In fact, three industrial processes are operating and new projects are announced. The present work analyses the experimental studies performed up to now by Brazilian researchers in the field of cracking, catalytic cracking and hydrocracking of pure or modified vegetable oils. From the published results, some research areas for the near future are suggested.

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“…(Shahid & Jamal, 2008;Holanda, 2004). As principais rotas de obtenção dos biocombustíveis a partir destes óleos são a transesterificação e o craqueamento (Demirbas, 2008;Meher et al, 2006;Gerpen, 2005, Alencar et al, 1983.…”

Section: Introductionunclassified

Caracterização físico-química das misturas binárias de biodiesel e diesel comercializados no Amazonas

et al. 2009

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RESUMOO uso de energias renováveis aliadas à preservação do meio ambiente tem despertado interesse cada vez maior em nível nacional e internacional principalmente a utilização do biodiesel em substituição ao diesel de petróleo. Sua utilização traz uma série de vantagens sociais, econômicas e ambientais. Nos últimos anos, houve no Brasil um aumento nas pesquisas sobre o biodiesel. A lei brasileira nº 11.097 de 2005 dispõe sobre a introdução do biodiesel na matriz energética brasileira, misturado ao óleo diesel em um percentual mínimo obrigatório de 2%, com aumento na adição para 5% até 2012. Contudo, essa adição só é possível se o biodiesel estiver dentro dos padrões de qualidade exigidos. Diante disto, neste trabalho foram preparadas misturas de biodiesel adicionado ao diesel interior, nas proporções 2, 5, 10 e 20% (v/v), sendo posteriormente caracterizados a partir da determinação dos parâmetros físico-químicos citados na Resolução da Agência Nacional do Petróleo, Gás Natural e Biocombustíveis (ANP), visando avaliar se as misturas estão em conformidade com a norma. De acordo com os resultados concluiu-se que, tanto o biodiesel quanto suas misturas binárias (B2 a B20) encontram-se dentro dos padrões de qualidade estabelecido pela ANP. PALAVRAS-CHAVE:Biodiesel, Óleo diesel, Parâmetros físico-químicos. Physical chemical characterization of binary mixtures of biodiesel and diesel commercialized in Amazonas ABSTRACTThe use of renewable energies allied to the preservation of the environment has awakening more and more interest on the national and international level, especially the utilization of biodiesel in substitution of petroleum diesel. Its use brings a series of social, economical and environmental advantages. In the last few years, there has been an increase in biodiesel research in Brazil. The Brasilian law no. 11.097 of 2005 proposes the introduction of biodiesel in the Brazilian energetic matrix, mixing it with diesel oil at an obligatory percentile minimum of 2%, with an increase of 5% in the addition, until 2012. However, the addition is only permitted if the biodiesel is within the quality patterns demanded. Before this, mixtures of biodiesel added to interior diesel were prepared, in proportions of 2, 5, 10 and 20% (v/v), which were later characterized, as of the physical chemical parameters determined in the Agência Nacional do Petróleo, Gás Natural e Biocombustíveis (ANP) Resolution for evaluating mixtures in accordance with the norm. The results show that, biodiesel as well as their binary mixtures (B2 to B20) are within the quality patterns established by the ANP.

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Pyrolysis of tropical vegetable oils

Cited by 167 publications

References 4 publications

Synthesis, characterization and use of Nb2O5 based catalysts in producing biofuels by transesterification, esterification and pyrolysis

Synthesis, characterization and use of Nb2O5 based catalysts in producing biofuels by transesterification, esterification and pyrolysis

Cracking and hydrocracking of triglycerides for renewable liquid fuels: alternative processes to transesterification

Caracterização físico-química das misturas binárias de biodiesel e diesel comercializados no Amazonas

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