Buscar

Biofuel via interesterification of rapeseed oil with methyl acetate in presenc of Potassuim T-Butoxide/THF

quinta-feira, setembro 26, 2019

Authors: Valdis Kampars; Zane Abelniece; Ruta Kampare

Abstract: Transesterification does not allow to make full conversion of oil to biodiesel because the by-product glycerol cannot be included in the composition of biofuel. Interesterification constitutes a full conversion process with production of triacetin (TA) instead of glycerol, which can be included in the composition of biofuel and allows to increase its yield. Both interesterification and transesterification effectively occur only in presence of catalysts. Results of the investigation of heterogeneous and homogeneous catalysts indicate the superior importance of catalyst solubility in starting reaction mixture. Partial solubility can remarkably lower the activity of homogeneous catalyst and extremely increase that of formally heterogeneous one. 

The reaction mixture of interesterification reaction is less polar than that of transesterification, and potassium tert-butoxide (t-BuOK) should be more appropriate catalyst for interesterification than sodium methoxide which is used in most cases. The catalytic system t-BuOK/t-BuOH substantially increases the yield of TA and changes the properties of obtained biofuel. Whereas the content of the TA in the interesterification reaction mixture does not achieve the same level from the theoretically predicted as the FAME, the occurrence of side reaction between t-BuOH and TA cannot be excluded. 

This paper presents a study of the interesterification of rapeseed oil in presence of catalytic system t-BuOK/THF (catalytic system without alcohols) with the aim of establishing the influence of aprotic tetrahydrofuran to the proceeding the reaction, composition of reaction mixtures and their fuel properties. Obtained results show that the absence of alcoholic hydroxyl groups in the catalytic system insufficiently increases the activity of catalytic system but fails to increase the yield of FAME.

To read the full article, click here.

Page: EPS

Veja também:

0 comentários

Agradecemos seu comentário! Volte sempre :)

Categorias

Acrocomia aculeata (20) Alimentos (227) animal nutition (1) Aspectos Gerais (177) Aviação (27) Aviation market (13) Biocombustíveis (177) Biodiesel (76) Bioeconomia (15) Bioeletricidade (2) Biofertilizantes (1) Biofuels (88) Biomass (7) Biomassa (54) Biopolímeros (3) Bioquerosene (18) Biotechnology (21) Biotecnologia (2) Brazil (20) Cerrado (3) Ciência e Tecnologia (182) Clima e ambiente (190) climate changed (28) Cogeração de energia (9) COP24 (76) COP25 (16) Cosméticos (20) Crédito de Carbono (30) Cultivo (96) eco-friendly (2) Economia Internacional (62) Economia Verde (159) Economy (25) Ecosystem (1) Efeito estufa (7) Energia (28) Energia Renovável (158) event (6) Eventos (79) Extrativismo (20) Farelos (27) farm (1) Fibras (8) Floresta plantada (64) Food (41) food security (1) forest (1) Fuels (16) Global warming (79) Green Economy (123) health (22) Industry 4.0 (1) IPCC (14) livestock (4) Low-Carbon (40) Lubrificantes e Óleos (20) Macaúba (515) Manejo e Conservação (44) Meio Ambiente (90) Melhoramento e Diversidade Genética (52) Mercado (3846) Mercado florestal (46) Nutrição animal (15) nutrition (9) Oil (44) Oleochemicals (1) Óleos (213) other (1) Paris Agreement (64) Pecuária (62) Pegada de Carbono (42) pirólise (1) Plant Based (7) Política (55) Produtos (149) proteína vegetal (25) Recuperação de área Degradada (25) renewable energy (10) Research and Development (7) SAF (1) Saúde e Bem-Estar (80) science and technology (26) Segurança Alimentar (37) Soil (7) Solos (8) Sustainability (39) Sustainable Energy (53) Sustentabilidade (305) Vídeo (193) World Economy (68)

Total de visualizações de página