Cadmium and Tin Magnetic Nanocatalysts Useful for Biodiesel Production

被引:36
作者
Alves, Melquizedeque B. [1 ]
Medeiros, Fernando C. M. [1 ]
Sousa, Marcelo H. [1 ]
Rubim, Joel C. [1 ]
Suarez, Paulo A. Z. [1 ]
机构
[1] Univ Brasilia, Inst Quim, Lab Mat & Combustiveis, BR-70904970 Brasilia, DF, Brazil
关键词
ferrites; biodiesel; hydrolysis; esterification; transesterification; FREE FATTY-ACIDS; SEPARABLE COMPOSITE PHOTOCATALYST; CROSS-COUPLING REACTIONS; CANDIDA-RUGOSA LIPASE; VEGETABLE-OILS; SOYBEAN OIL; HYDROGENATION REACTIONS; CATALYST; NANOPARTICLES; HYDROLYSIS;
D O I
10.5935/0103-5053.20140238
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Nanoparticulas magneticas compostas por oxidos mistos de ferro/cadmio (ICdO) e ferro/estanho (ISnO) foram usadas como catalisadores em reacoes relevantes para diferentes tecnologias de producao de biodiesel. Estes compostos foram ativos para hidrolise e transesterificacao de oleo de soja, bem como para a esterificacao de acidos graxos obtidos a partir do oleo de soja. Na esterificacao mediada por ISnO foram alcancados altos rendimentos, ca. 84%, apos 1 h de reacao a 200 degrees C. O oxido foi recuperado magneticamente e reutilizado quatro vezes sem perda da sua atividade catalitica, enquanto que uma perda significativa foi observada quando ICdO foi usado. ISnO demonstrou tambem atividade para a producao de biodiesel a partir de oleo de macauba, um substrato altamente acido. Magnetic mixed iron/cadmium (ICdO) and iron/tin (ISnO) oxide nanoparticles were used as catalysts in relevant reactions for biodiesel production technologies. These compounds were active for hydrolysis and transesterification of soybean oil as well as esterification of soybean oil fatty acids. In the esterification assisted by ISnO high yields, ca. 84%, were achieved, after 1 h reaction at 200 degrees C. The oxide was magnetically recovered and reused four times without loss in its activity, while a loss of activity was observed for ICdO catalyst. ISnO also demonstrated catalytic activity for macauba oil, a highly acidic substrate.
引用
收藏
页码:2304 / 2313
页数:10
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