Deactivation study of K2O/NaX and Na2O/NaX catalysts for biodiesel production

被引：19

作者：

Galvan Mucino, Gabriel E. ^{[1
]}

Romero, Rubi ^{[1
]}

Garcia-Orozco, Ivan ^{[1
]}

Ramirez Serrano, Armando ^{[2
]}

Baeza Jimenez, Ramiro ^{[1
]}

Natividad, Reyna ^{[1
]}

机构：

[1] Univ Autonoma Estado Mexico, Fac Quim, Ctr Conjunto Invest Quim Sustentable UAEM UNAM, Unidad San Cayetano, Carretera Toluca Atlacomulco Km 14-5, Toluca 50200, Estado De Mexic, Mexico

[2] Univ Autonoma Estado Mexico, Fac Quim, Paseo Colon Esq Paseo Tollocan S-N, Toluca 50200, Estado De Mexic, Mexico

来源：

CATALYSIS TODAY | 2016年 / 271卷

关键词：

Deactivation; Transesterification; Heterogeneous catalysts; K2O/NaX catalyst; Na2O/NaX catalyst; SUPPORTED TIN OXIDES; SUNFLOWER OIL; SOYBEAN OIL; BASIC PROPERTIES; TRANSESTERIFICATION; ZEOLITES;

D O I：

10.1016/j.callod.2015.09.054

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A performance comparison of K2O/NaX and Na2O/NaX catalysts was carried out in the safflower oil transesterification. The studied variables were three: number of cycles of use, washing between cycles and type of solvent to do the washing. Parameters specified by the European standard UNE-EN 14214 were taken as response variables. These parameters were methyl esters content, viscosity and acid value. The fresh and spent catalysts were characterized by XRD, SEM, IR, AA and Hammett Method. It was found that with both catalysts after the first use, a high methyl esters content is obtained (94% and 98% with the K2O/NaX and Na2O/NaX, respectively). However, both catalysts lose activity according to a second order deactivation law. The deactivation constant of the K2O/NaX was found to be about three times higher than that calculated for the Na2O/NaX catalyst. The deactivation was found to be mainly due to leaching of active species and catalytic surface fouling. Nevertheless, the Na2O/NaX catalyst leads to attain high methyl esters content (94-96%) very close to that specified by the aforementioned standard even after several uses. Also, viscosity and acid values of the biodiesel produced with this catalyst met the norm at all uses. Therefore, between the studied catalysts here, Na2O/NaX is the recommended one to produce biodiesel from safflower oil transesterification at a greater scale. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：220 / 226

页数：7

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