Sulfated-Alumina-Catalyzed Triacetin Synthesis: An Optimization Study of Glycerol Esterification

被引：8
|
作者：
Ferreira, Felipe Baiao [1 ]
da Silva, Marcio Jose [1 ]
Rodrigues, Fabio de Avila [1 ]
da Silva Faria, Wagner Luis [1 ]
机构：
[1] Univ Fed Vicosa, Chem Dept, BR-36570900 Vicosa, MG, Brazil
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2022年 / 61卷 / 12期
关键词：
SOLID ACID CATALYSTS; BY-PRODUCT; ACETYLATION; PROGRESS;
D O I：
10.1021/acs.iecr.1c04782
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The catalytic activity of sulfated gamma-Al2O3wasevaluated for glycerol esterification using response surface method-ology (RSM) with a central composite design (CCD), having asresponse variable triacetin (TAG) yield. Temperature, glycerol/acetic acid molar ratio, and catalyst load were chosen as variables.The analysis of variance (ANOVA) verified that, for the studiedrange, only the temperature, molar ratio, their interactions, andquadratic terms were significant statistically. Among the adoptedconditions for sulfated gamma-Al2O3, the best result attained was 100%glycerol conversion and 39.9% TAG yield at 106.8 degrees C, 1:8 molarratio, and 0.75 wt % catalysts. The optimization indicated amaximum yield of 43.6% at 106.8 degrees C, 1:11.4 molar ratio, and 0.53wt % SO42-/gamma-Al2O3. The kinetic study of the reaction rate suggeststhefirst-order dependence on glycerol concentration and activation energy of 59.91 kJ mol-
引用
收藏
页码：4235 / 4243
页数：9
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