Kinetics of the esterification of palmitic acid with methanol catalyzed by 12-tungstophosphoric acid supported on ZrO2

被引：22
|
作者：
Srilatha, K. [1 ]
Lingaiah, N. [1 ]
Prasad, P. S. Sai [1 ]
Devi, B. L. A. Prabhavathi [2 ]
Prasad, R. B. N. [2 ]
机构：
[1] Indian Inst Chem Technol, Catalysis Div, Hyderabad 500007, Andhra Pradesh, India
[2] Indian Inst Chem Technol, Ctr Lipid Sci & Technol, Hyderabad 500007, Andhra Pradesh, India
来源：
REACTION KINETICS MECHANISMS AND CATALYSIS | 2011年 / 104卷 / 01期
关键词：
Esterification; Biodiesel; Kinetic model; Palmitic acid; 12-Tungstophosphoric acid; Zirconia; ION-EXCHANGE-RESINS; BIODIESEL PRODUCTION; HYDROUS ZIRCONIA; FATTY-ACIDS; ACETIC-ACID; SILICA; ALKYLATION; CONVERSION; STABILITY; ACYLATION;
D O I：
10.1007/s11144-011-0334-z
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of catalysts containing 5-25 wt% 12-tungstophosphoric acid supported on hydrous zirconia were prepared and their catalytic activity evaluated for the esterification of palmitic acid with methanol. These catalysts were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, surface area (BET method), and potentiometric titration for the estimation of acidity. The catalyst with 20 wt% TPA calcined at 300 A degrees C exhibited the highest activity. The effects of reaction variables such as catalyst loading, methanol to acid molar ratio and reaction temperature were studied. The pseudo-homogeneous (PH), Eley-Rideal (ER) and Langmuir-Hinshelwood-Hougen-Watson (LHHW) kinetic models were applied to correlate the experimental kinetic data and kinetic parameters were evaluated. The LHHW model gave the best fit.
引用
收藏
页码：211 / 226
页数：16
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