Kinetics of aqueous-phase hydrogenation of lactic acid to propylene glycol

被引：39

作者：

Zhang, ZG

Jackson, JE

Miller, DJ ^{[1
]}

机构：

[1] Michigan State Univ, Dept Chem Engn, E Lansing, MI 48824 USA

[2] Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2002年 / 41卷 / 04期

关键词：

D O I：

10.1021/ie0104767

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The kinetics of aqueous-phase hydrogenation of lactic acid to propylene glycol over a 5 wt % Ru/carbon catalyst have been characterized in a stirred batch reactor. A thorough analysis of mass-transfer resistances based on measurements of hydrogen solubility and gas-liquid masstransfer coefficients, application of correlations in the literature, and intraparticle diffusion calculations show that mass-transfer resistances are negligible at the temperatures (403-423 K) and hydrogen pressures (6.8-1-3.6 MPa) studied, A Langmuir-Hinshelwood (L-H) model is proposed and used to fit lactic acid conversion kinetics. The kinetic model provides insight into the catalytic reaction mechanism and forms the basis for design and further investigation of the aqueous-phase hydrogenation.

引用

页码：691 / 696

页数：6

共 18 条

[1] THE HYDROGENATION OF ESTERS TO ALCOHOLS AT 25-DEGREES-150-DEGREES [J].