期刊
CHEMICAL ENGINEERING SCIENCE
卷 58, 期 14, 页码 3175-3185出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0009-2509(03)00154-4
关键词
kinetics; optimisation; parameter identification; reactive distillation; esterification; sulphated zirconia
In a previous study on the basis of reaction equilibrium, it was demonstrated that the synthesis of fatty acids esters of heavy alcohols by catalytic reactive distillation (RD) is basically feasible. Presently, the analysis is expanded to the kinetics-based design applied to the synthesis of 2-ethylhexyl dodecanoate. Experimental data for a super-acidic sulphated zirconia catalyst are employed. It is shown that this catalyst is highly selective even for the high alcohol/acid ratios as prevail in a RD column. To avoid catalyst deactivation, liquid-liquid segregation into an organic and an aqueous phase must be prevented, and operating temperatures beyond 373 K must be chosen. A kinetic model based on liquid activities is proposed, with parameters determined from both kinetic and equilibrium measurements. A typical column design has 13 reactive stages with a catalyst loading of 170 kg m(-3), temperature profile of 400-440 K, and a space velocity of 0.022 kmol kg(cat)(-1) h(-1) for 99.9% purity product ester. A modified Damkohler number is proposed. (C) 2003 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据