|Table of Contents|

Process of Chlorination of Benzene in Catalytic-Distillation Column with Vapor Diffluence——Calculation of Pressure Drop of Beds and Ratio of Vapor Diffluence

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2005年06期
Page:
700-704
Research Field:
Publishing date:

Info

Title:
Process of Chlorination of Benzene in Catalytic-Distillation Column with Vapor Diffluence——Calculation of Pressure Drop of Beds and Ratio of Vapor Diffluence
Author(s):
CUI Mi-fenHUANG Xue-zhenQIAO XuSHI Jun
Institute of Chemical Engineering,Nanjing University of Technology,Nanjing 210009,China
Keywords:
benzene chlorobenzene catalytic-distillation tower vapor diffluence pressure drop
PACS:
TQ203
DOI:
-
Abstract:
According to the fact that the direct load of the small particle catalyst in commercial scale catalyticdist illation tower results in remarkable pressure drop which makes operat ion infeasible, an idea is put forth that part of the benzene vapor rising from the tower bottom can shunt through hypass instead of passing through the catalyst beds because the bed pressure drop is direct ration to the square of flow rate. But, in this way, the catalyst beds were of the mere catalysis and the great decline of separation function is made, which makes chlorobenzene select ivity lower.There was a suitable flow distribution ratio between the bed and the bypass. A kind of catalyticdist illation experiment equipment of the new idea mentioned above was designed.The pressure drop of the beds in the equipment was measured. Different flow distribution ratios between the beds and the bypass and the lower proportion of the bed pressure drop under the different packing modes of catalyst were calculated. When the vapor diffluence proportion was 58. 4%, 3719% and 27. 8%, the corresponding lowered proportion of the bed pressure drop was 57. 25% , 40. 68% and 32. 25%, respectively. The value of pressure drop in a commercial scale catalytic- distillation tower was also estimated.

References:

[ 1] 崔咪芬, 乔旭. 苯氯化气液反应精馏实验[ J] . 南京化工大学学报, 1998, 20( 3) : 27- 31.
[ 2] 崔咪芬, 乔旭. 苯氯化三相催化精馏工艺技术研究[ J] . 化学工程, 2002, 30( 1) : 29- 32.
[ 3] Specchia V, Baldi G. Pressure drop and liquid holdup for two phase concurrent flow in packed beds [ J] . Chemical Eng-i neering Science, 1977, 32: 515- 523.
[ 4] Turpin J L, Huntington R L. Prediction of pressure drop for two- phase, two- component concurrent flow in packed beds [ J] . AIChE Journal, 1967, 13( 6) : 1 196- 1 202.
[ 5] Rao V G, Ananth M S, Varma Y B G. Hydrodynamics of two-phase cocurrene downflow through packed beds [ J ] . AIChE Journal, 1983, 29( 3) : 467- 482.
[ 6] Moller L B, Halken C, Hansen J A et al. Liquid and gas distribution in trickle- bed reactors [ J] . Ind. Eng. Chem Res, 1996, 35: 926- 930.
[ 7] Larachi F, Laurent A, Midoux N, et al. Experimental study of a trickle- bed reactor operating at high pressure: two- phase pressure drop and liquid saturation [ J] . Chemical Engineering Science, 1991, 46( 5/ 6) : 1 233- 1 245.

Memo

Memo:
-
Last Update: 2013-03-03