Influence of operating conditions on the observed reaction rate in the single channel monolith reactor

被引：36

作者：

Bercic, G ^{[1
]}

机构：

[1] Natl Inst Chem Ljubljana, Lab Catalysis & Chem React Engn, Ljubljana 1001, Slovenia

来源：

CATALYSIS TODAY | 2001年 / 69卷 / 1-4期

关键词：

D O I：

10.1016/S0920-5861(01)00390-X

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The catalytic hydrogenation of nitrobenzoic acid (NBA) to the aminobenzoic acid was used as a model reaction for a quantitative study of influences of the operating conditions on the observed reaction rate in a single channel monolith reactor operated in Taylor flow regime, A simple mathematical model was derived and used for the analysis of hydrogenation experiments carried out in batch mode. Results showed that in the investigated concentration range of NBA, i.e. 0.0005-0.02 mol/l and under the hydrogen pressure of 1 bar, the observed reaction rate is considerably limited by mass transport. At higher concentrations of NBA, the reaction is controlled by the hydrogen mass transport while at lower concentrations the mass transport of NBA is dominant. The analysis of experimental results, which were obtained when the length of gas bubbles and liquid slugs were varied, showed that the reaction took place in the thin liquid film surrounding the gas bubble. The liquid slug serves as exchanger of reactants and reaction products between bulk liquid slug and liquid film surrounding the catalyst surface. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：147 / 152

页数：6

共 21 条

[11] THE SEGMENTED 2-PHASE FLOW MONOLITHIC CATALYST REACTOR - AN ALTERNATIVE FOR LIQUID-PHASE HYDROGENATIONS [J].

HATZIANTONIOU, V ;

ANDERSSON, B .

INDUSTRIAL & ENGINEERING CHEMISTRY FUNDAMENTALS, 1984, 23 (01) :82-88

[12] SCALING UP OF A MONOLITHIC CATALYST REACTOR WITH 2-PHASE FLOW [J].

IRANDOUST, S ;

ANDERSSON, B ;

BENGTSSON, E ;

SIVERSTROM, M .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1989, 28 (10) :1489-1493

[13] LIQUID-FILM IN TAYLOR FLOW THROUGH A CAPILLARY [J].

IRANDOUST, S ;

ANDERSSON, B .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1989, 28 (11) :1684-1688

[14] GAS-LIQUID MASS-TRANSFER IN TAYLOR FLOW THROUGH A CAPILLARY [J].

IRANDOUST, S ;

ERTLE, S ;

ANDERSSON, B .

CANADIAN JOURNAL OF CHEMICAL ENGINEERING, 1992, 70 (01) :115-119

[15] Catalytic wet oxidation of acetic acid using platinum on alumina monolith catalyst [J].

Klinghoffer, AA ;

Cerro, RL ;

Abraham, MA .

CATALYSIS TODAY, 1998, 40 (01) :59-71

[16]

Perry R.H., 1984, PERRYS CHEM ENG HDB, VSixth, P3

[17]

PRESS WH, 1992, NUMERICAL RECIPES FO, P712

[18]

Reid R.C., 1987, PROPERTIES GASES LIQ, V4th, P598

[19]

SHERWOOD TK, 1975, MASS TRANSFER, P70

[20] Kinetics of nitrate reduction in monolith reactor [J].

Warna, J. ;

Turunen, I. ;

Salmi, T. ;

Maunula, T. .

CHEMICAL ENGINEERING SCIENCE, 1994, 49 (24B) :5763-5773

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