Hydrocracking of n-alkane mixtures on Pt/H-Y zeolite: Chain length dependence of the adsorption and the kinetic constants

被引:61
作者
Denayer, JF
Baron, GV
Souverijns, W
Martens, JA
Jacobs, PA
机构
[1] FREE UNIV BRUSSELS,DEPT CHEM ENGN,B-1050 BRUSSELS,BELGIUM
[2] KATHOLIEKE UNIV LEUVEN,CTR SURFACE CHEM & CATALYSIS,B-3001 HEVERLEE,BELGIUM
关键词
D O I
10.1021/ie960657m
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The conversion of a mixture of n-hexane, n-heptane, n-octane and n-nonane, in the presence of hydrogen over zeolite Pt/H-Y is modeled using a multicomponent adsorption-reaction scheme. Adsorption parameters for the relevant hydrocarbon molecules are determined using the chromatographic technique. Intrinsic reaction parameters are obtained by the fitting of the model to reaction rate data from catalytic experiments, using the independently determined adsorption parameters. Preferential conversion of the longer n-alkanes in mixtures is caused by competitive adsorption favoring the heavy compounds. Apparent reaction rates in mixtures are controlled by adsorption, increasing with chain length of the n-alkanes, rather than by the individual intrinsic reaction rates of the different n-alkanes, which are similar.
引用
收藏
页码:3242 / 3247
页数:6
相关论文
共 21 条
[1]   FUNDAMENTAL KINETIC MODELING OF HYDROISOMERIZATION AND HYDROCRACKING ON NOBLE-METAL-LOADED FAUJASITES .1. RATE PARAMETERS FOR HYDROISOMERIZATION [J].
BALTANAS, MA ;
VANRAEMDONCK, KK ;
FROMENT, GF ;
MOHEDAS, SR .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1989, 28 (07) :899-910
[2]   ISOMERIZATION OF XYLENE AND METHYLATION OF TOLUENE ON ZEOLITE H-ZSM-5 - COMPOUND KINETICS AND SELECTIVITY [J].
BESCHMANN, K ;
RIEKERT, L .
JOURNAL OF CATALYSIS, 1993, 141 (02) :548-565
[3]   MECHANISM OF HYDROCRACKING - REACTIONS OF PARAFFINS + OLEFINS [J].
COONRADT, HL ;
GARWOOD, WE .
INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1964, 3 (01) :38-&
[4]  
DARKEN LS, 1948, T AM I MIN MET ENG, V175, P184
[5]   Adsorption of normal and branched paraffins in faujasite zeolites NaY, HY, Pt/NaY and USY [J].
Denayer, JFM ;
Baron, GV .
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, 1997, 3 (04) :251-265
[6]  
DENAYER JFM, 1996, P 5 WORLD C CHEM ENG, P582
[7]   A SIMPLE VANDERWAALS MODEL FOR MOLECULE-CURVED SURFACE INTERACTIONS IN MOLECULAR-SIZED MICROPOROUS SOLIDS [J].
DEROUANE, EG ;
ANDRE, JM ;
LUCAS, AA .
CHEMICAL PHYSICS LETTERS, 1987, 137 (04) :336-340
[8]   THE MECHANISM OF CATALYTIC HYDROCRACKING [J].
FLINN, RA ;
LARSON, OA ;
BEUTHER, H .
INDUSTRIAL AND ENGINEERING CHEMISTRY, 1960, 52 (02) :153-156
[9]  
Froment G. F., 1987, Catal. Today, V1, P455, DOI [10.1016/0920-5861(87)80009-3, DOI 10.1016/0920-5861(87)80009-3]
[10]  
HAAG WO, 1982, FARADAY GENERAL DISC, V72, P317