Adsorption, diffusion, and reaction phenomena on FCC catalysts in the CREC riser simulator

被引：16

作者：

Atias, JA ^{[1
]}

de Lasa, H ^{[1
]}

机构：

[1] Univ Western Ontario, Fac Engn, Chem Reactor Engn Ctr, London, ON N6A 5B9, Canada

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2004年 / 43卷 / 16期

关键词：

D O I：

10.1021/ie034197q

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Two typical FCC catalysts with similar acidities and structural properties and different crystallite sizes, CAT-SC (0.4 mum) and CAT-LC (0.9 mum), are studied in a novel CREC riser simulator using 1,3,5-triisopropylbenzene. Catalytic and thermal runs allow for the development of a heterogeneous kinetic model and the assessment of intrinsic kinetic constants and adsorption and diffusional parameters. Analysis of 1,3,5-triisopropylbenzene conversions and product distribution helps establish the influence of intracrystallite diffusion as the controlling step at lower reaction temperatures (350-450 degreesC). Moreover, product distribution and selectivity differences between the CAT-SC and CAT-LC catalysts provide evidence of cracking reactions affected by hindered diffusion of the reactant and products.

引用

页码：4709 / 4720

页数：12

共 32 条

[1] INFLUENCE OF EXTERNAL SURFACE-AREA OF RARE-EARTH CONTAINING Y-ZEOLITES ON THE CRACKING OF 1,3,5-TRIISOPROPYLBENZENE [J].

AGUIAR, EFS ;

VALLE, MLM ;

SILVA, MP ;

SILVA, DF .

ZEOLITES, 1995, 15 (07) :620-623

[2] Diffusion and catalytic cracking of 1,3,5 tri-iso-propyl-benzene in FCC catalysts [J].

Al-Khattaf, S ;

Atias, JA ;

Jarosch, K ;

de Lasa, H .

CHEMICAL ENGINEERING SCIENCE, 2002, 57 (22-23) :4909-4920

[3] The role of diffusion in alkyl-benzenes catalytic cracking [J].

Al-Khattaf, S ;

de Lasa, H .

APPLIED CATALYSIS A-GENERAL, 2002, 226 (1-2) :139-153

[4] Catalytic cracking of cumene in a riser simulator: A catalyst activity decay model [J].

Al-Khattaf, S ;

de Lasa, H .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2001, 40 (23) :5398-5404

[5] Catalytic conversion of 1,2,4-trimethylbenzene in a CREC riser simulator. A heterogeneous model with adsorption and reaction phenomena [J].

Atias, JA ;

Tonetto, G ;

de Lasa, H .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2003, 42 (18) :4162-4173

[6]

Atias JA, 2003, INT J CHEM REACT ENG, V1

[7] Simultaneous diffusion, adsorption, and reaction in fluid catalytic cracking catalysts [J].

Bidabehere, CM ;

Sedran, U .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2001, 40 (02) :530-535

[8]

CAMPOS DS, 2000, STUD SURF SCI CATAL, V129, P639

[9]

Chen WH, 2002, STUD SURF SCI CATAL, V141, P537

[10] An interior trust region approach for nonlinear minimization subject to bounds [J].

Coleman, TF ;

Li, YY .

SIAM JOURNAL ON OPTIMIZATION, 1996, 6 (02) :418-445

← 1 2 3 4 →