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Titolo:
Nature and location of deposit on beta zeolite catalyst for isopropylationof benzene with propene to cumene
Autore:
Bian, JJ; Liu, J; Liu, YH; Wang, XS; Liu, XM; Bao, XH;
Indirizzi:
Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116012, Peoples R China Dalian Univ Technol Dalian Peoples R China 116012 16012, Peoples R China Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China Chinese Acad Sci Dalian Peoples R China 116023 n 116023, Peoples R China
Titolo Testata:
CHINESE JOURNAL OF CATALYSIS
fascicolo: 5, volume: 22, anno: 2001,
pagine: 415 - 418
SICI:
0253-9837(200109)22:5<415:NALODO>2.0.ZU;2-2
Fonte:
ISI
Lingua:
CHI
Soggetto:
COKE;
Keywords:
beta zeolite; benzene; propene; isopropylation; cumene; deactivation; deposit;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
7
Recensione:
Indirizzi per estratti:
Indirizzo: Bian, JJ Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116012, Peoples R China Dalian Univ Technol Dalian Peoples R China 116012 oples R China
Citazione:
J.J. Bian et al., "Nature and location of deposit on beta zeolite catalyst for isopropylationof benzene with propene to cumene", CHIN J CATA, 22(5), 2001, pp. 415-418

Abstract

The modified beta zeolite catalyst showed excellent performance (e.g. activity, selectivity and stability) in isopropylation of benzene with propene to cumene in liquid phase. C-13 NMR, IR, GC-MS and TG combined with some techniques including solvent-extraction method, TPO and structure characterization were applied to determine the components of the deposit on the coked beta zeolite catalyst after reaction for 8 000 h in pilot-plant scale. It was shown that the composition of the deposit consists mainly of multi-isopropyl benzene (55.3%) and tetrahydronaphthalene (17.3%), locating in the pores and channels of the zeolite instead of on the surface of the catalyst. The activity of the regenerated zeolite catalyst can be restored to 92% of that of the fresh one after TPO (in 3%Q(2)-97%N-2 from 30 to 500 degreesC ata heating rate of 15 degreesC/min and then kept at 500 degreesC for 1 h). The higher heating rate in TPO is suitable for the regeneration of the catalyst rather than the lower rate.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 08:35:04