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Titolo:
Modeling of methanol to olefins (MTO) process in a circulating fluidized bed reactor
Autore:
Soundararajan, S; Dalai, AK; Berruti, F;
Indirizzi:
Univ Saskatchewan, Dept Chem Engn, Saskatoon, SK S7N 5C9, Canada Univ Saskatchewan Saskatoon SK Canada S7N 5C9 skatoon, SK S7N 5C9, Canada
Titolo Testata:
FUEL
fascicolo: 8, volume: 80, anno: 2001,
pagine: 1187 - 1197
SICI:
0016-2361(200106)80:8<1187:MOMTO(>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIGHT OLEFINS; CONVERSION; RISERS; SAPO-34; SIMULATION;
Keywords:
methanol to olefins process; circulating fluidized bed; process simulation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Berruti, F Univ Saskatchewan, Dept Chem Engn, 110 Sci Pl, Saskatoon, SK S7N 5C9, Canada Univ Saskatchewan 110 Sci Pl Saskatoon SK Canada S7N 5C9 Canada
Citazione:
S. Soundararajan et al., "Modeling of methanol to olefins (MTO) process in a circulating fluidized bed reactor", FUEL, 80(8), 2001, pp. 1187-1197

Abstract

Methanol is obtained commercially from natural gas. However, production oflight olefins such as ethylene, propylene, etc. from natural gas is highervalue-added gas conversion option and therefore, the conversion of methanol to olefins is of industrial importance. In the present work, this processis simulated in a circulating fluidized bed (CFB) reactor at 450 degreesC and at atmospheric pressure. The simulation combined the kinetic model withSAPO-34 as the catalyst and the core-annulus type hydrodynamic model. The modeling studies indicated that the selectivity towards ethylene increased significantly with increase in coke deposit on the catalyst. This was attributed to the 'cage effect' of the coke on the catalyst. However, the increase in coke deposit on the catalyst also decreased the methanol conversion. At 5 wt% coke on the catalyst, the methanol conversion and C-2 + C-3 light olefin selectivity were optimum at 90 and 75 wt%, respectively. The influence of the exit geometry such as smooth exit, abrupt exit and exit with a projected end, on the solids hold-up and thereby on the methanol conversion and light olefin yield were also studied. As the exit geometry varied from smooth to exit with projected end, the methanol conversion increased due to the increased solids hold-up in the riser correspondingly increasing the light olefin yield. The simulator also predicts the flow characteristics within the CFB. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 03:58:26