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Date of Publication:2022-10-10

Journal:高校化学工程学报

Affiliation of Author(s):化工学院

Issue:5

Page Number:1095-1103

ISSN No.:1003-9015

Abstract:A one-dimensional quasi-homogeneous reactor model was established to simulate methanol-to-olefin processes in fixed bed reactors based on industrial MTO production. A lumped kinetic model with SAPO-34 catalyst was adopted. A porous medium transfer model and Spalart-Allmaras turbulence model were chosen during steady simulation in FLUENT software. The distribution of temperature and concentration fields in the reaction tube were obtained during simulation, and the applicability of the model was verified by comparing with literature data. The effects of operating parameters (feed temperature, operating pressure and feed ratio of water to methanol) on methanol conversion, olefin selectivity and molar ratio of ethylene to propylene were studied. The simulation investigated the distribution principles of temperature, composition, selectivity and other parameters along the reaction tube. The results show that these parameters affect methanol conversion and product selectivity. The optimum parameters are determined, which are feed temperature 723 ~ 773 K, operating pressure 0.3 ~ 0.4 MPa and feed ratio of water to methanol<0.5.These results are helpful for MTO research and applications.

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