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Simulation of activity loss of fixed bed catalytic reactor of MTO conversion using percolation theory

Izadbakhsh, A ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ces.2011.08.047
  3. Publisher: 2011
  4. Abstract:
  5. In this investigation, a reactor model for prediction of the deactivation behavior of MTO's porous catalyst in a fixed bed reactor is developed. Effect of coking on molecular transport in the porous structure of SAPO-34 has been simulated using the percolation theory. Thermal effects of the reaction were considered in the model and the temperature profile of the gas stream in the reactor was predicted. The predicted loss in catalyst activity with time-on-stream was in very good agreement with the experimental data. The resulting coke deposition and gas temperature profiles along the length of reactor suggested a reaction front moving toward the outlet of the fixed bed reactor at the operating experimental conditions of 1h -1 and 723K for methanol space velocity and inlet temperature, respectively. Effects of space time, coordination of Bethe network, and effective diffusivity of component in reaction mixture on the reactor performance are presented
  6. Keywords:
  7. Methanol-to-Olefin ; Porous media ; Activity loss ; Catalytic reactor ; Coke deposition ; Effective diffusivities ; Experimental conditions ; Experimental data ; Fixed bed ; Fixed bed reactor ; Gas streams ; Gas temperature profile ; Inlet temperature ; Mathematical modeling ; Methanol to olefin ; Molecular transport ; Percolation theory ; Porous catalysts ; Porous structures ; Reaction front ; Reaction mixture ; Reactor models ; Reactor performance ; SAPO-34 ; Space time ; Space velocities ; Temperature profiles ; Catalyst deactivation ; Chemical reactors ; Computer simulation ; Coordination reactions ; Methanol ; Olefins ; Packed beds ; Percolation (solid state) ; Porous materials ; Solvents ; Temperature control ; Catalyst activity
  8. Source: Chemical Engineering Science ; Volume 66, Issue 23 , December , 2011 , Pages 6199-6208 ; 00092509 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0009250911006166