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Int. J. Mol. Sci. 2002, 3(4), 423-434; doi:10.3390/i3040423
Article

Zeolite-Catalyzed Hydrocarbon Formation from Methanol: Density Functional Simulations

* , ,  and
Accelrys Inc., 9685 Scranton Road, San Diego, California 92121, USA
* Author to whom correspondence should be addressed.
Received: 16 October 2001 / Accepted: 31 January 2002 / Published: 25 April 2002
(This article belongs to the Special Issue Application of Density Functional Theory)
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Abstract

We report detailed density functional theory (DFT) calculations of important mechanisms in the methanol to gasoline (MTG) process in a zeolite catalyst. Various reaction paths and energy barriers involving C-O bond cleavage and the first C-C bond formation are investigated in detail using all-electron periodic supercell calculations and recently developed geometry optimization and transition state search algorithms. We have further investigated the formation of ethanol and have identified a different mechanism than previously reported [1], a reaction where water does not play any visible role. Contrary to recent cluster calculations, we were not able to find a stable surface ylide structure. However, a stable ylide structure built into the zeolite framework was found to be possible, albeit a very high reaction barrier.
Keywords: Density functional theory; MTG; methanol; hydrocarbons; gasoline; zeolite; catalyst; supercell; geometry optimization; transition state Density functional theory; MTG; methanol; hydrocarbons; gasoline; zeolite; catalyst; supercell; geometry optimization; transition state
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Govind, N.; Andzelm, J.; Reindel, K.; Fitzgerald, G. Zeolite-Catalyzed Hydrocarbon Formation from Methanol: Density Functional Simulations. Int. J. Mol. Sci. 2002, 3, 423-434.

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Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert