Co-processing methane and biomass-derived oxygenates over Mo/ZSM-5 catalysts for making hydrocarbon fuels

Do Young Hong, Aditya Bhan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The concurrent deoxygenation of C 2-C 3 oxygenates and dehydroaromatization of CH 4 was accomplished using Mo/ZSM-5 catalysts at 950 K in order to suppress catalyst deactivation by carbon deposition and to minimize depletion of aromatic products due to deep scavenging of CH x species by oxidants such as CO 2, O 2 and H 2O. A systematic study of C 2-C 3 oxygenates with varying Effective Hydrogen Index (EHI = (H-2(O))/C) and of reactant mixtures with varying oxygenate/CH 4 ratio (0.01-0.1) revealed that higher methane conversion is achieved in presence of oxygenate co-feed and that the formation rate and selectivity to CO increased with increasing oxygenate/CH 4 ratio. The formation rate of C 2 hydrocarbons was not influenced by the identity of the C 2 or C 3 oxygenate at oxygenate/CH 4 ratio of 0.035. In contrast, the rate of formation of benzene varied depending on the carbon number and alcohol, aldehyde/ketone, or acid functionality of the co-reactant. These results show that CH 4 can be directly used for deoxygenation reactions of biomass compounds at high temperature conditions. Structural and chemical characterization of the catalyst by infrared and X-ray absorption spectroscopy as well as outstanding mechanistic questions pertaining to the tendency of the Mo/ZSM-5 system to shed off oxygen as CO, CO 2, or H 2O will be discussed.

Original languageEnglish (US)
Title of host publication11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings
StatePublished - Dec 1 2011
Event2011 AIChE Annual Meeting, 11AIChE - Minneapolis, MN, United States
Duration: Oct 16 2011Oct 21 2011

Publication series

Name11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings

Other

Other2011 AIChE Annual Meeting, 11AIChE
CountryUnited States
CityMinneapolis, MN
Period10/16/1110/21/11

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