Abstract: Conversion of Propylene and Propanal On HZSM-5 (2009 Annual Meeting)

Tuesday, November 10, 2009: 10:05 AM

Delta Ballroom C (Gaylord Opryland Hotel)

Trung Hoang, School of Chemical, Biological and Materials Engineering, Center for Biomass Refining, University of Oklahoma, Norman, OK

Xinli Zhu, School of Chemical, Biological and Materials Engineering, Center for Biomass Refining, University of Oklahoma, Norman, OK

Tawan Sooknoi, Chemistry, King Mongkut Institute of Technology Ladkrabang, Bangkok, Thailand

Daniel E. Resasco, School of Chemical, Biological, and Materials Engineering, Center for Biomass Refining, University of Oklahoma, Norman, OK

Lance L. Lobban, School of Chemical, Biological and Materials Engineering, Center for Biomass Refining, University of Oklahoma, Norman, OK

Richard G. Mallinson, School of Chemical, Biological and Materials Engineering, Center for Biomass Refining, University of Oklahoma, Norman, OK

Propanal is representative of a number of small reactive oxygenates derived from thermal processing of biomass. Its reactivity has been studied on HSZM-5 with a Si/Al of 45 and compared to the reactions of propylene. Propanal is found to be much more reactive and to initially form mostly 2-methyl-2-pentenal and the C₉ aromatic. Propylene, in contrast, initially forms C₆ and C₇ aromatics, in agreement with the literature. It is proposed that 2-methyl-2-pentenal is formed by aldol condensation and the C₉ aromatic is from the dehydration of the aldol trimer, in addition to the aromatization of olefins via the hydrocarbon pool. Propanal also dehydrates to form propylene, but this appears to be an inert product at milder condition.

Extended Abstract: File Uploaded

See more of this Session: Catalytic Conversion of Oxygenates
See more of this Group/Topical: Fuels and Petrochemicals Division