Understanding the mechanism in methanol steam reforming for Cu and PdZn supported catalysts using the transient kinetic analysis (TKA) approach

FUEL 190

RS. Disselkamp, robert.disselkamp@pnl.gov1, Yong Yang, yong.yang@pnl.gov1, V. La Barbier, vanessa.labarbier@pnl.gov1, LG. Cameron, lcameron@u.washington.edu2, IM. Jensen, mygind@u.washington.edu2, CT. Campbell, campbell@chem.washington.edu2, and CHF. Peden, chuck.peden@pnl.gov1. (1) Institute for Interfacial Catalysis, Pacific Northwest National Laboratory, 3335 Q Avenue; P.O. Box 999; MS K8-93, Richland, WA 99352, (2) Department of Chemistry, University of Washington, Seattle, WA 98195
A novel transient kinetic analysis (TKA) apparatus is employed in a study of methanol steam reforming (forward reaction-methanol/water feed) and reverse WGS/methanol synthesis (reverse reactions-carbon dioxide/hydrogen feed) on Cu and PdZn supported catalysts. The apparatus employed enables catalytic reaction mechanisms and kinetic parameters to be determined using a combined transmission FTIR-MS-TKA approach. Active surface intermediates such as carbonate(s), formate(s), COOH, and formyl are probed in the infrared and their signature related to catalyst activity. By comparing infrared signatures for metal-bound species for the forward versus reverse reactions active intermediates in product formation were probed and will be discussed. A pronounced catalyst support effect for methanol synthesis was found comparing an alumina versus silica support.
 

Fuel Processing for Hydrogen Production
8:25 AM-12:05 PM, Wednesday, August 22, 2007 Boston Park Plaza -- Berkeley Rm, Oral

Division of Fuel Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007