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CAER Seminars


Dr. Anne M. Gaffney
Rohm and Haas Co.
Philadelphia, PA

Friday, May 14th, 2004 2:00 pm
Ben Bandy Conference Room
UK Center for Applied Energy Research

Major oil companies the world over are increasingly turning their attention to the technology referred to as "Gas to Liquids" as supplies of crude oil are depleted while the demand for sources of energy continues to increase. One solution to this challenge is to develop an economically viable technology to partially oxidize CH4 to carbon monoxide (CO) and hydrogen (H2), which may then be converted via the Fischer-Tropsch reaction to a mixture of hydrocarbon liquids and wax. This talk will address the structure-property-performance relationships of the promoted, Mg1-xNixO-based catalysts for the conversion of natural gas to syngas (synthesis gas - a mixture of CO and H2) with very high selectivities for CO and H2 at high CH4 conversion. Mn as a promoter resulted in improved conversion, selectivity and catalyst life while reducing coke formation. Catalyst characterization suggests that the role of the Mn promoter may be to valence-stabilize the Ni-species within the Mg1-xNixO solid solution thus inhibiting deep reduction of Ni+2 to Ni0 and subsequent surface aggregation of Ni0. Preventing the aggregation of Ni0 particles results in continual high catalytic performance with no carbonaceous deposition.