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Light hydrocarbon gas conversion using porphyrin catalysts

Description: The objective of this project is to develop novel catalysts for the direct conversion of natural gas to a liquid fuel. The current work investigates the use of biomimetic metalloporphyrins as catalysts for the partial oxidation of light alkanes to alcohols.
Date: July 1, 1995
Creator: Showalter, M.C. & Shelnutt, J.A.
Partner: UNT Libraries Government Documents Department

Light hydrocarbon gas conversion using halogenated porphyrin catalysts

Description: Enzymes such at the cytochromes P450 are known to catalyze the partial oxidation of unactivated alkanes to alcohols. Analysis of these natural systems indicates structural features needed to create a biomimetic catalyst which will mimic the enzyme`s high catalytic activity and selectivity. Metalloporphyrins have been reported to catalyze the oxidation of light alkanes to alcohols under mild conditions using molecular oxygen as the oxidant without the need for added co-reductant. The authors are attempting to develop more active catalysts for this process, toward the goal of obtaining a catalyst which is active enough to convert methane to methanol. They are using computer-aided molecular design (CAMD) in conjunction with activity testing to develop improved metalloporphyrin catalysts. The authors stepwise approach to catalyst development involves first using CAMD techniques to design potential porphyrin catalysts, followed by the synthesis and characterization of promising catalysts, and finally subjecting these catalysts to bench scale activity testing. Catalyst testing experiments give insights into important structure-activity relationships which are used to evaluate and refine their modeling tools so that better catalysts can be developed.
Date: September 1, 1994
Creator: Showalter, M. C. & Shelnutt, J. A.
Partner: UNT Libraries Government Documents Department

Novel metalloporphyrin catalysts for the oxidation of hydrocarbons

Description: Work was done for developing biomimetic oxidation catalysts. Two classes of metalloporphyrin catalysts were studied. The first class of catalysts studied were a novel series of highly substituted metalloporphyrins, the fluorinated iron dodecaphenylporphyrins. These homogeneous metalloporphyrin catalysts were screened for activity as catalysts in the oxidation of hydrocarbons by dioxygen. Results are discussed with respect to catalyst structural features. The second type of catalysts studied were heterogeneous catalysts consisting of metalloporphyrins applied to inorganic supports. Preliminary catalytic testing results with these materials are presented.
Date: November 1, 1996
Creator: Showalter, M.C.; Nenoff, T.M. & Shelnutt, J.A.
Partner: UNT Libraries Government Documents Department