Coupling Oxidative and Non-Oxidative Methane Reactions
on Supported Metals
RESEARCH GROUP: Laboratory for the Science and Applications of Catalysis
RESEARCH DIRECTOR:
Enrique Iglesia, Professor of Chemical Engineering, University of
California at Berkeley and Faculty Scientist, Lawrence Berkeley Laboratory
SUMMARY:
This project explores the catalytic conversion
of natural gas to synthesis gas and higher hydrocarbons. Our research addresses
the mechanistic and site requirement for steam reforming, dry reforming and
partial oxidation reactions of methane at relatively high temperatures. Primary
and secondary reaction pathways, reaction rates and selectivities, and intrinsic
properties of individual metal components are being examined for steam reforming,
dry reforming, and partial oxidation pathways using kinetic analysis and
isotope and chemical transient methods in a gradientless reactor.
These pathways are treated using non-equilibrium thermodynamic methods and
a common kinetic scheme that considers a common C-H activation step and the
desorption or scavenging of the resulting fragments by coupling with activation
reactions of CO2, H2O, and O2. Supported noble and base metals, as well as
metal carbide clusters, are being examined as part of this project.
In situ X-ray absorption and infrared spectroscopic studies are combined
with these kinetic studies in order to confirm local catalyst structure and
the identity and reactivity of adsorbed intermediates. Transmission electron
microscopy and chemisorption methods before and after reaction are used to
complement these in situ characterization techniques.
Back to the LSAC Group Page
Last Updated 01/25/02.