Direct catalytic conversion of methane and light hydrocarbon gases. Quarterly report No. 3, April 16--July 15, 1987
The goal of this research is to develop catalysts that directly convert methane and light hydrocarbons to intermediates that can, as economics dictate, be subsequently converted either to liquid fuels or value-added chemicals. In this program we are exploring two approaches to developing such catalysts. The first approach consists of developing advanced catalysts for reforming methane. We will prepare the catalysts by reacting organometallic complexes of transition metals (Fe, Ru, Rh, and Re) with zeolitic and rare-earth-exchanged zeolitic supports to produce surface-confined metal complexes in the zeolite pores. Our second approach entails synthesizing the porphyrin and phthalocyanine complexes of Cr, Mn, Ru, Fe, and/or Co within the pores of zeolitic supports for use as selective oxidation catalysts for methane and light hydrocarbons. During this reporting period, we concentrated on synthesizing and testing methane oxidation catalysts using the automated GC sampling system. We modified our preparation method of zeolite-encapsulated phthalocyanines (PC). The catalysts have higher complex loading, and the uncomplexed metal ions were back-exchanged by sodium ions (to remove any uncomplexed metal ions). Four metal ions were used: cobalt, iron, ruthenium, and manganese. We also synthesized four zeolite-encapsulated tetraphenylporphyrin (TPP) complexes using the same metals. These catalysts were tested for methane oxidation in the temperature range from 300{degrees} to 500{degrees}C at 50 psig pressure. The RUPC, COTPP, and MNTPP showed activity toward the formation of methanol. The RUPC zeolite gave the best methanol yield. The methane conversion was 4.8%, and the selectivity to methanol is 11.3% at 375{degrees}C. Again, the major products are carbon dioxide and water in every catalyst we tested during this reporting period.
- Research Organization:
- SRI International, Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-86PC90011
- OSTI ID:
- 85186
- Report Number(s):
- DOE/PC/90011-T3; ON: DE95014803
- Resource Relation:
- Other Information: PBD: 28 Aug 1987
- Country of Publication:
- United States
- Language:
- English
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Direct catalytic conversion of methane and light hydrocarbon gases. Quarterly report No. 2, January 16, 1987--April 15, 1987
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Related Subjects
40 CHEMISTRY
03 NATURAL GAS
METHANE
CONVERSION
OXIDATION
CATALYSTS
CHEMICAL PREPARATION
PERFORMANCE TESTING
COBALT COMPLEXES
CATALYTIC EFFECTS
RUTHENIUM COMPLEXES
MANGANESE COMPLEXES
METHANOL
CHEMICAL REACTION YIELD
PROGRESS REPORT
EXPERIMENTAL DATA
PHTHALOCYANINES
ZEOLITES
CATALYST SUPPORTS