High selective conversion of methane to carbon monoxide and the effects of chlorine additives in the gas and solid phases on the oxidation of methane on strontium hydroxyapatites
- Univ. of Tokushima (Japan). Dept. of Chemical Science and Technology
- Univ. of Waterloo, Ontario (Canada)
Selectivities to carbon monoxide higher than 90% for conversions of methane greater than 10% were obtained from the partial oxidation of methane on stoichiometric strontium hydroxyapatite (SrHAp1.67) at 873 K during 6 h on stream. However, the activities decreased gradually with increasing the time-on-stream to 78 h due to the transformation of the apatite to Sr{sub 3}(PO{sub 4}){sub 2}. With small quantities of tetrachloromethane (TCM) added to the feedstream, the high selectivity to CO was retained while the conversion suffered a marked decrease with increasing the times-on-stream. In the presence of TCM the catalytic solid consists of a complex mixture of hydroxyapatite, chlorapatite, phosphate and chloride, each of which contributes dissimilarly to the catalytic process.
- Sponsoring Organization:
- Natural Sciences and Engineering Research Council of Canada, Ottawa, ON (Canada)
- OSTI ID:
- 452282
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 2 Vol. 36; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
Similar Records
A comparative study of the oxides of lanthanum, cerium, praseodymium, and samarium as catalysts for the oxidative dehydrogenation of methane in the presence and absence of carbon tetrachloride
Partial oxidation of methane to carbon monoxide and hydrogen with molecular oxygen and nitrous oxide over hydroxyapatite catalysts