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Title: Selective methane oxidation over promoted oxide catalysts. Quarterly technical progress report, December 1, 1992--February 28, 1993

Abstract

Sulfate anion was used to modify the surface basicity of 1 wt% Sr/La{sub 2}O{sub 3}, and catalytic tests were carried out to probe the selective oxidation of methane to C{sub 2} coupling products over these catalysts. Over a range of reaction temperatures of 500--700{degrees}C, most of the catalytic tests were carried out with a 1 wt% SO{sub 4} {sup 2{minus}}/1 wt% Sr/La{sub 2}O{sub 3}with a CH{sub 4}/air = 1/1 reactant mixture at 1 atm and with a gas hourly space velocity (GHSV) = 70,000 {ell}/kg catal/hr. The sulfated catalyst showed the largest improved catalytic effect at 500{degrees}C. Compared to the activity of the nonsulfated Sr/La{sub 2}O{sub 3}, the sulfated catalyst resulted in enhancement of the methane conversion, the C{sub 2} selectivity, and the yield of C{sub 2} products. In situ laser Raman spectroscopy was used to characterize the surface of sulfated and nonsulfated catalysts. Preliminary results indicate that the sulfate anion preferentially bonded to the Sr rather than to the La ions. The promoting effect of the acidic sulfate on the catalytic activity of basic Sr/La{sub 2}O{sub 3} seems to be due to the inhibition of carbonate formation on the surface Sr ions.

Authors:
; ; ;
Publication Date:
Research Org.:
Lehigh Univ., Bethlehem, PA (United States). Zettlemoyer Center for Surface Studies
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10176531
Report Number(s):
DOE/MC/29228-3407
ON: DE93040002
DOE Contract Number:  
FG21-92MC29228
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Mar 1993
Country of Publication:
United States
Language:
English
Subject:
10 SYNTHETIC FUELS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 01 COAL, LIGNITE, AND PEAT; OXIDATION; CATALYSTS; METHANE; LANTHANUM OXIDES; CATALYTIC EFFECTS; STRONTIUM; SULFATES; PROGRESS REPORT; PROMOTERS; METHANOL; FORMALDEHYDE; TEMPERATURE DEPENDENCE; OXYGEN; AIR; RAMAN SPECTRA; 100200; 400201; 010408; PRODUCTION; CHEMICAL AND PHYSICOCHEMICAL PROPERTIES; C1 PROCESSES

Citation Formats

Klier, K, Herman, R G, Sarkany, J, and Sun, Q. Selective methane oxidation over promoted oxide catalysts. Quarterly technical progress report, December 1, 1992--February 28, 1993. United States: N. p., 1993. Web. doi:10.2172/10176531.
Klier, K, Herman, R G, Sarkany, J, & Sun, Q. Selective methane oxidation over promoted oxide catalysts. Quarterly technical progress report, December 1, 1992--February 28, 1993. United States. doi:10.2172/10176531.
Klier, K, Herman, R G, Sarkany, J, and Sun, Q. Mon . "Selective methane oxidation over promoted oxide catalysts. Quarterly technical progress report, December 1, 1992--February 28, 1993". United States. doi:10.2172/10176531. https://www.osti.gov/servlets/purl/10176531.
@article{osti_10176531,
title = {Selective methane oxidation over promoted oxide catalysts. Quarterly technical progress report, December 1, 1992--February 28, 1993},
author = {Klier, K and Herman, R G and Sarkany, J and Sun, Q},
abstractNote = {Sulfate anion was used to modify the surface basicity of 1 wt% Sr/La{sub 2}O{sub 3}, and catalytic tests were carried out to probe the selective oxidation of methane to C{sub 2} coupling products over these catalysts. Over a range of reaction temperatures of 500--700{degrees}C, most of the catalytic tests were carried out with a 1 wt% SO{sub 4} {sup 2{minus}}/1 wt% Sr/La{sub 2}O{sub 3}with a CH{sub 4}/air = 1/1 reactant mixture at 1 atm and with a gas hourly space velocity (GHSV) = 70,000 {ell}/kg catal/hr. The sulfated catalyst showed the largest improved catalytic effect at 500{degrees}C. Compared to the activity of the nonsulfated Sr/La{sub 2}O{sub 3}, the sulfated catalyst resulted in enhancement of the methane conversion, the C{sub 2} selectivity, and the yield of C{sub 2} products. In situ laser Raman spectroscopy was used to characterize the surface of sulfated and nonsulfated catalysts. Preliminary results indicate that the sulfate anion preferentially bonded to the Sr rather than to the La ions. The promoting effect of the acidic sulfate on the catalytic activity of basic Sr/La{sub 2}O{sub 3} seems to be due to the inhibition of carbonate formation on the surface Sr ions.},
doi = {10.2172/10176531},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {3}
}