US EPA

1935413 

Journal Article 

Search for New Catalysts for the Oxidation of SO2 

Loskyll, J; Stöwe, K; Maier, WF 

2013 

1 

ACS Combinatorial Science
ISSN: 2156-8952
EISSN: 2156-8944 

15 

9 

464-474 

English 

23838612 

10.1021/co400023j 

WOS:000324284800004 

https://pubs.acs.org/doi/10.1021/co400023j
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The focus of this paper is the search and characterization of novel catalysts for the gas phase oxidation of concentrated SO2 for the production of sulfuric acid. Modern high-throughout (HT) methods such as emissivity corrected Infrared Thermography (ecIRT) and automated synthesis techniques were used for the synthesis and activity measurements of the samples. In addition a plug flow reactor that uses UV-vis online analytics for the quantification of the SO2 conversion was designed, built and used for validation of the HT results. The study started with a highly diverse search space of elemental compositions designed for potential discovery. About a thousand samples were synthesized using sol-gel recipes and screened for catalytic SO2 oxidation activity over a temperature range of 330-450 °C. Several novel catalyst systems were discovered during the screening process and the most interesting systems were further characterized. The most important doping effects on activity found were the influence of bismuth and selenium doping on standard sulfuric acid catalysts, the activity gain of chromium based catalysts caused by the doping with antimony and the activity gain of chromium as well as iron and vanadium based catalysts caused by the doping with tin. 

heterogeneous catalysis; SO2 oxidation; sulfuric acid production; high-throughput; emissivity corrected infrared thermography (ecIRT)