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HERO ID
1704242
Reference Type
Journal Article
Title
Sulphur poisoning mechanism of SnO2 based catalysts for methane combustion
Author(s)
Zhou, CJ; Lin, W; Zhu, YX; Xie, YC
Year
2003
Is Peer Reviewed?
Yes
Journal
Acta Physico - Chimica Sinica
ISSN:
1000-6818
Volume
19
Issue
3
Page Numbers
246-250
DOI
10.3866/PKU.WHXB20030313
Web of Science Id
WOS:000181749700013
Abstract
The catalytic activity of several SnO2 based catalysts for methane combustion in the presence of 200 x 10(-6)( phi, volume fraction) SO2 were tested. The results showed that among these samples studied SnCrO possessed the highest resistance to sulphur poisoning, while the catalytic activity of SnCuO and SnCoO samples decreased significantly. XRD, BET, XPS, FT-IR and DTA-TG techniques were employed to characterize the samples before and after reaction in SO2, and it was found that the thermal stability of the respective metal sulfates played an important role in the combustions of methane in the presence of SO2. At 500 degreesC, CO2(SO4)(3) and CuSO4 are stable but Cr-2 (SO4)(3) can decompose, therefore, during the reaction in 200 x 10(-6)(phi) SO2, SnCrO sample only adsorbs a small amount of SO42- ions on its surface and the activity remains almost unchanged, which is the reason for the highest resistance of SnCrO sample to sulphur poisoning.
Keywords
sulphur poisoning; methane combustion; tin dioxide
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