期刊
CHEMICAL ENGINEERING JOURNAL
卷 254, 期 -, 页码 82-87出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2014.05.093
关键词
Mercury; Catalyst; HCI; Atomic Cl; Mechanism
资金
- National Basic Research Program (973) of China [2013CB430005]
- National Hi-Tech Research and Development Program (863) of China [2013AA065501, 2011AA060802]
The effect of flue gas components on the Hg-0 oxidation efficiency of CuO/TiO2 and CuCl2/TiO2 catalysts was investigated. The results indicated that HCl and O-2 in the atmosphere positively affect Hg-0 oxidation, and HCl is more effective than O-2. Meanwhile, atomic Cl and O in the catalyst also play crucial roles in the Hg-0 oxidation process. Thermogravimetry (TG), X-ray Diffractograms (XRD), Brunauer-Emmet-Teller (BET) and X-ray photoelectron spectroscopy (XPS) technologies were adopted to characterize the raw CuCl2/Tio(2) catalyst. The Hg-0 oxidation mechanisms over CuO/TiO2 and CuCl2/TiO2 catalysts were discussed. Both HCl and O-2 gases were found to be necessary to revert to CuO or CuCl2 via an intermediate step. The CuCl2/TiO2 catalyst has a potential industrial application because it has a certain oxidation activity in the absence of HCl, high stability and a large temperature window. (C) 2014 Elsevier B.V. All rights reserved.
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