The characteristics of CuSnZr catalyst applied to NTP enhanced catalytic desulfurization process
ZHOU Zheng-hua1, JIANG Lian-shuang2, ZHANG Zhen-yu2, HUANG Rui2, NING Jing-yuan3, NING Zhi-yuan2
1. School of Materials and Energy, Yunnan University, Kunming 650000, China; 2. School of Chemical Science and Technology, Yunnan University, Kunming 650000, China; 3. Kunming Zhongkeyun Environmental Protection Co. LTD, Kunming 650000, China
Abstract：In order to efficiently process a large amount of low-concentration electrolytic aluminium flue gas at low temperature, the Sn Zr type metal oxide was prepared by the impregnation method with Cu added as a catalyst, and this desulfurization effect of CuSnZr catalyst was the first time to be tested in low temperature plasma (NTP) technology. The best desulfurization performance results when the catalyst was loaded with 20wt% Cu and when the aging temperature was 40℃. Compared with the fresh catalyst, the X-ray diffraction analysis (XRD) results showed that the discharge basically did not affect the crystal form of the catalyst; the scanning electron microscopy (SEM), nitrogen adsorption and desorption (BET) indicated that the discharge will greatly improve the adsorption capacity, the desorption capacity and the pore structure of the catalyst; X-ray photoelectron spectroscopy (XPS) also showed that the discharge will change the valence state of the elements on the catalyst surface, thereby changing its redox performance and deviating the reaction path. For the catalyst performance analysis, theoretical calculations indicate that the increase in copper content will cause changes in the energy band structure of the catalyst, which is better used for exciting gas.
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