期刊
APPLIED CLAY SCIENCE
卷 56, 期 -, 页码 84-89出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.clay.2011.11.026
关键词
Carbonyl sulfide; Hydrolysis; Hydrotalcite-like compounds; Mixed oxides
资金
- National Natural Science Foundation [50908110]
- China Postdoctoral Science Foundation [20090451431]
- Young and Middle-aged Academic and Technical Back-up Personnel Program of Yunnan Province [2007PY01-10]
- National Undergraduate Innovational Experimentation Program [101067425]
A series of Zn, Ni and Fe containing hydrotalcite-like compounds with various M2+/M3+ ratios were synthesized by co-precipitation method at pH=10. The products were characterized by XRD, SEM, TG-DTA, FTIR, CO2-TPD and N-2 adsorption/desorption techniques. The results showed that M2+/M3+ ratio affected the formation of hydrotalcite crystal seriously. The precursors with M2+/M3+ mole ratio of 2 and 3 showed pure hydrotalcite phase. After calcination at 250 degrees C, the derived oxides with larger surface area and more basic sites were obtained. Desulfurization tests showed that the Zn-Ni-Fe hydrotalcite-derived oxide exhibited an excellent activity in low temperature hydrolysis of COS. The optimum M2+/M3+ mole ratio was 3. (C) 2011 Elsevier B.V. All rights reserved.
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