期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 205, 期 -, 页码 35-43出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2017.11.002
关键词
Coal gas purification; Organic sulfur; Hydrotalcite-derived oxides; XAFS; DRIFTS; DFT
资金
- China Postdoctoral Science Foundation [2016M600045]
- Fundamental Research Funds for the Central Universities [FRF-TP-16-060A1]
In this paper, a series of Ni based hydrotalcite-like compounds (HTLCs) were prepared by co-precipitation method. Carbonyl sulfide (COS) removal was investigated over the hydrotalcite-derived oxides (HTO). The properties of desulfurizer and its changes in the desulfurization process were systematically characterized by XRD, SEM, FTIR, CO2-TPD, XPS, XAFS and In-situ DRIFTS. The results showed that the activity series for removal of COS decrease in the following sequence: Ni3A1-HTO > Ni3Fe-HTO > Ni3Cr-HTO. In situ DRIFTS and quantum chemistry study implied that carbonate and sulfate was formed on the desulfurizer surface. Lewis basic sites and hydroxyl was determined to play a pivotal role for the COS removal. The enhanced activity after trivalent cations substitution is attributed to their high ability to provide electrons as evidenced by results of CO2-TPD, XPS and XAFS. This work is useful to explore feasible routes to improve the performance of desulfurization material for the feed gas purification. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据