期刊
FUEL PROCESSING TECHNOLOGY
卷 135, 期 -, 页码 125-132出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fuproc.2014.11.038
关键词
Hg removal; Pd/AC sorbents; Coal derived fuel gas; Pretreatment
资金
- National High-tech R & D Program of China [2013AA065404E]
- National Natural Science Foundation of China [21006067, 21276170]
- Shanxi Province Natural Science Foundation [201101008-4]
The Pd supported activated carbon (Pd/AC) sorbents were pretreated by 5 vol.% O-2 or H-2, and the Hg-0 removal efficiency of the corresponding sorbents was compared in different atmospheres. X-ray photoelectron spectroscopy, X-ray diffraction and X-ray absorption spectroscopy were employed to analyze the sorbents at different stages. These results indicated that the Hg-0 removal efficiency of the untreated 1Pd/AC sorbent was higher than that of the pretreated sorbents. The efficiency of Hg removal from coal derived fuel gas is much higher in N-2-H2S-Hg-H-2 atmospheres than that in N-2-H2S-Hg atmospheres and it can be maintained at about 91.4% for 360 min. There exist three types of Pd-0 forms over Pd/AC sorbent, i.e. Pd-0, Pd2+ and Pd2H, and among which Pd is the active species for Hg removal over Pd/AC sorbent H-2 can promote the Hg removal due to the in situ reducing of palladium oxide in the process of sorbent evaluation. H-2 and O-2 in the pretreated atmosphere suppressed the Hg-0 removal due to the formation of inactive palladium hydride and easily sulfidized palladium oxide, respectively, and then the decrease of Pd-0 content. (C) 2014 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