Adsorptive removal of trace NO from a CO2 stream over transition-metal-oxide-modified HZSM-5
发表时间：2019-03-09
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- 论文类型：
- 期刊论文
- 第一作者：
- Chen, Shaoyun
- 通讯作者：
- Guo, XW (reprint author), Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116012, Peoples R China.
- 合写作者：
- Zhang, Yongchun,Guo, Xinwen
- 发表时间：
- 2009-10-15
- 发表刊物：
- SEPARATION AND PURIFICATION TECHNOLOGY
- 收录刊物：
- SCIE、EI、Scopus
- 文献类型：
- J
- 卷号：
- 69
- 期号：
- 3
- 页面范围：
- 288-293
- ISSN号：
- 1383-5866
- 关键字：
- Carbon dioxide; Nitric oxide; Transition-metal; Adsorption; Oxidation; CO2 purification
- 摘要：
- This study investigates the adsorption performance of a number of absorbents prepared by incipient wetness impregnation of 3.85 wt% Fe, Co, Ni, Mn, Co and Ce oxides on HZSM-5 for the removal of trace NO (150-200 ppm) from a CO2 stream to produce food-grade CO2. The adsorbents were characterized using X-ray diffraction, X-ray fluorescence, and N-2 adsorption with their performances evaluated in a fixed-bed flow system. The investigations revealed NO removal of better than 0.1 ppm from the CO2 stream. The breakthrough capacities of the adsorbents for NO removal in the presence Of O-2 were found to significantly increase. The converse was observed in the case of NO adsorption selectivity. Co/HZSM-5(25) was found to be the best adsorbent under all the conditions tested producing CO2 purities of better than 99.9999%. This is significantly higher than for Fe-Mn mixed oxides, claimed to be the best NO adsorbent reported in the literature for CO2 purification. (C) 2009 Elsevier B.V. All rights reserved.
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