A new adsorption process for flue gas NOx purification and recovery

被引：0
|
作者：
You Y. [1 ]
Liu Y. [1 ]
Yang X. [1 ]
Wu X. [1 ]
Zhao C. [1 ]
Wang Z. [1 ]
Hou H. [2 ]
Li Z. [1 ]
机构：
[1] School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing
[2] HBIS Technology Research Institute, Shijiazhuang
来源：
Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 04期
关键词：
Adsorption; Flue gas purification; Nitrogen oxide; Recovery; Regeneration;
D O I：
10.11949/0438-1157.20200899
中图分类号：
学科分类号：
摘要：
Reasonable and efficient adsorption process is the key process link that determines the industrial feasibility of the adsorption method to purify and recover NOx in flue gas. In this paper, a novel adsorption process (GVTSA) with NOx desorption using multiple hot gas circulations (GC) within the enclosed fixed bed through extra gas replenishment was proposed. Based on Na-ZSM-5 zeolites as sorbents, experimental studies on NOx adsorption and recycling from desulfurized iron-ore sintering flue gas of a steel plant were conducted. The results show that the GVTSA obtained a higher NOx recovery compared with traditional adsorption processes (e.g. TSA, VSA), reaching 90% under the optimal conditions (220℃, -50 kPa). The concentration of desorbed NO2 was more than 2%, significantly enhanced from merely 36 mg•m-3 in the feed gas. The NOx cyclic adsorption capacity reached 0.10 mmol•g-1 for up to 16 cycles. This work can provide references for industrial engineering application of flue gas ultra-low emission control and resource utilization. © 2021, Editorial Board of CIESC Journal. All right reserved.
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页码：2132 / 2138
页数：6
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