Gaseous Arsenic Capture in Flue Gas by CuCl2-Modified Halloysite Nanotube Composites with High-Temperature NOx and SOx Resistance
文献类型：期刊论文
| 作者 | Duan, Xue-Lei; Yuan, Chun-Gang; He, Kai-Qang; Yu, Jie-Xuan; Jiang, Yang-Hong; Guo, Qi; Li, Yan ; Yu, Su-Juan; Liu, Jing-Fu
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| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
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| 出版日期 | 2022-04-05 |
| 卷号 | 56期号:7页码:4507-4517 |
| 关键词 | ACTIVATED CARBON REMOVAL ADSORPTION COPPER MECHANISM OXIDATION PHASE REGENERATION SPECIATION EMISSIONS |
| ISSN号 | 0013-936X |
| 英文摘要 | Gaseous arsenic emitted from coal combustion flue gas (CCFG) causes not only severe contamination of the environment but also the failure of selective catalytic reduction (SCR) catalysts in power plants. Development of inexpensive and effective adsorbents or techniques for the removal of arsenic from high-temperature CCFG is crucial. In this study, halloysite nanotubes (HNTs) at low price were modified with CuCl2 (CuCl2-HNTs) through ultrasound assistance and applied for capturing As2O3(g) in simulated flue gas (SFG). Experiments on arsenic adsorption performance, adsorption mechanism, and adsorption energy based on density functional theory were performed. Modification with CuCl2 clearly enhanced the arsenic uptake capacity (approximately 12.3 mg/g) at 600 degrees C for SFG. The adsorbent exhibited favorable tolerance to high concentrations of NOx and SOx. The As2O3(III) was oxidized and transformed into As2O3(V) on the CuCl2-HNTs. The Al-O bridge had the highest adsorption energy for the O end of the As-O group (-2.986 eV), and the combination formed between arsenic-containing groups and aluminum was stable. In addition, the captured arsenic could be stabilized in the sorbent at high temperature, making it possible to use the sorbent before the SCR system. This demonstrates that CuCl2-HNTs is a promising sorbent for arsenic oxidation and removal from CCFG. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47539]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 2.North China Elect Power Univ, Coll Environm Sci & Engn, MOE Key Lab Resources & Environm Syst Optimizat, Beijing 102206, Peoples R China 3.North China Elect Power Univ, Dept Environm Sci & Engn, Hebei Key Lab Power Plant Flue Gas Multipollutant, Baoding 071000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Duan, Xue-Lei,Yuan, Chun-Gang,He, Kai-Qang,et al. Gaseous Arsenic Capture in Flue Gas by CuCl2-Modified Halloysite Nanotube Composites with High-Temperature NOx and SOx Resistance[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022,56(7):4507-4517. |
| APA | Duan, Xue-Lei.,Yuan, Chun-Gang.,He, Kai-Qang.,Yu, Jie-Xuan.,Jiang, Yang-Hong.,...&Liu, Jing-Fu.(2022).Gaseous Arsenic Capture in Flue Gas by CuCl2-Modified Halloysite Nanotube Composites with High-Temperature NOx and SOx Resistance.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56(7),4507-4517. |
| MLA | Duan, Xue-Lei,et al."Gaseous Arsenic Capture in Flue Gas by CuCl2-Modified Halloysite Nanotube Composites with High-Temperature NOx and SOx Resistance".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56.7(2022):4507-4517. |
入库方式： OAI收割
来源：生态环境研究中心
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