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凹凸棒石负载CuO催化剂脱除气态Hg0

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王钧伟, 张庆平, 沈园园, 董彦杰, 张先龙, 秦伟, 张元广. 凹凸棒石负载CuO催化剂脱除气态Hg0[J]. 环境化学, 2017, 36(5): 1097-1103. doi: 10.7524/j.issn.0254-6108.2017.05.2016112602
引用本文: 王钧伟, 张庆平, 沈园园, 董彦杰, 张先龙, 秦伟, 张元广. 凹凸棒石负载CuO催化剂脱除气态Hg0[J]. 环境化学, 2017, 36(5): 1097-1103. doi: 10.7524/j.issn.0254-6108.2017.05.2016112602
shu
WANG Junwei, ZHANG Qingping, SHEN Yuanyuan, DONG Yanjie, ZHANG Xianlong, QIN Wei, ZHANG Yuanguang. Removal of vapor-phase Hg0 over a CuO/PG catalyst[J]. Environmental Chemistry, 2017, 36(5): 1097-1103. doi: 10.7524/j.issn.0254-6108.2017.05.2016112602
Citation: WANG Junwei, ZHANG Qingping, SHEN Yuanyuan, DONG Yanjie, ZHANG Xianlong, QIN Wei, ZHANG Yuanguang. Removal of vapor-phase Hg0 over a CuO/PG catalyst[J]. Environmental Chemistry, 2017, 36(5): 1097-1103. doi: 10.7524/j.issn.0254-6108.2017.05.2016112602
shu

凹凸棒石负载CuO催化剂脱除气态Hg0

  • 1.

    安庆师范大学化学化工学院, 光电磁功能材料安徽省重点实验室, 安庆, 246011;

  • 2.

    合肥工业大学化学与化工学院, 合肥, 230009

  • 基金项目:

    国家自然科学基金（21203003，51404014，21371009），安徽省自然科学基金（1708085MB49）和安徽省高校优秀青年人才支持计划（gxyqZD2017062）资助

Removal of vapor-phase Hg0 over a CuO/PG catalyst

  • 1.

    College of Chemistry and Chemical Engineering, Anhui Key Laboratory of Functional Coordination Compounds, Anqing Normal University, Anqing, 246011, China;

  • 2.

    School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, China

  • Fund Project: Supported by the National Natural Science Foundation of China (21203003, 51404014, 21371009), the Anhui Provincial Natural Science Foundation (1708085MB49) and Key Project of Anhui Provincial Outstanding Young Scholars in Colleges and Universities (gxyqZD2017062)

  • 摘要: 利用固定床反应器在模拟烟气条件下研究了凹凸棒石（PG）负载CuO催化剂（CuO/PG）对气态Hg0的脱除.考察了CuO负载量、反应温度、烟气成分、SO2浓度以及空速等对CuO/PG脱除Hg0的影响，并利用逐级化学提取和程序升温脱附实验分析了CuO/PG上吸附Hg的形态.结果表明，CuO/PG对Hg0具有较高的脱除能力，明显高于载体PG，且随CuO负载量的增加而增强（1%—8%）；在150—250 ℃温度范围内，温度升高，CuO/PG对Hg0的脱除能力降低；HCl对CuO/PG脱除Hg0具有显著的促进作用，O2具有促进作用，H2O和SO2具有抑制作用，NO的作用不明显；在6000—15000 h-1空速范围内，空速降低，CuO/PG表现出了更好的脱除Hg0的能力.逐级化学提取和程序升温脱附实验结果证实，CuO/PG对Hg0的脱除是吸附和催化氧化的共同作用，Hg0被氧化为Hg2+的化合物并吸附在CuO/PG上.
    Abstract: Removal of vapor-phase Hg0 over a palygorskite (PG) supported CuO catalyst (CuO/PG) was studied in a fixed-bed reactor in simulated flue gas. The influence of CuO loading, temperature, flue gas components, SO2 concentration and space velocity on Hg0 removal was investigated, and the Hg adsorbed over CuO/PG was also characterized. It was found that CuO/PG catalyst had a much higher Hg0 removal capability than that of PG, which increased with CuO loading (1%—8%). CuO/PG showed a high Hg0 removal capability in the temperature range of 150—250 ℃ and space velocity range of 6000—15000 h-1, and a lower temperature or space velocity was benificial for Hg0 removal. HCl and O2 had a positive effect on Hg0 removal over CuO/PG while SO2 and H2O showed an inhibition effect. Sequential chemical extraction and temperature programmed desorption experiments confirmed that Hg0 removal over CuO/PG was the combined effect of oxidation and adsorption, in which the catalytic oxidation activity of CuO played a crucial role.
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  • 收稿日期:  2016-11-26
  • 刊出日期:  2017-05-15
王钧伟, 张庆平, 沈园园, 董彦杰, 张先龙, 秦伟, 张元广. 凹凸棒石负载CuO催化剂脱除气态Hg0[J]. 环境化学, 2017, 36(5): 1097-1103. doi: 10.7524/j.issn.0254-6108.2017.05.2016112602
引用本文: 王钧伟, 张庆平, 沈园园, 董彦杰, 张先龙, 秦伟, 张元广. 凹凸棒石负载CuO催化剂脱除气态Hg0[J]. 环境化学, 2017, 36(5): 1097-1103. doi: 10.7524/j.issn.0254-6108.2017.05.2016112602
shu
WANG Junwei, ZHANG Qingping, SHEN Yuanyuan, DONG Yanjie, ZHANG Xianlong, QIN Wei, ZHANG Yuanguang. Removal of vapor-phase Hg0 over a CuO/PG catalyst[J]. Environmental Chemistry, 2017, 36(5): 1097-1103. doi: 10.7524/j.issn.0254-6108.2017.05.2016112602
Citation: WANG Junwei, ZHANG Qingping, SHEN Yuanyuan, DONG Yanjie, ZHANG Xianlong, QIN Wei, ZHANG Yuanguang. Removal of vapor-phase Hg0 over a CuO/PG catalyst[J]. Environmental Chemistry, 2017, 36(5): 1097-1103. doi: 10.7524/j.issn.0254-6108.2017.05.2016112602
shu

凹凸棒石负载CuO催化剂脱除气态Hg0

  • 1.  安庆师范大学化学化工学院, 光电磁功能材料安徽省重点实验室, 安庆, 246011;
  • 2.  合肥工业大学化学与化工学院, 合肥, 230009
  • 收稿日期:  2016-11-26
基金项目:

国家自然科学基金（21203003，51404014，21371009），安徽省自然科学基金（1708085MB49）和安徽省高校优秀青年人才支持计划（gxyqZD2017062）资助

摘要: 利用固定床反应器在模拟烟气条件下研究了凹凸棒石（PG）负载CuO催化剂（CuO/PG）对气态Hg0的脱除.考察了CuO负载量、反应温度、烟气成分、SO2浓度以及空速等对CuO/PG脱除Hg0的影响，并利用逐级化学提取和程序升温脱附实验分析了CuO/PG上吸附Hg的形态.结果表明，CuO/PG对Hg0具有较高的脱除能力，明显高于载体PG，且随CuO负载量的增加而增强（1%—8%）；在150—250 ℃温度范围内，温度升高，CuO/PG对Hg0的脱除能力降低；HCl对CuO/PG脱除Hg0具有显著的促进作用，O2具有促进作用，H2O和SO2具有抑制作用，NO的作用不明显；在6000—15000 h-1空速范围内，空速降低，CuO/PG表现出了更好的脱除Hg0的能力.逐级化学提取和程序升温脱附实验结果证实，CuO/PG对Hg0的脱除是吸附和催化氧化的共同作用，Hg0被氧化为Hg2+的化合物并吸附在CuO/PG上.

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