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Fe2O3/AC脱除煤气中的Hg0

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白国梁, 蔡思敏, 毛德棋, 王钧伟, 张建利, 秦伟, 董彦杰, 崔晓峰. Fe2O3/AC脱除煤气中的Hg0[J]. 环境化学, 2020, (4): 1145-1152. doi: 10.7524/j.issn.0254-6108.2019032703
引用本文: 白国梁, 蔡思敏, 毛德棋, 王钧伟, 张建利, 秦伟, 董彦杰, 崔晓峰. Fe2O3/AC脱除煤气中的Hg0[J]. 环境化学, 2020, (4): 1145-1152. doi: 10.7524/j.issn.0254-6108.2019032703
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BAI Guoliang, CAI Simin, MAO Deqi, WANG Junwei, ZHANG Jianli, QIN Wei, DONG Yanjie, CUI Xiaofeng. Removal of Hg0 in coal-derived syngas by a Fe2O3/AC catalyst[J]. Environmental Chemistry, 2020, (4): 1145-1152. doi: 10.7524/j.issn.0254-6108.2019032703
Citation: BAI Guoliang, CAI Simin, MAO Deqi, WANG Junwei, ZHANG Jianli, QIN Wei, DONG Yanjie, CUI Xiaofeng. Removal of Hg0 in coal-derived syngas by a Fe2O3/AC catalyst[J]. Environmental Chemistry, 2020, (4): 1145-1152. doi: 10.7524/j.issn.0254-6108.2019032703
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Fe2O3/AC脱除煤气中的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. 省部共建煤炭高效利用与绿色化工国家重点实验室(宁夏大学), 银川, 750021

    • 通讯作者: 王钧伟, E-mail: wangjunweilotus@163.com ; 
  • 基金项目:

    国家自然科学基金（21203003，51404014），安徽省自然科学基金面上项目（1708085MB49），安徽省高校优秀青年人才支持计划重点项目（gxyqZD2017062）和省部共建煤炭高效利用与绿色化工国家重点实验室开放课题（2018-K34）资助.

Removal of Hg0 in coal-derived syngas by a Fe2O3/AC catalyst

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

  • 2. State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan, 750021, China

    • Corresponding author: WANG Junwei, wangjunweilotus@163.com ; 
  • Fund Project: Supported by the National Natural Science Foundation of China (21203003, 51404014), the Anhui Provincial Natural Science Foundation (1708085MB49), Key Project of Anhui Provincial Outstanding Young Scholars in Colleges and Universities (gxyqZD2017062) and Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (2018-K34).

  • 摘要: 利用固定床反应器在模拟煤气条件下研究了活性焦（AC）负载Fe2O3催化剂 （Fe2O3/AC）对气态Hg0的脱除，考察了Fe2O3负载、煅烧温度、空速、Hg0浓度、H2S等对Fe2O3/AC催化剂脱除Hg0的影响及Fe2O3/AC催化剂的再生性能，采用扫描电镜（SEM）表征了Fe2O3在Fe2O3/AC上的分布状态.结果表明，Fe2O3/AC具有较高的脱除Hg0能力，明显高于载体AC，主要缘于Fe2O3对Hg0的催化氧化作用.Fe2O3/AC催化剂上负载的活性组分Fe2O3并不是均匀的分布在载体AC表面上，而是成块簇状分布状态.300 ℃煅烧温度下制备的Fe2O3/AC催化剂脱除Hg0的能力最高.在5000—15000 h-1的空速和21—200 μg·m-3的Hg0浓度范围内，Fe2O3/AC催化剂具有良好的脱除Hg0的能力.H2S与Hg0在Fe2O3活性位上存在竞争吸附、反应会降低Fe2O3/AC对Hg0的脱除能力，但H2S反应生成的单质S和FeSx又可促进Hg0的脱除.脱除Hg0后的Fe2O3/AC催化剂可进行再生，再生后Fe2O3/AC仍具有良好的脱除Hg0的能力.
    Abstract: An activated coke (AC) supported Fe2O3 catalyst (Fe2O3/AC) was prepared and used to remove Hg0 in a fixed-bed reactor in simulated syngas. The effects of Fe2O3 loading, calcination temperature, space velocity, Hg0 concentration and H2S on Hg0 removal by the catalyst were studied, as well as the regeneration of the used Fe2O3/AC catalyst after Hg0 removal. Scanning electron microscopy (SEM) was used to characterize the distribution of Fe2O3 on the catalyst. The results showed that Fe2O3/AC catalyst had a much higher Hg0 removal capability than that of AC, which was mainly due to the catalytic oxidation of Hg0 by Fe2O3. SEM analysis indicated that Fe2O3 distributed heterogeneously on the surface of AC and was in a cluster-like distribution state. Calcination temperature had a slight effect on Hg0 removal capability and the Fe2O3/AC calcinated at 300 ℃ had the highest Hg0 removal capability. In the space velocity range of 5000—15000 h-1 and Hg0 concentration range of 21—200 μg·m-3, Fe2O3/AC had a high Hg0 removal capability. H2S and Hg0 displayed competitive adsorption and reaction on the active sites of Fe2O3, which could reduce Hg0 removal capability of Fe2O3/AC. Meanwhile, elemental S and FeS<i>x produced by the H2S reaction on Fe2O3/AC could promote Hg0 removal. The used Fe2O3/AC catalyst after Hg0 removal could be regenerated and most of its capability for Hg0 removal could be recovered, which was slightly lower than that of the fresh Fe2O3/AC catalyst but much higher than that of AC.
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  • 收稿日期:  2019-03-27

Fe2O3/AC脱除煤气中的Hg0

    通讯作者: 王钧伟, E-mail: wangjunweilotus@163.com ; 
  • 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. 省部共建煤炭高效利用与绿色化工国家重点实验室(宁夏大学), 银川, 750021
  • 收稿日期:  2019-03-27
基金项目:

国家自然科学基金（21203003，51404014），安徽省自然科学基金面上项目（1708085MB49），安徽省高校优秀青年人才支持计划重点项目（gxyqZD2017062）和省部共建煤炭高效利用与绿色化工国家重点实验室开放课题（2018-K34）资助.

摘要: 利用固定床反应器在模拟煤气条件下研究了活性焦（AC）负载Fe2O3催化剂 （Fe2O3/AC）对气态Hg0的脱除，考察了Fe2O3负载、煅烧温度、空速、Hg0浓度、H2S等对Fe2O3/AC催化剂脱除Hg0的影响及Fe2O3/AC催化剂的再生性能，采用扫描电镜（SEM）表征了Fe2O3在Fe2O3/AC上的分布状态.结果表明，Fe2O3/AC具有较高的脱除Hg0能力，明显高于载体AC，主要缘于Fe2O3对Hg0的催化氧化作用.Fe2O3/AC催化剂上负载的活性组分Fe2O3并不是均匀的分布在载体AC表面上，而是成块簇状分布状态.300 ℃煅烧温度下制备的Fe2O3/AC催化剂脱除Hg0的能力最高.在5000—15000 h-1的空速和21—200 μg·m-3的Hg0浓度范围内，Fe2O3/AC催化剂具有良好的脱除Hg0的能力.H2S与Hg0在Fe2O3活性位上存在竞争吸附、反应会降低Fe2O3/AC对Hg0的脱除能力，但H2S反应生成的单质S和FeSx又可促进Hg0的脱除.脱除Hg0后的Fe2O3/AC催化剂可进行再生，再生后Fe2O3/AC仍具有良好的脱除Hg0的能力.

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