活性炭孔隙结构对催化氧化脱除单质汞的影响

张郃; 赵建涛; 房倚天; 王洋

活性炭孔隙结构对催化氧化脱除单质汞的影响

张郃^1,2,
赵建涛^2,,
房倚天²,
王洋²

1.
太原工业学院, 山西太原 030008;
2.
中国科学院山西煤炭化学研究所, 山西太原 030001

基金项目: 国家自然科学基金(20706055); 山西省高等学校科技创新项目(2013161)。

详细信息

通讯作者:
赵建涛,Tel:0351-2021137,Fax:0351-2021137,E-mail:zhaojt@sxicc.ac.cn。

中图分类号: X701.3
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- 文章访问数: 400
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- 被引次数: 0
出版历程
- 收稿日期: 2014-09-13
- 刊出日期: 2015-03-30

Role of activated carbon structures in catalytic oxidation adsorption for mercury

1.
Taiyuan Institute of Technology, Taiyuan 030008, China;
2.
Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

摘要

摘要: 研究活性炭在硫化氢存在条件下催化氧化脱除煤气中单质汞的吸附机理和探讨提高其吸附能力的方法,在模拟煤气气氛下对3种活性炭和一种活性焦进行汞的吸附性能实验,并进一步分析活性炭(焦)的孔隙结构。用BET方程处理N₂等温吸附数据,计算比表面积;用HK法进行微孔分析;用BJH法计算中孔孔径分布。结果表明,硫化氢被催化氧化后,生成吸附在活性炭孔壁上的活性硫促进了对汞的吸附;随着活性炭微孔和中孔体积的增大,活性炭对汞的吸附能力得到提高。
- 煤气 /
- 活性炭 /
- 脱汞 /
- 孔隙结构
Abstract: The Hg⁰ catalytic oxidation and adsorption capabilities of 3 activated carbons (ACs) and one active coke were evaluated in a simulated coal-derived atmosphere containing hydrogen sulfide (H₂S) and oxygen (O₂). The examined adsorbent properties that may affect adsorption capacity are pore structure and the presence of sulfur on surface of ACs. N₂ isothermal absorption data was treated by BET equation and to calculate the special surface area. The absorption data was settled by HK method to obtain the micro porous structure. The medium pore diameter distribution was calculated by BJH method. The results reveal that with the increasing of micro pore and medium pore volume, Hg⁰ adsorptive capacity of activated carbons is enhanced. In all cases, Hg⁰ removal efficiency increases with sulfur addition.
- coal-derived gas /
- activated carbon /
- mercury adsorption /
- pore structure

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参考文献(12)

王起超, 沈文国, 麻壮伟. 中国燃煤汞排放量估算[J]. 中国环境科学, 1999, 19(4): 318-321.(WANG Qi-chao, SHEN Wen-guo, MA Zhuang-wei. The estimation of mercury emission from coal combustion in China[J]. Chin Environ Sci, 1999, 19(4): 318-321.)

张明泉, 朱元成, 邓汝温. 中国燃煤大气排放汞量的估算与评述[J]. AMBIO-人类环境杂志, 2002, 31(6): 482-484.(ZHANG Ming-quan, ZHU Yuan-cheng, DENG Ru-weng. Evaluation of mercury emissions to the atmosphere from coal combustion, China[J]. AMBIO-A J Human Environ, 2002, 31(6): 482-484.)

UDDIN M A, OZAKI M, SASAOKA E, WU S J. Temperature-programmed decomposition desorption of mercury species over activated carbon sorbents for mercury removal from coal-derived fuel gas[J]. Energy Fuels, 2009, 23(10): 4710-4716.

MAROTO V, ZHANG Y, GRANITE E. Effect of porous structure and surface functionality on the mercury capacity of a fly ash carbon and its activated sample[J]. Fuel, 2005, 84(1): 105-108.

任建莉, 周劲松, 骆仲泱, 徐璋, 张雪梅. 钙基类吸附剂脱除烟气中气态汞的试验研究[J]. 燃料化学学报, 2006, 34(5): 557-561.(REN Jian-li, ZHOU Jin-song, LUO Zhong-yang, XU Zhang, ZHANG Xue-mei. Ca-based sorbents for mercury vapor removal from flue gas[J]. J Fuel Chem Technol, 2006, 34(5): 557-561.)

ZHANG H, ZHAO J, FANG Y T, HUANG J J, WANG Y. Catalytic oxidation and stabilized adsorption of elemental mercury from coal-derived fuel gas[J]. Energy Fuels, 2012, 26(3): 1629-1637.

张郃, 赵建涛, 房倚天, 王洋. 活性炭催化氧化脱除单质汞的研究[J]. 燃料化学学报, 2011, 39(5): 373-377.(ZHANG He, ZHAO Jian-tao, FANG Yi-tian, WANG Yang. Stabilized oxidation and adsorption of elemental mercury by activated carbon[J]. J Fuel Chem Technol, 2011, 39(5): 373-377.)

LOPEZ-ANTÓN M A, TASCÓN J M D, MARTÍNEZ-TARAZONZ M R. Retention of mercury in activated carbons in coal combustion and gasification flue gases[J]. Fuel Process Technol, 2002, 77-78: 353-358.

WU X X, KERCHER A K, SCHWARTZ V, OVERBURY S H, ARMSTRONG T R. Activated carbons for selective catalytic oxidation of hydrogen sulfide to sulfur[J]. Carbon, 2005, 43(5): 1087-1090.

张郃, 赵建涛, 方惠斌, 房倚天. 活性炭脱除煤气中H₂S的气氛影响及动力学研究[J]. 煤炭转化, 2010, 33(3): 23-28.(ZHANG He, ZHAO Jian-tao, FANG Hui-bin, FANG Yi-tian. Atmosphere effect and kinetics of removal of H₂S in coal gas with active carbon[J]. Coal Convers, 2010, 33(3): 23-28.)

谭小耀, 吴迪镛, 袁权. 浸渍活性炭脱硫过程中孔结构及气体湿度的影响[J]. 化工学报, 1997, 48(2): 237-240.(TAN Xiao-yao, WU Di-yong, YUAN Quan. Influence of the pore structure and gas humidity on desufurization by impregnated activated carbon[J]. J Chem Ind Eng (China), 1997, 48(2): 237-240.)

邓先伦, 蒋剑春. 除汞载硫活性炭研发[J]. 林产化工通讯, 2004, 38(3): 13-16.(DENG Xian-lun, JIANG Jian-chun. Development of S-loaded activated carbon applied to removal mercury[J]. J Chem Ind Forest Prod, 2004, 38(3): 13-16.)

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