留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

改性褐煤半焦的表面性质及对气态Hg0的吸附特性

王 力 陈继涛 张华伟 张林林 刘秀丽

王 力, 陈继涛, 张华伟, 张林林, 刘秀丽. 改性褐煤半焦的表面性质及对气态Hg0的吸附特性[J]. 环境科学研究, 2014, 27(8): 820-826.
引用本文: 王 力, 陈继涛, 张华伟, 张林林, 刘秀丽. 改性褐煤半焦的表面性质及对气态Hg0的吸附特性[J]. 环境科学研究, 2014, 27(8): 820-826.
WANG Li, CHEN Ji-tao, ZHANG Hua-wei, ZHANG Lin-lin, LIU Xiu-li. Study on Surface Properties and Adsorption Performance of Modified Semi-Coke for Gas-Phase Hg0[J]. Research of Environmental Sciences, 2014, 27(8): 820-826.
Citation: WANG Li, CHEN Ji-tao, ZHANG Hua-wei, ZHANG Lin-lin, LIU Xiu-li. Study on Surface Properties and Adsorption Performance of Modified Semi-Coke for Gas-Phase Hg0[J]. Research of Environmental Sciences, 2014, 27(8): 820-826.

改性褐煤半焦的表面性质及对气态Hg0的吸附特性

基金项目: 国家自然科学基金项目(21276146)

Study on Surface Properties and Adsorption Performance of Modified Semi-Coke for Gas-Phase Hg0

  • 摘要: 以廉价的褐煤为原料制备褐煤原料半焦,通过化学改性研制脱除烟气中气态Hg0的改性半焦(MnOx/褐煤半焦)吸附剂,运用N2吸附-脱附、SEM(扫描电镜)、XRD(X射线衍射仪)及XPS(X射线光电子能谱)等对吸附剂的表面特性进行表征与分析,利用固定床吸附试验考察2种吸附剂对气态Hg0的吸附特性. 结果表明:原料半焦与改性半焦均具有较发达的孔隙结构,并且以2~5 nm的介孔结构为主;经化学改性后,半焦表面石墨化程度有所提高,石墨碳C─C所占比例由51.37%增至76.17%;MnOx主要以高度分散的无定形状态均匀分布于改性半焦表面. 固定床吸附试验结果表明,温度为140 ℃时,原料半焦对气态Hg0的吸附性能较差,而改性半焦则表现良好,其最高吸附效率可达85.6%;初始ρ(Hg0)分别为10.1、20.3、30.0、40.6 μg/m3时,改性半焦的吸附性能随初始ρ(Hg0)升高而增强;当吸附温度由30 ℃升至140 ℃时,改性半焦的吸附性能也随着吸附温度的升高而增强. 改性半焦对气态Hg0的吸附作用应主要为化学吸附,被吸附后的汞主要以氧化态(Hg2+)形式存在.

     

  • [1] PACYNA E G,PACYNA J M,SUNDSETH K,et al.Global emission of mercury to the atmosphere from anthropogenic sources in 2005 and projections to 2020.Atmos Environ,2010,4(20):2487-2499.
    [2] 易凤姣,姜霞,金兰淑,等.HgC12对太湖不同季节优势藻生长的影响.环境科学研究,2013,6(6):606-611.YI Fengjiao,JIANG Xia,JIN Lanshu,et al.Effects of HgCl2 on growth of dominant algae of Taihu Lake in different seasons.Research of Environmental Sciences,2013,6(6):606-611.
    [3] 张华伟,陈继涛,王力,等.燃煤烟气中气态Hg0污染物吸附剂的研究进展.环境化学,2011,0(10):1805-1813.ZHANG Huawei,CHEN Jitao,WANG Li,et al.Research progress on so sorbents for removal of gas-phase Hg0 pollutant in coal-fired flue gas.Environmental Chemistry,2011,0(10):1805-1813.
    [4] YANG Hongqun,XU Zhenghe,FAN Maohong,et al.Adsorbents for capturing mercury in coal-fired boiler flue gas.J Hazard Mater,2007,6(1/2):1-11.
    [5] 张成,杨永奎,王定勇.重庆大气汞人为排放及其预测.环境科学研究,2011,4(8):904-908.ZHANG Cheng,YANG Yongkui,WANG Dingyong.Estimation and prediction of atmospheric mercury emissions from anthropogenic sources in Chongqing.Research of Environmental Sciences,2011,4(8):904-908.
    [6] ZAHIR F,RIZWI S J,HAQ S K,et al.Low dose mercury toxicity and human health.Environmental Toxicology and Pharmacology,2005,0(2):351-360.
    [7] COUNTER S A,BUCHANAN L H.Mercury exposure in children:a review.Toxicology and Applied Pharmacology,2004,8(2):209-230.
    [8] 郑徽,金银龙.汞的毒效应及作用机制研究进展.卫生研究,2006,5(5):663-666.ZHENG Hui,JIN Yinlong.Toxic effects and the mechanism of mercury on health.Journal of Hygiene Research,2006,5(5):663-666.
    [9] PAVLISH J H,SONDREAL E A,MAN M D,et al.Status review of mercury control options for coal-fired power plants.Fuel Processing Technology,2003,2(2/3):89-165.
    [10] ZHAO Pengfei,GUO Xin,ZHENG Chuguang.Removal of elemental mercury by iodine-modified rice husk ash sorbents.J Environ Sci,2010,2(10):1629-1636.
    [11] 徐晓亮,代旭东,缪明烽.燃煤烟气汞排放控制技术研究进展.能源环境保护,2012,6(1):1-4.XU Xiaoliang,DAI Xudong,MIAO Mingfeng.Research progress of mercury control technologies for coal-fired flue gas.Energy Environmental Protection,2012,6(1):1-4.
    [12] 韩粉女,钟秦.燃煤烟气脱汞技术的研究进展.化工进展,2011,0(4):878-885.HAN Fennü,ZHONG Qin.Research progress of removal of mercury from coal-fired flue gas.Chemical Industry and Engineering Progress,2011,0(4):878-885.
    [13] 方平,岑超平,陈定盛,等.ZnCl2法污泥含炭吸附剂对模拟烟气中气态汞的吸附.环境工程学报,2009,3(2):311-316.FANG Ping,CEN Chaoping,CHEN Dingsheng,et al.Hg vapor adsorption of sludge carbon adsorbents made by ZnCl2 chemical activation in simulated flue gas.Chinese Journal of Environmental Engineering,2009,3(2):311-316.
    [14] LEE S H,RHIM Y J,CHO S P,et al.Carbon-based novel sorbent for removing gas-phase mercury.Fuel,2006,5(2):219-226.
    [15] SJOSTROM S,DURHAM M,BUSTARD C J,et al.Activated carbon injection for mercury control:overview.Fuel,2010,9(6):1320-1322.
    [16] 上官炬,李转丽,杨直,等.高温热处理对活性半焦烟气脱硫的影响.太原理工大学学报,2005,6(2):134-136.SHANGGUAN Ju,LI Zhuanli,YANG Zhi,et al.The effect of heating semi-coke at high temperature on its SO2 removal capacity.Journal of Taiyuan University of Technology,2005,6(2):134-136.
    [17] 苏燕,王铎,于淑兰,等.改性半焦处理油田含油废水的研究.水处理技术,2007,3(4):50-52.SU Yan,WANG Duo,YU Shulan,et al.Study of oily wastewater treatment by semi-coke.Technology of Water Treatment, 2007,3(4):50-52.
    [18] ZHANG Huawei,LIU ShanShan,CHEN Jitao,et al.Research on the preparation of silver-loaded semi-coke and its adsorption characteristics to gas-phase Hg0.Advanced Materials Research,2011,6/360:1350-1355.
    [19] SHANGGUAN Ju,LI Chunhu,MIAO Maoqian,et al.Surface characterization and SO2 removal activity of activated semi-coke with heat treatment.New Carbon Mater,2008,3(1):37-43.
    [20] GALBREATH K C,ZYGARLICKE C J.Mercury transformations in coal combustion flue gas.Fuel Processing Technology,2000,5/66:289-310.
    [21] 周思瑶,程斌,莫建松,等.燃煤烟气汞污染控制技术研究进展.环境污染与防治,2011,3(6):76-80.ZHOU Siyao,CHENG Bin,MO Jiansong,et al.Mercury control technology for coal-fired flue gases.Environmental Pollution Control,2011,3(6):76-80.
    [22] WU B C,PETERSON T W,SHADMAN F,et al.Interactions between vapor-phase mercury compounds and coal char in synthetic flue gas.Fuel Processing Technology,2000,3(2/3):93-107.
    [23] 任建莉,周劲松,骆仲泱,等.新型吸附剂脱除烟气中气态汞的试验研究.中国电机工程学报,2007,7(2):48-53.REN Jianli,ZHOU Jinsong,LUO Zhongyang,et al.The application of novel sorbents for mercury vapor removal from simulated flue gases.Proceedings of the CSEE,2007,7(2):48-53.
    [24] KRISHNAN S V,GULLETB K,JOZEWICZ W.Sorption of elemental mercury by activated carbons.Environ Sci Technol,1994,8(3):1506-1512.
    [25] TAN Zengqiang,SUN Lushi,XIANG Jun,et al.Gas-phase elemental mercury removal by novel carbon-based sorbents.Carbon,2012,0(2):362-371.
    [26] WILCOX J,RUPP E,YING S C,et al.Mercury adsorption and oxidation in coal combustion and gasification processes.International Journal of Coal Geology,2012,0/91:4-20.
    [27] HUTSON N D,ATTWOOD B C,SCHECKEL K G.XAS and XPS characterization of mercury binding on brominated activated carbon.Environ Sci Technol,2007,1(5):1747-1752.
    [28] 何胜.燃煤烟气汞催化氧化的试验和机理研究.杭州:浙江大学,2009.HE Sheng.Experimental and mechanism study on catalytic oxidation of mercury from coal-fired flue gas.Hangzhou:Zhejiang University,2009.
    [29] YANG Shijian,GUO Yongfu,YAN Naiqiang,et al.Capture of gaseous elemental mercury from flue gas using a magnetic and sulfur poisoning resistant sorbent Mn/γ-Fe2O3 at lower temperatures.J Hazard Mater,2011,6(1):508-515.
    [30] DRANGA B A,LAZAR L,KOESER H.Oxidation catalysts for elemental mercury in flue gases:a review.Catalysts,2012,2(1):139-170.
    [31] LI Y H,LEE C W,GULLET B K.Importance of activated carbon's oxygen surface functional groups on elemental mercury adsorption.Fuel,2003,2(4):451-457.
  • 加载中
计量
  • 文章访问数:  2123
  • HTML全文浏览量:  24
  • PDF下载量:  241
  • 被引次数: 0
出版历程
  • 收稿日期:  2013-06-17
  • 修回日期:  2014-03-24
  • 刊出日期:  2014-08-25

目录

    /

    返回文章
    返回