凹凸棒石烟气脱汞吸附剂的研究进展

doi:10.16085/j.issn.1000-6613.2017-0406

摘要/Abstract

摘要： 吸附剂喷射法是目前脱除燃煤烟气中单质汞（Hg⁰）的有效方法之一，其关键问题是吸附剂。凹凸棒石不仅结构独特、性能优越、价廉易得、不污染环境，而且经过适当的改性处理后表现出良好的脱汞性能，具有工业应用前景。本文介绍了凹凸棒石的吸附特性及其在燃煤烟气汞脱除中的应用进展。总结了天然凹凸棒石和改性凹凸棒石吸附剂的汞脱除效果以及采用的改性剂和改性方法，分析了此类吸附剂的脱汞机理，同时还讨论了烟气组分、吸附反应温度和吸附剂用量对吸附剂脱汞性能的影响，最后指出在下一步研究中应进一步开发性能更优、更具稳定性的有机无机复合改性吸附剂，同时更加深入地分析其脱汞机理，争取早日实现工业应用。

关键词: 凹凸棒石, 吸附剂, 吸附, 脱汞, 改性

Abstract: Injection is one of the effective ways to remove elemental mercury(Hg⁰)from coal-fired flue gas,and the key is the absorbent. Due to its many advantages of unique structure,superior performance,low cost,easy availability,and environmental friendliness etc.,attapulgite (ATP) is commonly used as absorbent. What's more,appropriately modified attapulgite exhibits excellent mercury removal performance,which endows it good prospects for industrial application. In this paper,adsorption characteristics of attapulgite and its application progress in Hg⁰ removal from flue gases were presented. Mercury removal performances of natural ATP and modified ATP,together with modifiers and the modification methods were summarized,then the mercury removal mechanism of such absorbents was analyzed. Meanwhile,the effects of flue gas components,adsorption temperature and amount of absorbent on mercury removal efficiency were discussed. Finally,we pointed out that further research should focus on the development of organic-inorganic composite modified absorbents with outstanding performance and good stability. Meanwhile,the mercury removal mechanism should be further studied in order to realize its industrial application.

Key words: attapulgite, absorbent, adsorption, mercury removal, modification

中图分类号:

TQ424

左海清, 徐东耀, 但海均, 刘向辉, 杨永利, 刘伟, 马妍. 凹凸棒石烟气脱汞吸附剂的研究进展[J]. 化工进展, 2017, 36(10): 3533-3539.

ZUO Haiqing, XU Dongyao, DAN Haijun, LIU Xianghui, YANG Yongli, LIU Wei, MA Yan. Research progress in attapulgite absorbents for mercury removal from flue gases[J]. Chemical Industry and Engineering Progress, 2017, 36(10): 3533-3539.

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