A review on oxidation of elemental mercury from coal-fired flue gas with selective catalytic reduction catalysts
A review on oxidation of elemental mercury from coal-fired flue gas with selective catalytic reduction catalysts
复制标题
选择性催化还原催化剂氧化燃煤烟气中元素汞的研究进展
DOI：
10.1039/c5cy00219b
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发表时间：
2015
影响因子：
5
通讯作者：
Xie Yin'e
中科院分区：
文献类型：
--
作者：
Zhao Lingkui;Li Caiting;Zhang Xunan;Zeng Guangming;Zhang Jie;Xie Yin'e
在从燃煤烟道气中去除元素汞(Hg0)方面，催化技术提供了一种更环保、更经济的选择。然而，开发新型高效的Hg0氧化催化剂仍然是一个挑战。综述了在NOx选择性催化还原(SCR)催化剂上发展起来的一种新型催化剂对Hg0的催化氧化反应。综述了贵金属催化剂和非贵金属催化剂在汞氧化反应中的应用。还概述了燃煤烟气中汞的排放，包括汞的转化和形态。考察了汞氧化的可能机理和动力学、空速以及烟气组分对催化剂活性和稳定性的影响。我们期望这项工作将为烟气中汞氧化技术的发展提供理论基础。
Catalytic technologies present a more environmentally and financially sound option in the removal of elemental mercury (Hg0) from coal-fired flue gas. However, developing novel and efficient catalysts for Hg0 oxidation is still a challenge. This paper reviews the catalytic oxidation of Hg0 over a new kind of catalysts which were developed from selective catalytic reduction (SCR) catalysts of NOx. In this review, both noble metal catalysts and non-noble metal catalysts for Hg0 oxidation were summarized. An overview of mercury emissions including transformation and speciation of mercury in coal-fired flue gas was also presented. The possible mechanisms and kinetics of mercury oxidation, space velocity and the effects of flue gas components on activity and stability of the catalysts were examined. We expect that this work will serve as a theoretical underpinning for the development of Hg0 oxidation technology in flue gas.