Performance and kinetics of mercury adsorption over Tai-Xi activated coke

ZHANG Hairu; WU Hao; LIU Hao; WANG Meng; YANG Hongmin

doi:10.3969/j.issn.0438-1157.2013.03.041

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Performance and kinetics of mercury adsorption over Tai-Xi activated coke

更新时间：2025-12-10

- Performance and kinetics of mercury adsorption over Tai-Xi activated coke
- CIESC Journal Issue 3, Pages: 1076-1083(2013)
- 作者机构：
  
  南京师范大学能源与机械工程学院,江苏,南京,210042
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.03.041
  CLC： 701.7
- Online First：05 March 2013，
  
  Published：05 March 2013
- 稿件说明：
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ZHANG Hairu, WU Hao, LIU Hao, et al. Performance and kinetics of mercury adsorption over Tai-Xi activated coke[J]. CIESC Journal, 2013, (3): 1076-1083.
DOI：

ZHANG Hairu, WU Hao, LIU Hao, et al. Performance and kinetics of mercury adsorption over Tai-Xi activated coke[J]. CIESC Journal, 2013, (3): 1076-1083. DOI： 10.3969/j.issn.0438-1157.2013.03.041.

摘要

通过固态吸附剂汞吸附效能测定系统进行了太西活性焦吸附单质汞的实验

考察单质汞Hg0入口浓度和温度对太西活性焦脱汞性能的影响并探讨了吸附机理。结果表明:在CO2/N2/O2/NO/Hg0体系中

不同Hg0入口浓度获得的汞脱除效率曲线相似

脱除效率随Hg0入口浓度增大而增加;变入口浓度工况下

汞的吸附全过程遵循准二级动力学反应模型

该吸附过程以化学吸附为主;在反应温度从403 K升高到423 K的过程中

系统发生了化学吸附或者化学反应

423 K可作为活性焦的最佳除汞温度;Bangham方程可对变温工况下活性焦脱除单质汞的吸附过程进行准确描述

并获得不同温度下活性焦脱汞的吸附速率常数存在k423K>k463K>k403K的关系。

Abstract

The tests of mercury adsorption on Tai-Xi activated coke were conducted in an adsorption system of fixed-bed reactor.The effect of inlet mercury concentration and temperature on adsorption efficiency(removal of mercury)was studied using a simulated flue gas that was prepared by mixing flue gas component CO2

NO and Hg0 vapors came from a permeation tube.The results show that there is similar shape of adsorption curve for different initial mercury concentrations and efficiency of mercury removal increases with increase of inlet mercury concentration.The initial port of breakthrough curve shows that the adsorption rate is rapid

then slow and slow until to adsorption saturation.The uptake process of mercury by activated coke can be well fitted by a pseudo-second order kinetics model

indicating that for CO2/N2/O2/NO/Hg0 system

the adsorption of mercury on the activated coke takes mainly place by chemical adsorption or chemical reaction.The optimal temperature is 423 K for the best mercury removal.The Bangham equation can be applied to describe the adsorption behavior at different operation temperature

and the adsorption rate constants at different temperature follow as k423K>k463K>k403K.

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