Simulation of mercury capture by sorbent injection using a simplified model.
Simulation of mercury capture by sorbent injection using a simplified model.
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DOI：
10.1016/j.jhazmat.2009.05.095
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发表时间：
2009-10
影响因子：
13.6
通讯作者：
Bingtao Zhao;Zhong-xiao Zhang;Jing Jin;W. Pan
中科院分区：
文献类型：
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作者：
Bingtao Zhao;Zhong-xiao Zhang;Jing Jin;W. Pan
化石燃料燃烧或固体废物焚烧造成的汞污染正成为全球关注的环境问题。粉末吸附剂喷射(PSI)作为一种有效的控制技术，已成功地应用于烟气汞的捕集，具有成本低、操作简单等优点。为了更方便地预测PSI的汞捕集效率，本文基于传质理论、等温吸附理论和质量平衡理论，建立了一个简化的模型。该模型的理论计算结果与Meserole等人的实验结果进行了比较。书名/作者：Readers of Installation：[F·B·Meserole，R.Chang，T.R.Carrey，J.Machac，C.F.J.Richardson，Modeling by Absorant Injection，J.Air Waste Management]。阿索克。49(1999)694-704]证明简化模型能够提供良好的预测精度。此外，还比较和评价了传质系数、吸附剂浓度、吸附剂物性和吸附剂吸附容量等关键参数对汞吸附效率的影响。最后，对影响因素进行了敏感性分析，结果表明，注入浓度对汞捕集效率影响最大。
Mercury pollution by fossil fuel combustion or solid waste incineration is becoming the worldwide environmental concern. As an effective control technology, powdered sorbent injection (PSI) has been successfully used for mercury capture from flue gas with advantages of low cost and easy operation. In order to predict the mercury capture efficiency for PSI more conveniently, a simplified model, which is based on the theory of mass transfer, isothermal adsorption and mass balance, is developed in this paper. The comparisons between theoretical results of this model and experimental results by Meserole et al. [F.B. Meserole, R. Chang, T.R. Carrey, J. Machac, C.F.J. Richardson, Modeling mercury removal by sorbent injection, J. Air Waste Manage. Assoc. 49 (1999) 694–704] demonstrate that the simplified model is able to provide good predictive accuracy. Moreover, the effects of key parameters including the mass transfer coefficient, sorbent concentration, sorbent physical property and sorbent adsorption capacity on mercury adsorption efficiency are compared and evaluated. Finally, the sensitive analysis of impact factor indicates that the injected sorbent concentration plays most important role for mercury capture efficiency.