Simulation of mercury capture by sorbent injection using a simplified model.
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.
Zhao
Bingtao
B
School of Energy and Power Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China. zhaobingtao@usst.edu.cn
Zhang
Zhongxiao
Z
Jin
Jing
J
Pan
Wei-Ping
WP
D000327:Adsorption; D000465:Algorithms; D004058:Diffusion; D004785:Environmental Pollutants / Q000032:analysis*; D004787:Environmental Pollution / Q000517:prevention & control*; D005740:Gases / Q000737:chemistry; D008628:Mercury / Q000737:chemistry*; D008956:Models, Chemical; D015233:Models, Statistical; D010316:Particle Size; D015203:Reproducibility of Results; D013499:Surface Properties; D013816:Thermodynamics
D004785:Environmental Pollutants; D005740:Gases; D008628:Mercury