Journal
FUEL
Volume 145, Issue -, Pages 180-188Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2014.12.084
Keywords
Removal of elemental mercury; Fenton-like reagents; Nitric oxide (NO); Sulfur dioxide (SO2)
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Funding
- National Natural Science Foundation of China [51206067]
- National Key Basic Research Program 973 Project of China [2013CB228504]
- Open Research Fund Program of Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education (Southeast University)
- Key Laboratory of Efficient & Clean Energy Utilization, College of Hunan Province (Changsha University of Science Technology)
- Training Project of Jiangsu University Youth Backbone Teacher
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A novel process on oxidation removal of elemental mercury (Hg-0) from flue gas using two Fenton-like reagents in a spray reactor was proposed. The effects of several process parameters such as H2O2 concentration, Fe3+ concentration, Cu2+ concentration, reaction temperature, solution pH, Hg-0 inlet concentration, liquid-gas ratio, NO concentration, SO2 concentration on Hg-0 removal were investigated. Reaction mechanism of Hg-0 removal was investigated. Simultaneous removal of Hg-0, NO and SO2 in flue gas was studied preliminarily. A simple economic estimate for simultaneous removal of Hg-0, SO2 and NO was also carried out. Increasing H2O2 concentration, Fe3+ concentration, Cu2+ concentration or liquid-gas ratio significantly promotes Hg-0 removal. Increasing solution pH, NO concentration or SO2 concentration significantly inhibits Hg-0 removal. Hg-0 inlet concentration and reaction temperature have a small impact on Hg-0 removal. Oxidation of Hg-0 by (OH)-O-center dot plays a leading role for Hg-0 removal. The simultaneous removal efficiencies of Hg-0, SO2 and NO are up to 100%, 100%, 85.3% and 100%, 100%, 75.3% using Fe3+ and Cu2+ as catalysts, respectively. (C) 2015 Elsevier Ltd. All rights reserved.
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