Experimental study of enhancement of demercuration from flue gas by calcium-based composite sorbent with non-thermal plasma treated
BAI Li-yi1, DUAN Yu-feng1, DING Wei-ke1, HU Peng1, WEI Hong-qi1, ZHANG Jun2
1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China;
2. School of Chemistry and Material Science, Huaibei Normal University, Huaibei 235000, China
The influence of SO2, O2 and non-thermal plasma treatedon mercury removal by sorbent of high porosity and high specific surface area was investigated in a fixed bed bench. The mechanism of demercuration was analyzed by different characterization methods. As non-thermal plasma treatment increases relative content of oxygen-containing functional groups on the surface of sorbent, the study showed that the adsorption of mercury removal significant increases. In 0.07% SO2+6% O2atmosphere, the efficiency of mercury removal rose from 23.7% to 91.2% compared with which in the non-oxygen atmosphere. As active sites of the adsorption of Hg0, hydroxyl group and ester group improved the efficiency of demercuration. But the effect of carbonyl group was not obvious. It was due to the presence of O2 that the unsaturated bonds of carbon atoms was increased. With the increase of SO2 concentration to 0.15%, the competitive mechanism was the main effect. The efficiency of mercury removal dropped to 23.3%.
白李一, 段钰锋, 丁卫科, 胡鹏, 韦红旗, 张君. 低温等离子强化复合钙基吸附剂脱汞实验研究[J]. 中国环境科学, 2018, 38(4): 1280-1286.
BAI Li-yi, DUAN Yu-feng, DING Wei-ke, HU Peng, WEI Hong-qi, ZHANG Jun. Experimental study of enhancement of demercuration from flue gas by calcium-based composite sorbent with non-thermal plasma treated. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(4): 1280-1286.
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