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Experimental Research of Chemically Modified Silicate for Mercury Removal from Flue Gas

Author: ChengWei
Tutor: XiangJun；SunLuShi
School: Huazhong University of Science and Technology
Course: Thermal Power Engineering
Keywords: Mercury Ore adsorbent Penetration Chemically modified Density Functional
CLC: X773
Type: Master's thesis
Year: 2011
Downloads: 45
Quote: 0
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Abstract


At present, China's energy consumption in the main is still coal resources, this situation is also maintained for a long period of time. With the large number of coal-fired power plants put into operation, which will lead to emissions of trace elements are also widely denounced by the people. Relevant laws of the countries are developing a series of arrangements of atmospheric mercury pollution control work on coal-fired power plants. This shows that in future coal-fired power plant mercury control will gradually into their planning. Firstly, research background on the subject as well as control power plant mercury emissions general introduction, followed by three kaolin, bentonite and zeolite ore adsorbent and its modified method using a salt solution modified method them modification, and a specific surface area, pore structure, composition analysis, elemental analysis, XRF and the thermal infrared analysis, and then modified ore adsorbent for adsorption system can be analyzed to reveal the adsorption characteristics of these ores adsorbent. Again, for the preparation of modified ore adsorbent simulated flue gas mercury removal experiment, as well as the use of microwave digestion recovery sample reliability analysis. Finally, the use of a means of quantum chemical adsorption of Hg ~ 0 performance of the the three ore adsorbent before and after modification, in order to verify the correctness of the experiment. The experimental results show that: the of three ore adsorbent ore on the adsorption properties of Hg ~ 0: bentonite gt; zeolite gt; the kaolin three adsorption saturation time is shorter, its physical adsorption; ore by KI, KBr change after sex on Hg to the adsorption performance is significantly enhanced adsorption into chemical adsorption by physical adsorption; adsorption temperature, amount of adsorbent, the amount of salt solution after modified adsorbent Hg ~ 0 has a certain influence, with the adsorption temperature increases, the increase of the amount of adsorbent, and the increase in the amount of modified salt solution, adsorbed by the adsorbent Hg ~ 0 performance also increases; initial concentration of mercury adsorbed on the adsorbent Hg ~ 0 performance was less affected; adsorption on the adsorbent after the recovery of samples by microwave digestion and contrast adsorption results showed that the adsorption experiment is to some extent true, reliable; the quantum chemistry verify the results of previous experiments, that before and after modification, the the three ore adsorbent on Hg CVAFS analysis ~~ 0 adsorption by simple physical adsorption into chemical adsorption, and the metal ions in the montmorillonite conducive Hg ~ 0 Adsorption.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > Power of industrial waste treatment and comprehensive utilization > Electric Power Industry
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