燃料化学学报（中英文）2025，Vol.53Issue(1)：53-69,17.DOI:10.1016/S1872-5813(24)60501-3
卤化钠浸渍赤泥脱除燃煤烟气中单质汞的研究
Removal of elemental mercury from coal combustion flue gas by sodium halides impregnated red mud
摘要
Abstract
Mercury removal from coal combustion flue gas remains a significant challenge for environmental protection due to the lack of cost-effective sorbents.In this study,a series of red mud(RM)-based sorbents impregnated with sodium halides(NaBr and NaI)are presented to capture elemental mercury(Hg0)from flue gas.The modified RM underwent comprehensive characterization,including analysis of its textural qualities,crystal structure,chemical composition,and thermal properties.The results indicate that the halide impregnation substantially impacts the surface area and pore size of the RM.Hg0 removal performance was evaluated on a fixed-bed reactor in simulated flue gas(consisting of N2,O2,CO2,NO and SO2,etc.)on a modified RM.At an optimal adsorption temperature of 160 ℃,NaI-modified sorbent(RMI5)offers a removal efficiency of 98%in a mixture of gas,including O2,NO and HCl.Furthermore,pseudo-second-order model fitting results demonstrate the chemisorption mechanism for the adsorption of Hg0 in kinetic investigations.关键词
脱汞/赤泥/卤化钠/浸渍/烟气Key words
mercury removal/red mud/sodium halides/impregnation/flue gas分类
化学化工引用本文复制引用
穆罕默德-萨尔弗拉兹,李扬,杨赫,靳立军,李德康,胡浩权..卤化钠浸渍赤泥脱除燃煤烟气中单质汞的研究[J].燃料化学学报（中英文）,2025,53(1):53-69,17.基金项目
The project was supported by the National Natural Science Foundation of China(22278066,21776039),the National Key R&D Program of China(2023YFB4103001)and The Fundamental Research Funds for the Central Universities(DUT2021TB03). （22278066,21776039）
