低碳化学与化工2024，Vol.49Issue(6)：105-114,10.DOI:10.12434/j.issn.2097-2547.20230369
介孔氧化硅分子筛负载金属氧化物高温煤气脱硫剂结构调控与脱硫过程放硫的研究进展
Research progress on structure regulation of high-temperature coal gas desulfurizers loaded with metal oxides on mesoporous silica molecular sieves and sulfur release process during desulfurization
摘要
Abstract
Coal gasification is a core technology for the clean and efficient utilization of coal.However,the hydrogen sulfide(H2S)contained in the gasified crude gas will corrode the equipment and pollute the environment,so it is necessary to purify and desulfurize the gas.Mesoporous silica molecular sieves have the characteristics of large specific surface area,large pore volume,and ordered mesoporous structure.As the carrier of the metal oxide,it can promote the dispersion of the metal oxide,provide a large number of reaction active sites for the desulfurization reaction,and reduce mass transfer resistance.The structure-activity relationship of desulfurizer is one of the key scientific problems in gas desulfurization technology.However,for supported high-temperature coal gas desulfurizer,this relationship is superimposed and influenced by multiple factors such as mesoporous silica zeolite,types of desulfurization active components,modification methods of desulfurizers,and desulfurization conditions,so it is extremely challenging to clarify its essence.Firstly,the pore structure characteristics of different mesoporous silica molecular sieves were discussed,and the desulfurization behavior differences of mesoporous silica molecular sieves loaded with active components were analyzed.It is found that desulfurizers with a carrier possessing abundant pore structure and thicker pore walls exhibit better performance in high-temperature desulfurization processes.The structural control strategies of metal oxide supported desulfurizers based on zinc,manganese and iron in recent years and their effects on desulfurization performance were analyzed.It is evident that the desulfurization activity of the active components can be enhanced by metal doping.The sulfur release mechanism,sulfur release pattern and suppression means in the desulfurization process were discussed.The introduction of catalytic carbonyl sulfur(COS)hydrogenolysis agent in the desulfurizer can effectively inhibit the sulfur emission behavior.The review can provide a theoretical basis for the structural design and functional construction of high-performance and high-temperature desulfurizers.关键词
高温煤气/脱硫/介孔氧化硅分子筛/金属氧化物/放硫/羰基硫Key words
high-temperature coal gas/desulfurization/mesoporous silica molecular sieves/metal oxides/sulfur release/carbonyl sulfide分类
化学化工引用本文复制引用
刘佳雯,段新伟,武蒙蒙,米杰,王建成..介孔氧化硅分子筛负载金属氧化物高温煤气脱硫剂结构调控与脱硫过程放硫的研究进展[J].低碳化学与化工,2024,49(6):105-114,10.基金项目
国家自然科学基金(22278294,21978188) （22278294,21978188）
山西省自然科学基金(20210302123191) （20210302123191）
山西省科技创新人才团队项目(202204051002025) （202204051002025）
山西省环境催化材料技术创新中心项目(202104010911008). （202104010911008）
