球磨改性高熵氧化物对烟气中邻二甲苯的催化研究  

Catalytic oxidation of o-xylene in flue gas by ball milling modified oxides with high entropy

作　　者：葛云逸 黄婷 张笑[1,2] GE Yun-yi;HUANG Ting;ZHANG Xiao(School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300130,China;Tianjin Key Laboratory of Clean Energy and Pollution Control,Tianjin 300130,China)

机构地区：[1]河北工业大学能源与环境工程学院,天津300130 [2]天津市清洁能源利用与污染物控制重点实验室,天津300130

出　　处：《现代化工》2024年第12期129-134,共6页Modern Chemical Industry

基　　金：国家自然科学基金(51808181);国家自然科学基金联合基金(U20A20302);河北省自然科学基金(E2020202097);河北省创新群体项目(E2021202006)。

摘　　要：为开发将可挥发性有机物(VOCs)与燃煤烟气中其余污染物协同脱除的新型催化剂,研究了具备处理燃煤烟气污染物能力的新型材料高熵氧化物(HEO)。受限于HEO制备过程的高温条件,催化剂样品存在表面积低、活性位点掩盖等不利现象;利用球磨法处理得到了可应用于复杂燃煤烟气中的催化剂。通过烟气模拟实验研究了球磨参数对催化剂的物理化学影响及其应用于烟气复杂组分(H_(2)O、SO_(2))时对邻二甲苯脱除过程的影响和规律。结果表明,HEO样品经过适宜的球磨改性后,对多污染物的催化效率、抗毒性明显增强,且不存在明显的竞争吸附,这是由于球磨后多样的活性位点暴露、氧空位增加、晶格氧活化导致的。In order to develop new catalysts for the synergistic removal of volatile organic compounds(VOCs)and the rest of the pollutants in coal-fired flue gas,high entropy oxides(HEOs)are considered.However,HEO catalyst samples suffer from unfavorable phenomena such as low surface area and active site masking due to the high temperature conditions.Therefore,the catalysts that can treat with complex coal-fired flue gas are prepared through a ball milling process.The flue gas treatment simulation experiments are utilized to study the physicochemical effects of ball milling parameters on the catalysts,and their influences on o-xylene removal process when the catalysts are applied to the flue gas with complex components such as H_(2)O and SO_(2)).Results show that HEO samples modified by suitable ball milling conditions show significantly enhanced catalytic efficiency and enhanced anti-toxicity against multiple pollutants,showing no significant competitive adsorption.This is due to the exposure of diverse active sites,the increase of oxygen vacancies and the activation of lattice oxygen after ball milling.

关 键 词：高熵氧化物 球磨 催化氧化 烟气组分 邻二甲苯 

分 类 号：X511[环境科学与工程—环境工程]