摘要
活性炭改性是对活性炭微观结构的修缮过程,常用改性方法中微波辐照法和金属负载法因其独特优势备受青睐。近年来,国内外研究者在微波负载金属氧化物活性炭处理污染方面取得一定成果。本文介绍了微波辐照下金属负载活性炭的制备,分析了负载金属种类及其在污染治理方面的效果。微波作为一种环保领域新型加热方式,在微波场中活性炭可以提高加热效率、改善其表征性能。活性炭负载金属可以增加活性炭表面官能团数量,提高活性炭对特定物质的催化脱附能力。其中贵金属单质负载活性炭吸附效果最好,但制备工艺复杂、稳定性差、价格昂贵;非贵金属单质虽然价格低廉,但稳定性不高;过渡金属氧化物负载活性炭不仅工艺简便、成本低廉,而且制得的催化剂具有较好的吸附催化能力,催化剂稳定性得到显著提升。同时,探究了微波辐照下金属负载活性炭脱硫脱硝机理,发现微波辐照金属氧化物活性炭脱硫脱硝更加节能、高效;金属氧化物在微波场中可以降低反应所需活化能,从而降低能耗。展望了微波负载非贵金属氧化物活性炭脱硫脱硝的发展前景,为制备高效脱硫脱硝催化剂提供理论基础。
Activated carbon modification is the repair process of the microstructure of activated carbon,and the microwave irradiation method and metal loading method are favored by researchers because of their unique advantages.In recent years,researchers at home and abroad have achieved certain results in the treatment of pollution by microwave-loaded metal oxide activated carbon.In this paper,the preparation of metal-supported activated carbon under microwave irradiation is introduced,and the types of supported metals and their effects on pollution control are analyzed.As a new heating method in the field of environmental protection,activated carbon in microwave field can improve heating efficiency and characterization performance.Activated carbon supported metal can increase the number of functional groups on the surface of activated carbon and improve the catalytic desorption ability of activated carbon to specific substances.Among them,the precious metal element-loaded activated carbon has the best adsorption effect,but the preparation process is complicated,the stability is poor,and the price is high.Although the price of non-precious metal elements is low,the stability is not high;The transition metal oxide-supported activated carbon not only has a simple process and low cost,but also the prepared catalyst has good adsorption catalytic capacity,and the stability of the catalyst is significantly improved.At the same time,the mechanism of desulfurization and denitrification of metal-supported activated carbon under microwave irradiation was explored,and it was found that the desulfurization and denitrification of microwave-irradiated metal oxide activated carbon was more energy-saving and efficient.Metal oxides in a microwave field can reduce the activation energy required for the reaction,thereby reducing energy consumption.The development prospect of microwave-supported non-noble metal oxide activated carbon desulfurization and denitrification is prospected,which provides a theoretical basis for the preparation of high-efficiency desulfurization and denitrification catalysts.
作者
郝克
石焱
孟令一
王健雄
王文军
Hao Ke;Shi Yan;Meng Lingyi;Wang Jianxiong;Wang Wenjun(Key Laboratory of Modern Metallurgical Technology of Hebei Province,School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei)
出处
《河北冶金》
2023年第10期8-14,共7页
Hebei Metallurgy
基金
国家自然科学基金项目(52174312)
河北省自然科学基金-高端钢铁冶金联合基金项目(E2021209151)。
关键词
活性炭
微波辐照
金属负载
催化剂
脱硫脱硝
activated carbon
microwave irradiation
metal load
catalyst
desulfurization and denitrification
作者简介
郝克(1996-),男,硕士,从事冶金环保与资源综合利用研究,E-mail:1738176644@qq.com;通讯作者:石焱(1980-),女,博士,教授,主要从事冶金环保、冶金节能、冶金资源综合利用等方面的研究,E-mail:yan.sky@126.com。
