陶瓷学报2025，Vol.46Issue(3)：499-505,7.DOI:10.13957/j.cnki.tcxb.2025.03.006
CeO2-CuO/TiO2催化剂的制备及其在微波下降解苯乙烯的性能研究
Preparation and Performance of CeO2-CuO/TiO2 Catalyst for Microwave Degradation of Styrene
摘要
Abstract
[Background and purpose]How to deal with the styrene waste gas produced in industrial production is a challenge,in terms of environmental protection.At present,the currently available styrene treatment methods include photocatalytic oxidation,activated carbon adsorption,traditional RTO technology,condensation recovery and biological drip filtration,among which the commonly used and efficient method is to use activated carbon or molecular sieve adsorption of styrene,while the adsorption material as solid waste incineration treatment or RTO combustion furnace treatment of styrene.These processes have various problems,such as large heat accumulation and requirement of insulation materials,easy blockage after styrene crosslinking during combustion,resulting in high fuel consumption and reduced production safety. [Methods]The combination of adsorption and catalytic combustion was adopted.Microwave absorbing heating honeycomb ceramics were made from wave-absorbing heating materials as the carrier.Sol-gel method was used to prepare(CeO2-CuO)/TiO2 on the surface of wave-absorbing heating honeycomb ceramics for low-temperature adsorption of catalytic combustion catalysts.The styrene is adsorbed and cross-linked on surface of the honeycomb ceramics,while the honeycomb ceramics can be heated rapidly through the microwave heating.The styrene can be burned and decomposed in situ at a lower temperature through microwave heating,with the generation of harmless CO2 and H2O. [Results]Complexing agents,C6H8O7,C10H14N2Na2O8,C6H15NO3,were used to complex Ce3+and Cu2+.The effects of complexing agents on micromorphology of the coatings were studied.The adsorption and thermal decomposition of the catalysts for styrene treatment were also evaluated.Phase composition,microstructure and specific surface area of the three low temperature adsorption catalytic combustion catalysts were characterized by using X-ray diffractometer(XRD),scanning electron microscope(SEM),automatic specific surface area and porosity analyzer.CeO2 and CuO diffraction peaks have the highest intensity at 600℃,without secondary phase.The catalyst coated with C10H14N2Na2O8 as the complexing agent has uniform grain distribution,small particle size and homogeneous dispersion.These nanoparticles are stacked closely and randomly,which enriches the pore structure of the catalyst,increases the pore area of the catalyst and enables the catalyst to have more catalytic active sites.These will help to improve the adsorption capacity and microwave catalytic decomposition capacity of styrene.In the temperature range of 100-200℃,the catalytic conversion rate of the catalyst is better than other catalysts. [Conclusions]C10H14N2Na2O8 has the highest adsorption efficiency for styrene and the highest catalytic conversion efficiency under microwave conditions.The catalyst particle sizes are in the range of 20-30 nm,the catalyst coating is of network structure,with large specific surface area,uniform pore size distribution and styrene adsorption efficiency of 95%.Under microwave conditions,the ignition temperature of styrene is only 90℃,the catalytic activity is the highest at 200℃,and the catalytic conversion rate reaches 90%.关键词
微波/苯乙烯处理/吸附/催化燃烧/溶胶—凝胶法Key words
microwave/styrene treatment/adsorption/catalytic combustion/sol-gel method分类
化学化工引用本文复制引用
王浩,赵硕涵,王秋龙,杜敬鑫..CeO2-CuO/TiO2催化剂的制备及其在微波下降解苯乙烯的性能研究[J].陶瓷学报,2025,46(3):499-505,7.基金项目
国家自然科学基金(50372033). （50372033）
