低碳化学与化工2025，Vol.50Issue(11)：86-96,11.DOI:10.12434/j.issn.2097-2547.20250063
铈铝复合催化剂协同介质阻挡放电对六氟化硫的降解性能研究
Study on degradation performance of sulfur hexafluoride by cerium-aluminum composite catalyst synergized with dielectric barrier discharge
摘要
Abstract
Sulfur hexafluoride(SF6)has become a key target of global emission reduction efforts due to its extremely strong greenhouse effect and high chemical inertness.However,existing technologies such as thermal catalysis and photocatalysis generally face problems such as low degradation efficiency and high energy consumption.A novel cerium-aluminum composite catalyst(i-AlCeO2)was prepared via the sol-gel method,and combined with dielectric barrier discharge(DBD)plasma technology to achieve efficient degradation of SF6.The physicochemical properties of the catalyst were characterized,and key parameters such as n(Al)/n(Ce)(i=7/1,5/3,3/5 and 1/7)in the catalyst and the DBD input power(40 W to 60 W)were optimized.Meanwhile,the transformation mechanism of Ce3+to Ce4+and the generation of oxygen vacancies on the catalyst surface under plasma excitation were analyzed based on XPS characterization.The results show that adjusting n(Al)/n(Ce)and input power could significantly enhance the degradation efficiency of SF6.Under the conditions of using Ar as the carrier gas,the SF6 volume fraction of 1.53%and the input power of 50 W,the 3/5-AlCeO2 catalyst exhibits excellent catalytic degradation performance,achieving a degradation efficiency of 99.8%and a energy yield of 28.99 g/(kW·h),and the degradation efficiency remains stable over 99%after continuous operation about 40 min.Analysis reveals that the 3/5-AlCeO2 possesses a large pore size of 13.08 nm and abundant surface oxygen,which in synergy with the pre-dissociation effect of high-energy electrons generated by DBD on SF6,promotes the Ce3+-mediated attack of oxygen radicals(·O)on S—F bonds,thereby achieving deep degradation of SF6.This study aims to overcome the technical bottleneck of efficient and low-energy SF6 degradation through multi-scale catalyst design and plasma synergistic excitation strategy,and to clarify the structure-activity relationship and reaction mechanism,providing a reference for related research.关键词
SF6/DBD/铈铝复合催化剂/降解效率Key words
SF6/DBD/cerium-aluminum composite catalyst/degradation efficiency分类
化学化工引用本文复制引用
杨扉妃,董润泽,杨阳,王乐萌,付东,张盼..铈铝复合催化剂协同介质阻挡放电对六氟化硫的降解性能研究[J].低碳化学与化工,2025,50(11):86-96,11.基金项目
国家自然科学基金青年科学基金(52106009) （52106009）
河北省自然科学基金面上项目(E2021502024) （E2021502024）
资源环境系统优化教育部重点实验室课题(KLRE-KF202309). （KLRE-KF202309）
