摘要
分别以钒渣(VS)和提钒尾渣(DVS)为原料,用硫酸浸出其中的金属元素作为催化剂的活性组分,与NaOH共沉淀,采用水热合成法制备得到两种钒渣型催化剂(CVS和CDVS),用于甲苯的催化燃烧。采用X射线荧光光谱(XRF)、BET比表面积分析、扫描电子显微镜(SEM)和X射线光电子能谱(XPS)等表征技术,分析钒渣型催化剂的元素组成、织构性能、表面形貌以及材料表层电子环境。结果表明,所制备的钒渣型催化剂均以含铁氧化物为主,具有良好的介孔结构。其中,采用钒渣制得的催化剂(CVS)的比表面积可达190m^(2)/g,孔径分布较窄,孔容为0.33cm^(3)/g。CVS表面具有更强的氧物种吸附能力,使得CVS对甲苯具有良好的催化活性,T50和T90分别为202℃和246℃。
Vanadium slag(VS)and vanadium tailing slag(DVS)were used as raw materials,respectively.Metal elements in them were leached out with sulfuric acid(as the active components of the catalysts),co-precipitated with NaOH,and then two types of vanadium slag-type catalysts(CVS and CDVS)were prepared via hydrothermal synthesis for the catalytic combustion of toluene.X-ray fluorescence(XRF),Brunauer-Emmett-Teller(BET),scanning electron microscopy(SEM),and X-ray photoelectron spectroscopy(XPS)were used to characterize and analyze the vanadium slag catalysts,including their elemental composition,textural property,surface morphology,and surface electronic environment.The results showed that the vanadium slag catalysts prepared by this method were mainly iron-containing oxides with a well-developed mesoporous structure.The specific surface area of CVS(derived from VS)was up to 190 m^(2)/g,with a narrow pore size distribution and a pore volume of 0.33 cm^(3)/g.CVS had a stronger adsorption capacity for oxygen species on its surface,which contributed to its good catalytic activity for toluene,with T50 and T90 of 202°C and 246°C,respectively.
作者
曾倩
吴艳华
严政
李传敏
曹年平
何俊良
刘建英
杨林
ZENG Qian;WU Yanhua;YAN Zheng;LI Chuanmin;CAO Nianping;HE Junliang;LIU Jianying;YANG Lin(College of Resources and Environment,Chengdu University of Information Engineering,Chengdu 610225;College of Carbon Neutrality Future Technology,Sichuan University,Chengdu 610065)
出处
《北京大学学报(自然科学版)》
北大核心
2025年第5期931-936,共6页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金(51608061)资助。
关键词
钒渣
酸浸
VOCS
甲苯
催化燃烧
vanadium slag
acid leaching
VOCs
toluene
catalytic combustion
