摘要
基于响应面法设计制备了负载型铜基催化剂,并开展了低温下的苯催化氧化实验.研究了催化剂的煅烧温度、煅烧时间及活性组分浓度对其催化性能的影响.结果表明,在350℃条件下,Y1、Y2催化苯氧化的转化率Xc分别达到了90.3%及92%,与预测值吻合.反应温度从250℃到450℃的温度影响实验结果表明,随着反应温度增加,苯转化率提高,且Y2催化下的增幅大于Y1,450℃时最大转化率为95.7%.催化剂表征分析表明600℃煅烧6 h时形成Cu O晶体,可维持较高的比表面积;800℃煅烧时形成催化活性更强的铜铝尖晶石,但比表面积降低.
Cu-based catalysts were prepared to carry out the catalytic oxidation of benzene at low temperatures based on the response surface method.The influences of calcination temperature(T),calcination time(t),and active constituent concentration(c)of the catalysts were investigated.The results indicate that Cu-based catalysts exhibited good performance in benzene catalytic oxidation when T-t-c was 600℃-4 h-30%(Y1)or 800℃-8 h-10%(Y2).At a reaction temperature of 350℃,the carbon conversions of Y1 and Y2 reached 90.3%and 92%,respectively;these results agree well with the predicted values.Successive experiments from 250℃to 450℃indicate that the conversion of benzene increased with temperature,and Y2 showed better performance than Y1 with a maximum conversion of 95.7%at 450℃.Characterization analysis of the catalysts indicates that formation of CuO crystals occured when T=600℃and t=6 h,and a high specific surface area was maintained.Calcination at 800℃produced Cu-Al spinel with high catalytic activity but decreased specific surface area.
作者
马越
霍晓东
陶炜
李巧
肖军
Ma Yue;Huo Xiaodong;Tao Wei;Li Qiao;Xiao Jun(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Thermal Engineering Research Institute,Southeast University,Nanjing 210096,China)
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2019年第2期154-160,共7页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目(51576047)
关键词
生物质焦油模化物
苯
催化氧化
响应面法
biomass tar model compound
benzene
catalytic oxidation
response surface method
