制备条件对V-Fe-Al催化剂在丙烷氧化脱氢中的影响  

Effects of Preparation Conditions on V-Fe-Al Catalyst in Propane Oxidative Dehydrogenation

作　　者：纪新雨 张聚华[1] JI Xin-yu;ZHANG Ju-hua(School of Materials Design and Engineering,Beijing Institute of Fashion Technology,Beijing 100029,China)

机构地区：[1]北京服装学院材料设计与工程学院,北京100029

出　　处：《北京服装学院学报（自然科学版）》2022年第3期19-26,共8页Journal of Beijing Institute of Fashion Technology：Natural Science Edition

基　　金：北京服装学院高水平教师队伍建设专项(BIFTTD201903);北京服装学院重点教改项目(ZDJG-1803)。

摘　　要：探究了共沉淀法制备V-Fe-Al中p H值与煅烧温度对其性能的影响。采用拉曼光谱(Raman)、X射线衍射(XRD)、循环伏安(CV)、原位红外光谱(FT-IR)对催化剂进行表征,气相色谱仪对催化剂进行活性评价。结果表明:V_(2)O_(5)在催化剂表面分散度较高,钒与铁会发生化学反应,生成FeVO_(4)物种;p H=5.5和700℃的煅烧温度下制备的催化剂在450℃反应温度测试时,其丙烷转化率和丙烯选择性催化剂性能最佳,该促进作用可能与FeVO_(4)物种有关。This paper investigated the effects of pH value and calcination temperature in the preparation of copre-cipitation method on the performance of V-Fe-Al catalyst.The catalysts were characterized by Raman spectrosco-py(Raman),X-ray diffraction(XRD),cyclic voltammetry(CV)and in-situ infrared spectroscopy(FT-IR),and the catalytic activity was evaluated by gas chromatograph.The results show that V_(2)O_(5) has a high dispersion on the surface of the catalyst;vanadium and iron would interact chemically to form FeVO_(4)species.When the catalyst prepared at pH=5.5 and 700℃is calcined at 450℃,the propane conversion rate and the performance of propyl-ene selective catalyst are the best,which might be related to FeVO_(4).

关 键 词：共沉淀法 催化剂 丙烷氧化脱氢 循环伏安法 

分 类 号：O643.36[理学—物理化学] TQ221.212[理学—化学]