CAJ | 학술논문

在不同的焙烧温度下制备了Pt-Sn/SAPO-34催化剂,并使用X射线衍射、N2吸附、X射线荧光光谱、O2脉冲烧炭、H2程序升温还原和透射电镜等手段对催化剂进行了表征.在微型反应器中评价了Pt-Sn/SAPO-34催化剂对丙烷脱氧制丙烯反应的催化性能,考察了焙烧温度和反应气氛对催化剂性能的影响.结果表明,焙烧温度为500℃时,催化剂具有最佳的反应活性.当焙烧温度高于500℃时,催化剂出现不希望的表面变化,例如活性Pt位点的聚集、Pt的团聚、Sn的流失等.当反应温度为595℃时,Pt-Sn/SAPO-34催化性能稳定,且能够保持表面金属状态.
재불동적배소온도하제비료Pt-Sn/SAPO-34최화제,병사용X사선연사、N2흡부、X사선형광광보、O2맥충소탄、H2정서승온환원화투사전경등수단대최화제진행료표정.재미형반응기중평개료Pt-Sn/SAPO-34최화제대병완탈양제병희반응적최화성능,고찰료배소온도화반응기분대최화제성능적영향.결과표명,배소온도위500℃시,최화제구유최가적반응활성.당배소온도고우500℃시,최화제출현불희망적표면변화,례여활성Pt위점적취집、Pt적단취、Sn적류실등.당반응온도위595℃시,Pt-Sn/SAPO-34최화성능은정,차능구보지표면금속상태.
Pt-Sn/SAPO-34 catalyst samples were prepared at different calcination temperatures.The catalysts were characterized by X-ray diffraction,N2 adsorption,X-ray fluorescence spectroscopy,O2-pulse coke content measurement,temperature.programmed reduction with hydrogen,and transmission electron microscopy.The activity was measured in a microreactor.The effect of calcination temperature and reaction atmosphere on the catalytic properties of Pt.Sn/SAPO-34 for propane dehydrogenation to propylene was investigated.The catalyst prepared at the calcination temperature of 500℃ showed the best performance.while the catalysts prepared above and below the 500 ℃ calcination temperature showed undesirable surface changes such as Pt active site degradation,Pt sintering,loss of Sn,etc.At the reaction temperature of 595℃,Pt-SWSAPO-34 was stable and maintained surface metallic properties.