温度对USY催化模型吸热燃料甲苯超临界裂解结焦及前驱体的影响  

Effects of Temperature on the Coke and its Precursors Formation During Catalytic Cracking of Toluene over USY

作　　者：陈桂梅[1] 李子木[1] 张香文[1] 米镇涛[1] 

机构地区：[1]天津大学化工学院绿色合成与转化教育部国家重点实验室,天津300072

出　　处：《含能材料》2007年第4期305-309,共5页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金项目(20576098)

摘　　要：以甲苯为模型燃料,研究了温度对USY催化燃料裂解结焦及其前驱体的影响。采用热重、13C固体核磁、元素分析、色质联用、程序升温氧化法等手段对催化剂上的焦炭和液相产物中的焦炭前驱体进行了考察。结果表明,沉积在催化剂上的焦炭主要为缩合度较高的多环芳烃,随着温度的升高,结焦量增加,液相产物中多环芳烃的环数和含量均呈增加趋势。因此得出高温对抑制焦炭的产生不利。Effects of temperature on coke and its precursors formation were studied during catalytic cracking of toluene over USY catalyst. The coke and its precursors were analyzed by TGA, solid-state 13^C NMR,elemental analysis, GC-MS and temperature-programmed oxidation（TPO）. The coke deposited on the catalyst is mainly composed of polyaromatie hydrocarbons （PAH）. It reveales that the total amount of coke and the yield of PAH and its ring numbers in liquid phase increase with the increase of cracking temperature. It concludes that high temperature is bad for coke inhibition.

关 键 词：分析化学 焦炭前驱体 催化裂解 甲苯 USY催化剂 

分 类 号：O643.3[理学—物理化学]