学术
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、13^C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。[著者文摘]
文章出处:
《含能材料》-2007年15卷4期 -305-309页
栏目信息:
文献标识码:
A
文章编号:
1006-9941（2007）04-0305-05
Effects of Temperature on the Coke and its Precursors Formation During Catalytic Cracking of Toluene over USY
CHEN Gui-mei, LI Zi-mu, ZHANG Xiang-wen, MI Zhen-tao （ Key Laboratory of Green Technology of Ministry of Education , School of Chemical Engineering, Tianjin University, Tianjin 300072, China）
Abstract:
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.[著者文摘]
Key words:
analysis chemistry; precursors of coke; catalytic cracking; toluene; USY catalyst
基金资助:
国家自然科学基金项目（20576098）
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