摘要
吡啶合成中所用的催化剂为负载铅ZSM-5分子筛(Pb-ZSM-5),活性很好,但反应过程中催化剂很易发生积炭失活。通过对O2烧炭再生、水蒸汽再生和甲醇再生处理的催化剂进行评价以及进行BET、XRD和TPD表征,结果表明,甲醇再生方法效果明显,提高了催化剂的寿命。催化剂再生过程要抑制"飞温"现象发生。
Methods for regeneration of commercial supported ZSM-5 zeolite catalysts, including burning （controlled oxidation）, regeneration by steam and regeneration by methanol, were reviewed. regeneration behaviors of Pb-ZSM-5 zeolite catalyst for synthesis of pyridine bases were inves characterized by BET, XRD and TPD. The results indicated that regeneration by methanol prolonged life cycle of the catalyst. Measures should be taken to prevent temperature jump regeneration. tigated coke The and remarkably during the regeneration.
出处
《工业催化》
CAS
2008年第6期23-26,共4页
Industrial Catalysis
关键词
催化化学
分子筛催化剂
吡啶合成
结焦
再生
catalytic chemistry
zeolite catalyst
pyridine synthesis
coke formation
regeneration
