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首页> 外文期刊>Catalysis science & technology >tert-Butylation of naphthalene by tertiary butanol over HY zeolite and cerium-modified HY catalysts
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tert-Butylation of naphthalene by tertiary butanol over HY zeolite and cerium-modified HY catalysts

机译：tert-Butylation萘的叔丁醇在HY沸石和cerium-modified HY催化剂

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摘要

tert-Butylation of naphthalene is a promising process for the production of 2,6-DANs, which are fundamental starting materials for PEN. Herein, the tert-butylation of naphthalene with tertiary butanol was carried out in the liquid phase over a series of Ce-modified HY zeolites. XRD, SEM, TEM, XPS, NH3-TPD and FT-IR characterization studies proved that the Ce species dispersed uniformly on the HY zeolite in the form of small cerium oxide clusters/ nanoparticles. The formed Ce2O3 and CeO2 interacted with the hydroxyl groups in the zeolite, which caused the passivation of silicon-aluminium bridge hydroxyl groups in supercages and sodalite cages, resulting in the decrease of acid concentration and acid strength. Due to the weakened acid strength, the selectivity for 2,6-DTBN in the pores was greatly enhanced. Moreover, the non-selective acid sites on the external surface were reduced by Ce modification, which effectively inhibited dealkylation and isomerization reactions and thus helped to maintain the high selectivity for 2,6-DTBN.
机译：tert-Butylation萘是一种很有前途的生产过程2,6-DANs,笔的基本原料。萘的tert-butylation三级丁醇进行了液相的结束一系列Ce-modified HY沸石。TEM、XPS、NH3-TPD和红外光谱表征研究证明,Ce物种分散在HY沸石的形式均匀小氧化铈集群/纳米粒子。Ce2O3和CeO2与羟基相互作用组的沸石,导致钝化silicon-aluminium桥羟基组在supercages和方钠石笼,导致酸浓度的减少和酸强度。力量、选择性2 6-DTBN毛孔是极大地增强了。非选择性酸网站外部表面减少了Ce修改,有效地抑制脱烷基化作用和异构化反应,从而帮助保持2的高选择性,6-DTBN。

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