摘要
对以溴化钠为助剂的碱性分子筛ＫＹ催化剂上的甲苯与甲烷氧化甲基化合成苯乙烯和乙苯（Ｃ８）进行了研究。ＫＹ分子筛本身对甲苯的氧化甲基化的活性很低，但在添加ＮａＢｒ后其催化活性大大提高。对ＮａＢｒ负载量对催化剂活性的影响进行了考察，当负载量为８ｗ％时Ｃ８的选择性及收率均为最高，分别达到８１．７％和５３．１％。此外，以８ｗ％ＮａＢｒ／ＫＹ为催化剂，考察了甲烷分压、氧气分压、反应温度及空速对Ｃ８选择性及收率的影响。
The oxidative methylation of toluene with methane to ethylbenzene and styrene has been investigated over NaBr promoted KY zeolite catalyst.Only KY zeolite showed very low C 8 yield and selectivity.The catalytic activity has been greatly enhanced by incorporating NaBr into KY zeolites.The effect of loading NaBr on catalytic activity was studied.It was found that the C 8 yield and selectivity of NaBr/KY catalysts were increased with increasing NaBr loading.The 8w% NaBr/KY catalyst showed the maximum C 8 yield of 53 1% with the selectivity of 81 7%.The effects of space velocity,reaction temperature and reactant partial pressure in the feed gas have also been studied.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
1996年第3期30-34,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家自然科学基金
