分子筛重芳烃加氢脱烷基催化剂研究进展

Research progress of zeolites in catalysts for hydrodealkylation of heavy aromatics

采用催化加氢脱烷基技术将重芳烃转化生成苯、甲苯、二甲苯(合称BTX)等基本石油化工产品,是提高重芳烃利用率的重要途径。综述了分子筛催化剂在重芳烃催化加氢脱烷基反应中的研究进展,详细分析了各种分子筛催化剂的优缺点,并对分子筛催化剂的发展趋势进行了探讨。提出目前的重点是开发和应用新型大孔结构纳米分子筛、多级孔结构复合分子筛以及新的催化剂改性方法,通过优化组合金属组分提高催化剂的活性、稳定性、选择性及抗积炭能力。尤其针对含有更多C_(10)以上组分重芳烃原料,开发反应性能好、抗积炭性能强的重芳烃轻质化催化剂是未来研究工作的重中之重。

The technology of catalytic hydrodealkylation is employed to produce the basic petrochemicals,such as benzene, toluene,and xylenes （called by ajoint name as BTX） from heavy aromatics,which is an important approach to take full advantage of heavy aromatics.The research progress of zeolites in the heavy aromatics catalytic hydrodealkylation was summarized.The advantages and disadvantages of these catalysts were analyzed,respectively,especially the development trend of molecular sieve catalysts for catalytic hydrodealkylation.It was pointed out that the nano-molecular sieve with large pore diameter and hierarchical-pore-structured composite sieves as well as the new modification methods for catalysts should be the emphases of development and application.The act ivity,stabil ity,selectivity,and anti-carbon deposition of catalysts wereimprovedbyopt imizingthemetalscomposit ion. Inal lusiontotheheavyaromaticscontainingmoreC 10＋ aromatics,the most important work in future is to research the heavy aromatics catalysts to light one with fine reaction performance and anti-carbon deposition.