裂解C_9常压芳构化的研究

以裂解C_9为原料、改性ZSM-5分子筛为催化剂,在40mL固定床催化反应装置上进行了裂解C_9芳构化的探索实验,实验结果表明,反应温度在450～500℃内,苯、甲苯、二甲苯(三者简称为BTX)的含量迅速增加、茚和茚满的总含量快速下降。在200mL固定床催化反应装置上进行了芳构化放大实验,实验结果发现,在改性的ZSM-5分子筛用量115.3g、常压、反应温度500℃、WHSV=0.30h~(-1)的条件下,得到了无色透明的可作芳烃原料的液相产物,液相产物中BTX的质量分数大于71%、茚和茚满的总质量分数小于2%,液体收率的平均值为75%。改性ZSM-5分子筛催化剂可重复使用。

Study of Cracking C9 Aromatization Under Normal Pressure

Aromatization of cracking C_9 on a modified ZSM-5 molecular sieve catalyst was carded out in a 40 mL fixed-bed reactor.The experimental result indicated that in the reaction temperature range of 450℃ to 500℃,the contents of benzene,toluene and xylene(BTX)increased quickly and the total content of both indene and indane decreased rapidly.The scale-up aromatization test was conducted in a 200 mL fixed-bed reactor.The colorless and transparent liquid products could be obtained,which could be used as aromatic raw materials.Under the optimal reaction conditions of modified ZSM-5 molecular sieve catalyst 115.3 g,atmospheric pressure,reaction temperature 500℃ and mass space velocity 0.30 h~(-1),BTX mass fraction and total mass fraction of both indene and indane in the liquid products were more than 71% and less than 2%,respectively,and yield of the liquid products was 75%.The modified ZSM-5 molecular sieve catalyst could be reused.