节能型乙苯脱氢催化剂的开发及其性能评价

Development and its performance evaluation of energy saving catalyst for ethylbenzene dehydrogenation

摘要:

在GS-11催化剂基础上通过增加铈含量、引入选择性调变剂和优化孔结构，开发了节能型催化剂。在负压绝热评价装置上，乙苯空速0.5h-1、一反/二反入口温度615℃/620℃、水比1.15（wt）,二反出口压力-55KPa条件下，乙苯转化率67.3％，苯乙烯选择性大于97.0％。催速老化试验结果表明，该催化剂的失活速率为-0.00404％/h，优于最新引进催化剂和GS-11催化剂。

Abstract:

The energy saving catalyst for ethylbenzene dehydrogenation to styrene which was based on GS-11 catalyst was developed by increasing the content of CeO2, introducing selective assistant and optimizing pore structure. The evaluation results on a negative pressure adiabatic reactor showed that ethylbenzene conversion was 67.3% and styrene selectivity was more than 97.0%, which were obtained under the operation condition of Inlet temperatures for the 1st and 2nd reactors: 615℃and 620℃, LHSV: 0.5h-1, outlet pressure for the 2nd reactor: -50KPa, mass ratio of steam to ethylbenzene: 1.15. Results of accelerated aging test indicated that deactivation rate of the catalyst was -0.00404％/h and better than the newest imported catalyst and GS-11 catalyst.