• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Deactivation kinetics of individual C6–C9 aromatics' generation from methanol over Zn and P co-modified HZSM-5
【24h】

Deactivation kinetics of individual C6–C9 aromatics' generation from methanol over Zn and P co-modified HZSM-5

机译：Zn和P共修饰的HZSM-5上甲醇产生的单个C6-C9芳烃的失活动力学

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A deactivation kinetic model has been determined for the methanol to aromatic process over a HZSM-5 zeolite catalyst (SiO _(2) /Al _(2) O _(3) = 30) modified by 1.0 wt% ZnO and 2.0 wt% P, in which the generation rates of C _(6) –C _(9) aromatics are treated individually while olefins and paraffins are lumped as intermediate and byproduct, respectively. The time-dependent catalytic activity is described by a deactivation coefficient related to the concentration of both methanol and products. The established kinetic model is able to predict the product distribution along with on-stream time under various conditions and is identified to be valid by a model significance test. The effect of operating conditions on catalyst behavior was also investigated: deactivation rate increases dramatically with methanol partial pressure and temperature; higher feed methanol content leads to less aromatics and more paraffin; increasing temperature reduces paraffin generation and results in higher aromatic yield, especially benzene and toluene.
机译：已经确定了用1.0 wt％ZnO和2.0 wt％改性的HZSM-5沸石催化剂（SiO _（2）/ Al _（2）O _（3）= 30）对甲醇进行芳烃反应的失活动力学模型P，其中分别处理C _（6）-C _（9）芳烃的生成速率，而将烯烃和链烷烃分别作为中间产物和副产物。随时间变化的催化活性用与甲醇和产物的浓度有关的失活系数来描述。建立的动力学模型能够预测产品在各种条件下的分布以及运行时间，并通过模型显着性检验确定其有效。还研究了操作条件对催化剂行为的影响：失活速率随着甲醇分压和温度的增加而急剧增加;较高的进料甲醇含量导致更少的芳烃和更多的石蜡;升高温度会减少石蜡的产生，并导致更高的芳烃收率，尤其是苯和甲苯。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号