| 范宗良,边杰,季东,董鹏,杜知松,郭泳圻,李贵贤.改性纳米ZSM-11分子筛及其催化苯与甲醇烷基化反应的性能[J].分子催化,2018,32(2):180-186 |
| 改性纳米ZSM-11分子筛及其催化苯与甲醇烷基化反应的性能 |
| The Catalytic Performance Evaluation of Acid-Base Modified Nano-ZSM-11 Zeolite on Alkylation of Benzene with Methanol to Prepare Toluene |
| 投稿时间：2018-01-02 修订日期：2018-02-07 |
| DOI： |
| 中文关键词: ZSM-11分子筛 苯 甲醇 烷基化 甲苯选择性 |
| 英文关键词:ZSM-11zeolite benzene methanol alkylation the selectivity of toluene |
| 基金项目:甘肃省科技支撑项目（1604GKCD026）. |
|
| 摘要点击次数: 1393 |
| 全文下载次数: 1919 |
| 中文摘要: |
| 采用先NaOH溶液碱处理后用柠檬酸溶液酸处理的方法对纳米ZSM-11分子筛进行改性.采用X射线衍射（XRD）、N2吸附-脱附、扫描电镜（FE-SEM）、NH3-TPD和热重（TG）等技术对改性前后的样品进行表征，将得到的催化剂应用于苯与甲醇烷基化制甲苯反应，结果表明：采用经改性处理的纳米ZSM-11分子筛催化剂，在反应温度为350℃，压力为0.2 MPa，质量空速（WHSV）为6 h-1，苯与甲醇进料摩尔比为1∶1的条件下，苯与甲醇烷基化反应产物中甲苯选择性明显提高，苯转化率达到44.7%，甲苯和二甲苯总选择性达到97.4%，其中甲苯选择性为86.5%，甲苯收率为37.8%. |
| 英文摘要: |
| ZSM-11 were modified by citric acid solution acid after NaOH solution alkali treatment. The catalyst were Characterized by X-ray diffraction(XRD), N2 adsorption-desorption, scanning electron microscopy(FE-SEM), NH3-TPD, thermogravimetry and other methods, using the modified catalyst on alkylation of benzene with methanol to prepare toluene. The result showed that the selectivity of toluene increased obviously over the nano-ZSM-11 zeolite treated by acid-base on alkylation of benzene with methanol, under the conditions of the reaction temperature 350℃, the pressure 0.2 MPa, WHSV=6 h-1, n(C6H6):n(CH3OH)=1:1. The conversion of benzene reached 44.7%, the selectivity of toluene reached 86.5%, the selectivity of toluene and xylene was 97.4%, the yield of toluene was 37.8%. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
