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| HZSM-5催化剂在MTG反应中的积炭失活 | |
| 引用本文： | 张向京,马仁娟,孙瑞钰,刘玉敏. HZSM-5催化剂在MTG反应中的积炭失活[J]. 化工学报, 2015, 66(9): 3483-3489. DOI: 10.11949/j.issn.0438-1157.20150891 |
| 作者姓名： | 张向京 马仁娟 孙瑞钰 刘玉敏 |
| 作者单位： | 河北科技大学化学与制药工程学院, 河北 石家庄 050018 |
| 摘 要： | 在固定床不锈钢反应器中进行了HZSM-5分子筛催化甲醇制汽油(MTG)反应的催化性能和失活实验。采用热重、X射线衍射、FT-IR、低温氮吸附-脱附、色谱-质谱联用仪等方法对催化剂进行了表征。结果表明,在反应进行到336 h时,甲醇转化率为40%,汽油收率低至12.6%,催化剂严重失活,但在700℃有氧再生后活性恢复,且保持了完整的MFI结构。积炭是催化剂失活的主要原因,大部分积炭沉积在分子筛微孔中,积炭物种主要是带有双键的聚合态化合物和稠环芳烃。 |
| 关 键 词： | HZSM-5沸石 MTG反应 催化 失活 焦化 |
| 收稿时间： | 2015-06-10 |
| 修稿时间： | 2015-06-18 |
Deactivation of HZSM-5 catalyst in methanol to gasoline |
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| ZHANG Xiangjing,MA Renjuan,SUN Ruiyu,LIU Yumin. Deactivation of HZSM-5 catalyst in methanol to gasoline[J]. Journal of Chemical Industry and Engineering(China), 2015, 66(9): 3483-3489. DOI: 10.11949/j.issn.0438-1157.20150891 | |
| Authors: | ZHANG Xiangjing MA Renjuan SUN Ruiyu LIU Yumin |
| Affiliation: | School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China |
| Abstract: | The catalytic performances and the main deactivation mode of HZSM-5 zeolite were investigated by methanol to gasoline (MTG) reaction in a stainless-steel fixed bed reactor. The catalyst was characterized by means of techniques such as TGA-DTA, XRD, FT-IR, N2 adsorption-desorption and GC-MS. The results showed that the methanol conversion was 40% and the gasoline yield could drop to 12.6% after 336 h for the reaction, resulting in the serious deactivation of HZSM-5 catalyst. However, the regenerated catalyst at 700℃ in the air had high activity and the MFI framework structure. It was found that the coke, which deposited mainly on micropores of HZSM-5, was the main reason for catalyst deactivation. The main components of coke deposits were polymer with double bond or/and polycyclic aromatic hydrocarbon. |
| Keywords: | HZSM-5 zeolite methanol to gasoline(MTG) catalysis deactivation coking |
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