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Cocrystalline Synthesis of ZSM‐5/ZSM‐11 and Catalytic Activity for Methanol to Propylene
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2020-06-03 , DOI: 10.1002/crat.202000027
Jiayi Tao 1 , Jianli Zhang 1 , Su-Bing Fan 1 , Xinhua Gao 1 , Qingxiang Ma 1 , Tian-Sheng Zhao 1
Affiliation  

Cocrystalline ZSM‐5/ZSM‐11 zeolite is hydrothermally synthesized at crystallization temperatures of 170 and 130 °C, respectively, in order to regulate the acidity as well as the framework Al distribution to enhance the propylene formation from methanol. ZSM‐5/11‐170 has analogous textural properties to ZSM‐5 but with increased strong Brønsted acid amount, raising the propylene selectivity by 49% in the methanol to propylene reaction at 480 °C, attributed to the increasing Al distribution in the straight channels by introduction of ZSM‐11 into ZSM‐5. With crystallization to 130 °C, the strong Brønsted acid amount of ZSM‐5/11‐130 is decreased by 82% compared with ZSM‐5/11‐170. The selectivity of propylene is increased to 38.25%, along with the decrease in the selectivity of ethylene and C5–C9.

中文翻译:

ZSM-5 / ZSM-11的共晶合成及其对甲醇制丙烯的催化活性

共结晶ZSM-5 / ZSM-11分子筛分别在170和130°C的结晶温度下水热合成,以调节酸度和骨架Al的分布,以增强甲醇中丙烯的形成。ZSM-5 / 11-170具有与ZSM-5相似的织构性质,但具有更高的布朗斯台德酸含量,在480°C的甲醇中,丙烯对丙烯的反应中丙烯选择性提高了49%,这归因于纯铝中Al分布的增加通过将ZSM-11引入ZSM-5来进行通道。结晶至130°C时,ZSM-5 / 11-130的强布朗斯台德酸含量与ZSM-5 / 11-170相比降低了82%。丙烯的选择性增加到38.25%,同时乙烯和C 5 –C 9的选择性降低
更新日期:2020-07-09
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