Excellent Methanol to Olefin Performance of SAPO-34 Crystal Deriving from the Mixed Micropore, Mesopore, and Macropore Architecture,Crystal Growth & Design

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Excellent Methanol to Olefin Performance of SAPO-34 Crystal Deriving from the Mixed Micropore, Mesopore, and Macropore Architecture
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2020-03-04 , DOI: 10.1021/acs.cgd.0c00002
Ying-Liang Zhu ₁ , Haowen Dai _{1,

2} , Ying Duan ₁ , Qiang Chen ₁ , Meng Zhang ₁

Affiliation

Hierarchical aluminosilicophosphate SAPO-34 crystals with designed micropore, mesopore, and macropore architecture are successfully prepared via a simple in situ base etching; the volume ratio of macropore, mesopore, and micropore could be appropriately regulated. With the incorporation of macropore structures into the SAPO-34 zeolites, some thin walls are formed simultaneously; these larger pores and thin walls could certainly shorten the diffusion path length and improve diffusion property, therefore increasing the lifetime as well as ethylene plus propylene selectivity of SAPO-34 catalysts in methanol to olefin reaction. The sample, with a volume ratio of micropore, mesopore, and macropore of about 18:1:87, presents a longer lifetime of 206 min, as well as higher ethylene plus propylene selectivity of 84.35%, in comparison to the conventional microporous sample of 106 min and 77.53%.

中文翻译：

来自混合微孔，中孔和大孔结构的SAPO-34晶体具有优异的甲醇制烯烃性能

通过简单的原位基底蚀刻成功地制备了具有设计的微孔，中孔和大孔结构的分层硅铝磷酸盐SAPO-34晶体；大孔，中孔和微孔的体积比可以适当调节。随着大孔结构结合到SAPO-34沸石中，一些薄壁同时形成。这些较大的孔和薄壁无疑可以缩短扩散路径的长度并改善扩散性能，因此可以延长甲醇中烯烃反应中SAPO-34催化剂的寿命以及乙烯加丙烯的选择性。样品的微孔，中孔和大孔的体积比约为18：1：87，使用寿命更长，为206分钟，乙烯和丙烯的选择性更高，为84.35％，

更新日期：2020-04-23

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