Synthesis of ZSM-23 zeolite with dual structure directing agents for hydroisomerization of n-hexadecane

被引：35

作者：

Chen, Yujing ^{[1
]}

Li, Chuang ^{[1
]}

Chen, Xiao ^{[1
]}

Liu, Yan ^{[1
]}

Liang, Changhai ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Chem Engn, Lab Adv Mat & Catalyt Engn, Dalian 116024, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2018年 / 268卷

关键词：

ZSM-23; Dual structure directing agents; Acidic site distribution; Hydroisomerization; INTERGROWTH ZEOLITE; CATALYTIC CRACKING; SMALL AMINES; MTT ZEOLITE; CRYSTALS; CRYSTALLIZATION; ISOMERIZATION; DECANE;

D O I：

10.1016/j.micromeso.2018.04.033

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Highly crystallized ZSM-23 zeolite samples were synthesized by employing the dual structure directing agents pyrrolidine (PY) and isopropylamine (IPA). The existence of two types of structure directing agents widened the synthesis composition ratio range and speeded up the crystallization. The samples obtained showed larger micropore surface areas and volumes compared with the products synthesized with single SDA. It was found that the use of the dual-structure directing agent had no effect on the total acidity but altered the acid site distribution where more weak and medium acidic sites were exposed and was found to be more suitable for n-hexadecane hydroisomerization. The bifunctional catalysts prepared from the supports using the dual-structure directing agent showed excellent catalytic performance under certain reaction conditions. It was noteworthy that Pt/PI-200 (Pt supported on the dual-structure directing agent with a SiO2 /Al2O3 ratio of 200) showed a constant selectivity to iso-hexadecane ca. 69% with contact time of 0.75 min and longer.

引用

页码：216 / 224

页数：9

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