Preparation of Hierarchical ZSM‐5 Zeolites by in‐situ Crystallization of Mesoporous Carbon‐Silica Composite,ChemistrySelect

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Preparation of Hierarchical ZSM‐5 Zeolites by in‐situ Crystallization of Mesoporous Carbon‐Silica Composite
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-11-27 , DOI: 10.1002/slct.202003631
Jun Du _{1,

2} , Yan Wang ₂ , Yan Wang ₁ , Jinghong Ma ₁ , Ruifeng Li ₁

Affiliation

Hierarchical ZSM‐5 zeolites were synthesized by in‐situ crystallization of mesoporous carbon‐silica composites with a well‐ordered SBA‐15 structure. The hierarchical ZSM‐5 zeolite possessed a rather high external surface area (205 m²/g) and pore volume (0.35 cm³/g) compared with the reference ZSM‐5 zeolite, as well as higher acid‐site accessibility to large molecules. In the naphthalene benzylation reaction, the hierarchical HZSM‐5 zeolite converted approximate 50 % of benzyl chloride in 100 minutes under mild conditions and showed a high stability, which could be ascribed to the improved diffusion ability and acid‐site accessibility.

中文翻译：

中孔碳硅复合材料原位结晶制备ZSM-5分子筛

分级ZSM-5沸石是通过原位结晶具有良好SBA-15结构的介孔碳-二氧化硅复合材料合成的。与参考ZSM-5沸石相比，分层ZSM-5沸石具有相当高的外表面积（205 m ² / g）和孔体积（0.35 cm ³ / g），并且对大分子的酸中心可及性更高。在萘苄基化反应中，分层的HZSM-5沸石在温和的条件下在100分钟内转化了约50％的苄基氯，并显示出高的稳定性，这归因于扩散能力和酸位可达性的提高。

更新日期：2020-11-27

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