SDA-Free Hydrothermal Synthesis of High-Silica Ultra-nanosized Zeolite Y,Crystal Growth & Design

当前位置： X-MOL 学术 › Cryst. Growth Des. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

SDA-Free Hydrothermal Synthesis of High-Silica Ultra-nanosized Zeolite Y
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2017-02-16 00:00:00 , DOI: 10.1021/acs.cgd.6b01564
Maeva Borel _{1,

2} , Mathias Dodin ₁ , T. Jean Daou ₂ , Nicolas Bats ₁ , Bogdan Harbuzaru ₁ , Joël Patarin ₂

Affiliation

Despite having been used in hydrocracking processes for decades, zeolite Y is still nowadays the subject of intense research aiming at improving its physicochemical properties. Here, and for the first time, the synthesis of zeolite Y nanocrystals prepared in organic template-free medium, featuring both extremely reduced dimensions (mean diameter below 30 nm) and a high silicon to aluminum ratio (Si/Al ≈ 2.2), is reported. The singularity of the protocol lies in the progressive adding of a silica source during synthesis combined with the use of prolonged aging times. These high-silica ultra-nanosized zeolite Y crystals display excellent textural properties (V_micropore = 0.33 cm³/g and S_BET = 830 m²/g), comparable to their microsized counterparts. In this work, the extensive study of the influence of various parameters (i.e., gel composition, aging time, and crystallization conditions) intended for the optimization of the synthesis protocol is also presented.

中文翻译：

无SDA的水热合成高二氧化硅超纳米沸石Y

尽管已经在加氢裂化过程中使用了数十年，但如今，Y沸石仍然是旨在改善其理化性质的大量研究的主题。在这里，这是第一次，在无模板有机介质中合成的沸石Y纳米晶体具有极小的尺寸减小（平均直径低于30 nm）和高的硅铝比（Si / Al≈2.2）的特点。报告。该协议的奇异之处在于在合成过程中逐步添加二氧化硅源，并使用了延长的老化时间。这些高二氧化硅超纳米沸石Y晶体显示出出色的组织特性（V_微孔= 0.33 cm ³ / g，S _BET = 830 m ²/ g），与它们的微型尺寸相当。在这项工作中，还提出了旨在优化合成方案的各种参数（即凝胶组成，老化时间和结晶条件）的影响的广泛研究。

更新日期：2017-02-16

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南