耐水固体酸的设计:疏水性和酸强度及其催化酯化性能之间的权衡

IF 2.1 4区 化学 Q3 CHEMISTRY, PHYSICAL
Juanli Shi, Lina Zhang, Zhenmin Cheng
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引用次数: 6

摘要

水作为酯化反应的副产物,容易吸附在固体酸催化剂上,造成活性组分的损失或骨架的分解,从而降低催化剂的反应活性和耐久性,而耐水固体酸的开发有望解决这些问题。本文对沸石、介孔二氧化硅、金属有机骨架催化剂、磁性纳米颗粒和聚合物催化剂等耐水固体酸的研究进展进行了综述。研究了耐水固体酸的疏水性、酸强度和结构对催化性能和稳定性的影响。从文献综述中发现,尽管改性沸石的水接触角高达160°,但其酸强度有待提高,微孔尺寸较小,限制了其在催化大分子酯化反应中的应用。相反,具有丰富的酸位、适宜的疏水性和丰富的中孔或大孔的固体酸通常具有较高的活性和可重复利用性。在已知的固体酸中,聚苯乙烯负载型酸性离子液体催化剂PS-CH2-[SO3H-pIM] [HSO4]的乙酸正丁酯收率高达99.1%,可重复使用13次,是对传统催化剂的突破。本文综述了耐水固体酸催化剂在酯化反应中的应用。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Design of Water-Tolerant Solid Acids: A Trade-Off Between Hydrophobicity and Acid Strength and their Catalytic Performance in Esterification

Water, as a byproduct in esterification, tends to adsorb on solid acid catalysts, causing loss of active components or decomposition of framework and thereby decreasing their reactivity and durability, while the development of water-tolerant solid acids is expected to solve these problems. In this review, the recent developments of major kinds of water-tolerant solid acids including zeolite, mesoporous silica, metal organic framework-based catalyst, magnetic nanoparticles, and polymeric catalyst are discussed in detail. Special attention has been paid to understand the role of hydrophobicity, acid strength, and structure of water-tolerant solid acids in catalytic performance and their stability. From the literature survey, it is found that despite the modified zeolites have a water contact angle as large as 160°, but their acid strength need to be improved and their small micropore sizes restrict their use in catalyzing the esterification of bulky molecules. In contrast, solid acids with abundant acid sites, suitable hydrophobicity, and abundant mesopores or macropores usually exhibit high activity and reusability. Among all the known solid acids, polystyrene-supported acidic ionic liquid catalysts (PS-CH2-[SO3H-pIM] [HSO4]) show a high yield of n-butyl acetate with 99.1% and high reusability of 13 times, which is a breakthrough over the traditional. This review aims to offer a comprehensive understanding for the water-tolerant solid acid catalysts in esterification.

Graphic Abstract

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来源期刊
Catalysis Surveys from Asia
Catalysis Surveys from Asia 化学-物理化学
CiteScore
4.80
自引率
0.00%
发文量
29
审稿时长
>12 weeks
期刊介绍: Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.
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