Fast screening of adsorbents: from equilibrium and kinetics to bench scale process tests

吸附剂的快速筛选：从平衡和动力学到小规模工艺测试

基本信息

批准号：
RGPIN-2016-04353
负责人：
Eic, Mladen
金额：
$ 2.04万
依托单位：
University of New Brunswick
依托单位国家：
加拿大
项目类别：
Discovery Grants Program - Individual
财政年份：
2017
资助国家：
加拿大
起止时间：
2017-01-01 至 2018-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=637996
关键词：
Fast screening adsorbents equilibrium kinetics

项目摘要

The last several decades have have seen a dramatic increase in the development of new nanoporous adsorbents and catalysts. The most promising among them include molecular sieves, starting with microporous zeolites and carbon molecular sieve, which dominated the field until the last decade of the last century. Since the early 1990's a whole new array of other nanoporous materials have been developed including periodic mesoporous sieves (PMS), periodic mesoporous organosilicates (PMO's), hierarchycal zeolites, metal organic frameworks (MOF's) and a variety of hybrid and functionalized variants of these materials. Due to the large number of possible chemical compositions and structures of some of these materials, e.g., a near infinite number of MOF's can be made- each with different performance characteristics, there is a requirement for developing techniques to characterize materials rapidly using small sample quantities and allowing easy interpretation of the results. Adsorption equilibrium, kinetics and dynamic measurements have traditionally been carried out by gravimetric, volumetric and packed column flow techniques. These techniques are straightforward and accurate, but they are time consuming and require relatively large amounts of adsorbent samples (often in pelleted form) and are not well-suited to adsorbent rapid screening studies, where accuracy is less critical.

过去几十年来，新型纳米多孔吸附剂和催化剂的开发急剧增加。其中最有前途的是分子筛，从微孔沸石和碳分子筛开始，直到上世纪最后十年，它们一直在该领域占据主导地位。自 1990 年代初以来，开发了一系列全新的其他纳米多孔材料，包括周期性介孔筛 (PMS)、周期性介孔有机硅酸盐 (PMO)、多级沸石、金属有机框架 (MOF) 以及这些材料的各种混合和功能化变体。由于其中一些材料有大量可能的化学成分和结构，例如，可以制造几乎无限数量的 MOF，每种材料都具有不同的性能特征，因此需要开发使用小样本量快速表征材料的技术并可以轻松解释结果。吸附平衡、动力学和动态测量传统上是通过重量分析、体积分析和填充柱流动技术进行的。这些技术简单、准确，但耗时且需要相对大量的吸附剂样品（通常为颗粒形式），并且不太适合精度不太重要的吸附剂快速筛选研究。