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

• 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

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.

在过去的几十年里，新型纳米多孔吸附剂和催化剂的开发有了显著的增长。其中最有前途的包括分子筛，从微孔沸石和碳分子筛开始，直到上世纪最后十年，它们一直占据着该领域的主导地位。自20世纪90年代初以来，一系列新的纳米多孔材料被开发出来，包括周期性介孔筛子（PMS）、周期性介孔有机硅酸盐（PMO）、分层沸石、金属有机骨架（MOF）以及这些材料的各种杂化和功能化衍生物。由于其中一些材料可能存在大量的化学成分和结构，例如，可以制造几乎无限数量的MOF，每个MOF都具有不同的性能特征，因此需要开发技术来使用小样本量快速表征材料并允许易于解释结果。吸附平衡、动力学和动态测量传统上是通过重量法、体积法和填充柱流技术进行的。这些技术是直接和准确的，但它们是耗时的，并且需要相对大量的吸附剂样品（通常是颗粒形式），并且不太适合吸附剂快速筛选研究，其中准确性不太重要。