Chanut Nicolas, Bourrelly Sandrine, Kuchta Bogdan, Serre Christian, Chang Jong-San, Wright Paul A, Llewellyn Philip L
Aix-Marseille University, CNRS, MADIREL (UMR 7246), Centre de St Jérôme, 13013, Marseille, France.
Institut des Matériaux Poreux de Paris, Ecole Normale Supérieure, Ecole Supérieure de Physique et de Chimie Industrielles de Paris, FRE CNRS 2000, PSL Research University, 75005, Paris, France.
ChemSusChem. 2017 Apr 10;10(7):1543-1553. doi: 10.1002/cssc.201601816. Epub 2017 Mar 2.
A simple laboratory-scale protocol that enables the evaluation of the effect of adsorbed water on CO uptake is proposed. 45 metal-organic frameworks (MOFs) were compared against reference zeolites and active carbons. It is possible to classify materials with different trends in CO uptake with varying amounts of pre-adsorbed water, including cases in which an increase in CO uptake is observed for samples with a given amount of pre-adsorbed water. Comparing loss in CO uptake between "wet" and "dry" samples with the Henry constant calculated from the water adsorption isotherm results in a semi-logarithmic trend for the majority of samples allowing predictions to be made. Outliers from this trend may be of particular interest and an explanation for the behaviour for each of the outliers is proposed. This thus leads to propositions for designing or choosing MOFs for CO capture in applications where humidity is present.
提出了一种简单的实验室规模方案，用于评估吸附水对一氧化碳吸收的影响。将45种金属有机框架（MOF）与参考沸石和活性炭进行了比较。根据预吸附水量的不同，对一氧化碳吸收具有不同趋势的材料进行分类是可行的，包括在给定预吸附水量的样品中观察到一氧化碳吸收增加的情况。将“湿”样品和“干”样品之间一氧化碳吸收的损失与根据水吸附等温线计算的亨利常数进行比较，大多数样品呈现半对数趋势，从而能够进行预测。偏离此趋势的异常值可能特别值得关注，并针对每个异常值的行为提出了解释。因此，这为在存在湿度的应用中设计或选择用于捕获一氧化碳的金属有机框架提出了建议。
