| Microporous Metal Organic Frameworks (MMOFs) materials are very effective and efficient adsorbents for gas adsorption and separation due to their high surface area, large pore volume and relative low heat capacity. In this work, we focus on small gases and hydrocarbon adsorption and separation properties in MMOFs which typically have pore size smaller than 20Å. Nitrogen and argon adsorption isotherms were collected at 77K and 87K respectively for porosity characterization, e. g. surface area, pore volume and pore size distribution. Single component isotherms of small gases of CO2, N2, O2, H2, O2, Alkanes (C nH2n+2) and Alkenes (CnH2n) were collected at ambient condition to preliminarily evaluate gas adsorption and separation properties. After screening, mixed gas adsorption and breakthrough experiment were performed using promising MMOFs candidates in order to mimic the real world situation. Besides experiment, molecular simulation was studied in aid of learning adsorption behavior and separation mechanism in depth. An interesting phenomena, so called “commensurate adsorption”, was recognized and summarized in this thesis. |
