Regeneration performance of metal–organic frameworks

Izabela Majchrzak-Kucęba,Dominika Bukalak-Gaik

doi:10.1007/s10973-016-5624-2

Izabela Majchrzak-Kucęba, Dominika Bukalak-Gaik

Open Access

https://doi.org/10.1007/s10973-016-5624-2

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Abstract

The increasing attractiveness of the adsorption methods of CO2 capturing from coal power plant flue gas, which can be observed in recent years, is linked directly with the appearance and development of new, efficient CO2 adsorbents. The success of an adsorbent depends on the development of the material that, under flue gas temperature conditions, will have high sorption capacity and selectivity for CO2. At the same time, the ease of regeneration and the usable lifetime of the adsorbent are of key importance. The paper presents the potential of metal–organic frameworks (MOFs) for VPSA method for flue gas CO2 capture. In this study, the thermogravimetric test has been used to screen two kind of MOFs [CuBTC, MIL-53(Al)] and identification of promising materials for CO2 capture. The examination of the sorption capacity, stability and regeneration performance of metal–organic frameworks was carried out using a Mettler TGA/SDTA 851e thermobalance and TG-Vacuum system. The studies of adsorption/desorption on the MOFs showed complete desorption of CO2, which confirmed the reversible nature of the process and the ability to use in multiple cycles in VPSA unit.

Highlights

The increasing attractiveness of the adsorption methods of CO2 capturing from coal power plant flue gas, which can be observed in recent years, is linked directly with the appearance and development of new, efficient CO2 adsorbents
The studies of adsorption/desorption on the metal–organic frameworks (MOFs) showed complete desorption of CO2, which confirmed the reversible nature of the process and the ability to use in multiple cycles in VPSA unit
The increasing attractiveness of the VPSA (Vacuum Pressure Swing Adsorption) method of CO2 capturing from coal power plant flue gas, which can be observed in recent years, is linked directly with the appearance of new, efficient CO2 adsorbents such as metal–organic frameworks (MOFs) [1]

Summary

Introduction

The increasing attractiveness of the VPSA (Vacuum Pressure Swing Adsorption) method of CO2 capturing from coal power plant flue gas (compared to the preferred currently absorption methods), which can be observed in recent years, is linked directly with the appearance of new, efficient CO2 adsorbents such as metal–organic frameworks (MOFs) [1]. To be used in the VPSA adsorption method, an ideal adsorbent should exhibit high selectivity and sorption capacity with respect to CO2 and easy regeneration and stability during extensive adsorption– desorption cycling. Only activated carbons and zeolites can be used for a large-scale VPSA units [2,3,4]. The metal–organic frameworks (MOFs) are a new class of nanoporous solids proposed to be used in adsorption VPSA units [5]. The majority of MOFs exhibit high sorption capacity with respect to CO2 in a higher pressure range (of up to 42 bar), excelling other physical adsorbents, such as zeolites and activated carbons. The heat needed for the desorption of CO2 from these compounds is significantly lower than that of zeolites

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