Journal
CHEMICAL ENGINEERING SCIENCE
Volume 120, Issue -, Pages 59-66Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2014.08.003
Keywords
Metal-organic frameworks; Molecular simulation; Temperature swing adsorption; Thermal regeneration energy; Natural gas purification
Categories
Funding
- National Key Basic Research Program of China [2013CB733503]
- National Natural Science Foundation of China [21136001, 21121064, 21322603]
- Program for New Century Excellent Talents in University [NCET-12-0755]
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Molecular simulations were performed to investigate the performance of 151 metal-organic frameworks (MOFs) with large chemical and topological diversity on CO2/CH4 separation via temperature swing adsorption (TSA) process. The thermal regeneration energy was adopted in this work as an evaluation criterion and combined with other three commonly used ones (CO2 working capacity, adsorption selectivity and regenerability) to explore the structure-property relationships for the separation of the target system. The results show that the four evaluation criteria exhibit intimate correlations with the difference of adsorbility (Delta AD) of adsorbates but with non-concerted changing tendency. With a certain range of this parameter, it can be used as a good indicator for the preliminary screening of MOB and the tailoring of new materials. Furthermore, from the structural database considered in current study, Cu-TDPAT with strong CO2 adsorption sites was found to possess the best performance by taking the thermal and water-stable properties into account. (C) 2014 Elsevier Ltd. All rights reserved.
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