Two representative metal�organic frameworks, Zn4O(BTB)2 (BTB3- = 1,3,5-benzenetribenzoate; MOF-177) and Mg2(dobdc) (dobdc4- = 2,5-dioxido-1,4-benzenedicarboxylate; Mg-MOF-74), were evaluated in detail for their use in post-combustion CO2 capture via temperature swing adsorption. These results show that strong CO2 adsorption sites are essential, and present a methodology for the evaluation of new adsorbents via analysis of single-component isotherms. In developing new frameworks with improved properties for CO2 capture, however, measuring adsorption isotherms is often a rate-limiting step. In order to more rapidly identify the most promising adsorbents, a high-throughput gas adsorption instrument capable of simultaneously measuring 28 single-component isotherms has been developed. For realistic CO2 capture applications, it is also important to consider the effects of minor flue gas components, including H2O, SOx, NOx, and O2. To this end, the development of a second high-throughput instrument capable of directly measuring multi-component equilibrium adsorption isotherms under realistic flue gas conditions will be discussed.

Evaluating metal-organic frameworks for post-combustion carbon dioxide capture via high-throughput adsorption measurements

245th National Meeting (2013)

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