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Adsorption of CO on amine-functionalized green metal-organic framework: an interaction between amine and CO molecules. | LitMetric
The efficient capture of CO is a critical problem for porous adsorbents. The inadequacy of conventional adsorbents has low adsorption capacity towards CO removal. Metal organic frame work has been considered as very effective for CO adsorption as it shows higher rate of CO adsorption at room temperature. In conventional amine processes, a comparatively high energy penalty is required, whereas a novel class of metal-organic framework by the combination of amine solvent have improve the potential of adsorption process and also the efficiency of separation. Amine-functionalized MOFs become more fascinated due to strong interaction between carbon dioxide and amine-functionalized MOF. A renewable green γCD-MOF was synthesized by using vapor diffusion method. Post-synthetic modification of γCD-MOF was done with piperazine and analyzed to expose its crystalline structure, morphology, and porous structure. The main aim of this paper is to enhance the CO adsorption by functionalization of inexpensive, green, nanoporous γCD-MOF and also to highlight the effects of amine-based functionalization towards potential application. Gravimetric CO adsorption isotherms for γCD-MOF, pip-γCD-MOF are reported up to 60 °C and found to follow a pseudo-second-order reaction. The pip-γCD-MOF confirms comparatively increased rapid adsorption rate of CO than that of γCD-MOF and desorption of CO, and need less energy for regeneration. These results are the complete evidence of piperazine as an efficient amine group for increasing the CO adsorption uptake capacity.
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