In this section
@article{Evans:2020:10.1039/C9RA10115B,
author = {Evans, A and Cummings, M and Decarolis, D and Gianolio, D and Shahid, S and Attfield, M and Law, G and Petit, C},
doi = {10.1039/C9RA10115B},
journal = {RSC Advances: an international journal to further the chemical sciences},
pages = {5152--5162},
title = {Optimisation of Cu+ impregnation of MOF-74 to improve CO/N2 and CO/CO2 separations},
url = {http://dx.doi.org/10.1039/C9RA10115B},
volume = {10},
year = {2020}
}
TY - JOUR
AB - Carbon monoxide (CO) purification from syngas impurities is a highly energy and cost intensive process. Adsorption separation using metal–organic frameworks (MOFs) is being explored as an alternative technology for CO/nitrogen (N2) and CO/carbon dioxide (CO2) separation. Currently, MOFs' uptake and selectivity levels do not justify displacement of the current commercially available technologies. Herein, we have impregnated a leading MOF candidate for CO purification, i.e. M-MOF-74 (M = Co or Ni), with Cu+ sites. Cu+ allows strong π-complexation from the 3d electrons with CO, potentially enhancing the separation performance. We have optimised the Cu loading procedure and confirmed the presence of the Cu+ sites using X-ray absorption fine structure analysis (XAFS). In situ XAFS and diffuse reflectance infrared Fourier Transform spectroscopy analyses have demonstrated Cu+–CO binding. The dynamic breakthrough measurements showed an improvement in CO/N2 and CO/CO2 separations upon Cu impregnation. This is because Cu sites do not block the MOF metal sites but rather increase the number of sites available for interactions with CO, and decrease the surface area/porosity available for adsorption of the lighter component.
AU - Evans,A
AU - Cummings,M
AU - Decarolis,D
AU - Gianolio,D
AU - Shahid,S
AU - Attfield,M
AU - Law,G
AU - Petit,C
DO - 10.1039/C9RA10115B
EP - 5162
PY - 2020///
SN - 2046-2069
SP - 5152
TI - Optimisation of Cu+ impregnation of MOF-74 to improve CO/N2 and CO/CO2 separations
T2 - RSC Advances: an international journal to further the chemical sciences
UR - http://dx.doi.org/10.1039/C9RA10115B
UR - http://hdl.handle.net/10044/1/77308
VL - 10
ER -