TY - JOUR
T1 - Effect of ionic liquid on sugar-aromatic separation selectivity by metal-organic framework NU-1000 in aqueous solution
AU - Yabushita, Mizuho
AU - Papa, Gabriella
AU - Li, Peng
AU - Fukuoka, Atsushi
AU - Farha, Omar K.
AU - Simmons, Blake A.
AU - Katz, Alexander
N1 - Funding Information:
This research was supported by the funding from the Office of Basic Energy Sciences of the Department of Energy ( DE-FG02-05ER15696 ). O.K.F. gratefully acknowledges support from the Inorganometallic Catalyst Design Center, an Energy Frontier Research Center, funded by the U.S. Department of Energy , Office of Science, Basic Energy Sciences, under Award DESC0012702 . Appendix A
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/1
Y1 - 2020/1
N2 - Leveraging on previously observed selectivity in separating sugars from aromatics in aqueous solution via adsorption to metal-organic framework NU-1000, we investigate the effect of ionic liquid (IL) cosolvent on this separation. Four ILs (cholinium lysinate, cholinium phosphate, ethanolamine acetate, and ethanolamine phosphate) were investigated at concentrations of 0.4, 10, and 20 vol%. When treated with an aqueous IL mixture containing glucose, xylose, coumaric acid, and ferulic acid, highly selective sugar-aromatic separations were observed for NU-1000 at 0.4 vol% for both cholinium lysinate and ethanolamine acetate. In contrast, amorphous carbon under similar conditions lacked selectivity, adsorbing similar amounts of aromatics to NU-1000 while also adsorbing ≥96 mg gadsorbent−1 of sugars. These results parallel those previously observed in pure aqueous solution. At higher concentrations of IL, however, NU-1000 displayed ≥56 mg gadsorbent−1 of sugar uptakes for all ILs, with the largest sugar uptakes being observed for ethanolamine acetate. This mirrored results when treating NU-1000 with sugars and IL in aqueous solution, in the absence of aromatics, in a way that depended non-monotonically on the IL concentration. We implicate coadsorption of IL onto NU-1000 as the reason why selectivity in the presence of IL is lower than the selectivity in pure aqueous solution.
AB - Leveraging on previously observed selectivity in separating sugars from aromatics in aqueous solution via adsorption to metal-organic framework NU-1000, we investigate the effect of ionic liquid (IL) cosolvent on this separation. Four ILs (cholinium lysinate, cholinium phosphate, ethanolamine acetate, and ethanolamine phosphate) were investigated at concentrations of 0.4, 10, and 20 vol%. When treated with an aqueous IL mixture containing glucose, xylose, coumaric acid, and ferulic acid, highly selective sugar-aromatic separations were observed for NU-1000 at 0.4 vol% for both cholinium lysinate and ethanolamine acetate. In contrast, amorphous carbon under similar conditions lacked selectivity, adsorbing similar amounts of aromatics to NU-1000 while also adsorbing ≥96 mg gadsorbent−1 of sugars. These results parallel those previously observed in pure aqueous solution. At higher concentrations of IL, however, NU-1000 displayed ≥56 mg gadsorbent−1 of sugar uptakes for all ILs, with the largest sugar uptakes being observed for ethanolamine acetate. This mirrored results when treating NU-1000 with sugars and IL in aqueous solution, in the absence of aromatics, in a way that depended non-monotonically on the IL concentration. We implicate coadsorption of IL onto NU-1000 as the reason why selectivity in the presence of IL is lower than the selectivity in pure aqueous solution.
KW - Adsorption
KW - Biomass
KW - Ionic liquids
KW - Metal-organic framework
KW - Molecular recognition
KW - Separation
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U2 - 10.1016/j.fuproc.2019.106189
DO - 10.1016/j.fuproc.2019.106189
M3 - Article
AN - SCOPUS:85074127095
SN - 0378-3820
VL - 197
JO - Fuel Processing Technology
JF - Fuel Processing Technology
M1 - 106189
ER -