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Title: Synergistic Effect of Mixed Oxide on the Adsorption of Ammonia with Metal–Organic Frameworks

A hydrotalcite-derived MgAl oxide (MMO) was evaluated in combination with the metal–organic frameworks (MOFs) UiO-66 and UiO-66-NH 2 for the adsorption of ammonia. Analysis of the materials’ textural properties after ammonia breakthrough adsorption revealed no change in the PXRD patterns or FTIR spectra; however, a slight decrease in surface area was observed, consistent with the hypothesized presence of strongly adsorbed species after adsorption. UiO-66:MMO and UiO-66-NH 2:MMO composites maintained ammonia adsorption capacity under dry conditions. An almost 2-fold increase in humid ammonia capacity was observed for the UiO-66:MMO composite, far beyond that expected through a linear combination of the two materials’ capacities. As a result, the synergistic effect observed in humid conditions was further investigated with water adsorption experiments, which suggested the effect is the result of the high water affinity of MMO.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Georgia Inst. of Technology, Atlanta, GA (United States)
Publication Date:
Grant/Contract Number:
SC0012577
Type:
Published Article
Journal Name:
Industrial and Engineering Chemistry Research
Additional Journal Information:
Journal Volume: 55; Journal Issue: 22; Journal ID: ISSN 0888-5885
Publisher:
American Chemical Society (ACS)
Research Org:
Georgia Inst. of Technology, Atlanta, GA (United States); Georgia Tech Univ., Atlanta, GA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE
OSTI Identifier:
1254675
Alternate Identifier(s):
OSTI ID: 1256475; OSTI ID: 1258465

Mounfield, III, William P., Taborga Claure, Micaela, Agrawal, Pradeep K., Jones, Christopher W., and Walton, Krista S.. Synergistic Effect of Mixed Oxide on the Adsorption of Ammonia with Metal–Organic Frameworks. United States: N. p., Web. doi:10.1021/acs.iecr.6b01045.
Mounfield, III, William P., Taborga Claure, Micaela, Agrawal, Pradeep K., Jones, Christopher W., & Walton, Krista S.. Synergistic Effect of Mixed Oxide on the Adsorption of Ammonia with Metal–Organic Frameworks. United States. doi:10.1021/acs.iecr.6b01045.
Mounfield, III, William P., Taborga Claure, Micaela, Agrawal, Pradeep K., Jones, Christopher W., and Walton, Krista S.. 2016. "Synergistic Effect of Mixed Oxide on the Adsorption of Ammonia with Metal–Organic Frameworks". United States. doi:10.1021/acs.iecr.6b01045.
@article{osti_1254675,
title = {Synergistic Effect of Mixed Oxide on the Adsorption of Ammonia with Metal–Organic Frameworks},
author = {Mounfield, III, William P. and Taborga Claure, Micaela and Agrawal, Pradeep K. and Jones, Christopher W. and Walton, Krista S.},
abstractNote = {A hydrotalcite-derived MgAl oxide (MMO) was evaluated in combination with the metal–organic frameworks (MOFs) UiO-66 and UiO-66-NH2 for the adsorption of ammonia. Analysis of the materials’ textural properties after ammonia breakthrough adsorption revealed no change in the PXRD patterns or FTIR spectra; however, a slight decrease in surface area was observed, consistent with the hypothesized presence of strongly adsorbed species after adsorption. UiO-66:MMO and UiO-66-NH2:MMO composites maintained ammonia adsorption capacity under dry conditions. An almost 2-fold increase in humid ammonia capacity was observed for the UiO-66:MMO composite, far beyond that expected through a linear combination of the two materials’ capacities. As a result, the synergistic effect observed in humid conditions was further investigated with water adsorption experiments, which suggested the effect is the result of the high water affinity of MMO.},
doi = {10.1021/acs.iecr.6b01045},
journal = {Industrial and Engineering Chemistry Research},
number = 22,
volume = 55,
place = {United States},
year = {2016},
month = {6}
}