Adsorption of gases on small–pore aluminum bisphosphonate MOF MIL–91(Al)

In this work, the adsorption isotherms of small pore bisphosphonate MOF MIL–91(Al) was evaluated for permanent gases viz. , CO 2 , CO, N 2 , CH 4 , C 2 H 6 and C 3 H 8 . Gravimetric adsorption measurements were performed at three different temperatures 294, 318, 358 K and a wide range of pressures....

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Bibliographic Details
Published in:Journal of chemical sciences (Bangalore, India) India), 2021-12, Vol.133 (4), Article 100
Main Authors: Medikonda, Prudhviraj, Pilli, Rajsekhar, Sastri, Chivukula V, Gumma, Sasidhar
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aluminum
Beyond Classical Chemistry
Bisphosphonates
Carbon dioxide
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Enthalpy
Gas separation
Isotherms
Methane
Phosphonates
Regular Article
Selectivity
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Summary:In this work, the adsorption isotherms of small pore bisphosphonate MOF MIL–91(Al) was evaluated for permanent gases viz. , CO 2 , CO, N 2 , CH 4 , C 2 H 6 and C 3 H 8 . Gravimetric adsorption measurements were performed at three different temperatures 294, 318, 358 K and a wide range of pressures. For all measured gases type–1 adsorption isotherm was observed. Isotherms were modeled using the Virial equation and calculated fit parameters were used to calculate the enthalpy of adsorption. CO 2 exhibits moderate enthalpy of adsorption along with excellent selectivity on MIL–91 (Al), thereby making it an attractive adsorbent for gas separation applications. Graphic abstract A small pore bisphosphonate MIL–91(Al) is one of the few porous phosphonate MOFs studied so far on adsorption. Ideal Adsorbed Solution Theory predictions show that CO 2 exhibits excellent selectivity over CO, CH 4 and N 2 , making it an attractive adsorbent for gas separation applications.
ISSN:0974-3626
0973-7103
DOI:10.1007/s12039-021-01964-9