SO2 Capture at Low Pressure in a Prototypical MIL-53 Aluminum MOF Family: The Influence of Pore Expansion

Alfredo López-Olvera; J Antonio Zárate; Juan L Obeso; Elí Sánchez-González; José Antonio de Los Reyes; Ricardo A Peralta; Eduardo González-Zamora; Ilich A Ibarra

doi:10.1021/acs.inorgchem.3c03179

SO₂ Capture at Low Pressure in a Prototypical MIL-53 Aluminum MOF Family: The Influence of Pore Expansion

Inorg Chem. 2023 Dec 25;62(51):20901-20905. doi: 10.1021/acs.inorgchem.3c03179. Epub 2023 Dec 12.

Authors

Alfredo López-Olvera^{1

2}, J Antonio Zárate³, Juan L Obeso^{1

4}, Elí Sánchez-González¹, José Antonio de Los Reyes⁵, Ricardo A Peralta³, Eduardo González-Zamora³, Ilich A Ibarra^{1

6}

Affiliations

¹ Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Del Coyoacán, 04510 México D.F., México.
² Department of Materials and Environmental Chemistry, Stockholm University, Stockholm 106 91, Sweden.
³ Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C. P. 09340 Ciudad de México, México.
⁴ Instituto Politécnico Nacional, CICATA U. Legaria 694 Irrigación, Miguel Hidalgo, 11500 CDMX, México (Mexico).
⁵ Laboratory of Environmental Catalysis, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Ciudad de México 09340, México.
⁶ On sabbatical as "Catedra Dr. Douglas Hugh Everett" at Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Leyes de Reforma 1ra Seccion, Iztapalapa, C.P. 09310 Ciudad de México, Mexico.

PMID: 38085262
DOI: 10.1021/acs.inorgchem.3c03179

Abstract

Not only is excellent performance in SO₂ capture by porous materials (uptake above 17 mmol g^-1) relevant, but also finding a correlation between the architecture changes into a family and their SO₂ adsorption is very useful. In this contribution, we studied the SO₂ adsorption behavior (at very low pressure) of an Al(III)-MOF family that shares the pore architecture of MIL-53. The results indicate an inversely proportional trend for the SO₂ capture and pore expansion, since by increasing the length of the channel pore, the SO₂ uptake gradually decreases. In addition, this trend is clearly observed in the heat of adsorption, which describes the interaction between the SO₂ molecule and the μ-OH functional group. These finding are supported by experimental analysis and computational studies.