Modulating selectivity in CO2 Methanation through Rhodium catalysts supported on Zirconia-Chemically grafted SBA-15
Por:
Gómez-Flores K.A., Solís-García A., Lam S.A.J., Cervantes-Gaxiola M.E., Castillo-López R.I., Leyva J.P.R., Gómez S.A., Flores-Aquino E., Zepeda T.A.
Publicada:
1 ene 2024
Resumen:
This study presents the impact of ZrO2 incorporation on Rh-supported SBA-15 catalysts for CO2 hydrogenation. ZrO2 was chemically grafted onto the SBA-15 surface, varying concentrations of ZrO2 from 5 to 20 wt.%. The ZrO2-free catalyst favored CO production, leaning towards the reverse water gas shift reaction. The addition of ZrO2 notably enhanced catalytic activity and led to a significant shift in selectivity towards methane production. The selectivity modulation is linked with the modified surface of SBA-15, covered with a ZrO2 phase. The FTIR characterization under reaction conditions evidenced Rh-carbonyls formation in all samples. However, in catalysts materials with ZrO2, formate species are also formed, probably promoted by the Zr-OH groups. A linear relation between formate species and the CH4 selectivity suggests that the methane formation could be associated with the hydrogenation of formate species, while the desorption of carbonyls on Rh can explain the CO generation. © 2024 The Author(s)
Filiaciones:
Gómez-Flores K.A.:
Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Josefa Ortiz de Domínguez, Ciudad Universitaria, Sinaloa, Culiacán, 80013, Mexico
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Carretera Tijuana- Ensenada km 107, Ensenada B.C., 22800, Mexico
Solís-García A.:
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Carretera Tijuana- Ensenada km 107, Ensenada B.C., 22800, Mexico
Lam S.A.J.:
Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Josefa Ortiz de Domínguez, Ciudad Universitaria, Sinaloa, Culiacán, 80013, Mexico
Cervantes-Gaxiola M.E.:
Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Josefa Ortiz de Domínguez, Ciudad Universitaria, Sinaloa, Culiacán, 80013, Mexico
Castillo-López R.I.:
Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Josefa Ortiz de Domínguez, Ciudad Universitaria, Sinaloa, Culiacán, 80013, Mexico
Leyva J.P.R.:
Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Josefa Ortiz de Domínguez, Ciudad Universitaria, Sinaloa, Culiacán, 80013, Mexico
Gómez S.A.:
Departamento de Ingeniería de Procesos e Hidráulica, UAM–Iztapalapa, Av. San Rafael Atlixco No. 186, Ciudad de México, Col. Vicentina, 09340, Mexico
Flores-Aquino E.:
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Carretera Tijuana- Ensenada km 107, Ensenada B.C., 22800, Mexico
Zepeda T.A.:
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Carretera Tijuana- Ensenada km 107, Ensenada B.C., 22800, Mexico
hybrid, All Open Access; Hybrid Gold Open Access
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