INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Mechanistic approach of CO2-Storage and Regeneration process using Ni-modified unsupported model catalyst
Autor/es:
DIANA PELTZER; MARINA CORTÉS-REYES; LUIS JOSÉ ALEMANY; SERGIO MOLINA RAMÍREZ; CONCEPCIÓN HERRERA-DELGADO; LAURA CORNAGLIA; MARIA ÁNGELES LARRUBIA
Lugar:
Puerto Vallarta
Reunión:
Congreso; XXVII CONGRESO IBEROAMERICANO DE CATÁLISIS; 2020
Institución organizadora:
ACAT
Resumen:
This work presents a mechanistic approach of a CO2-Storage and Regeneration process using unsupported Ni-Ba as model catalyst. The material was synthesized by coprecipitation, adding colloidal SiO2 as surfacepromoter, and calcined at 800 ºC. The solid was characterized by N2 sorptometry at 77K and XRD. Themechanistic study was performed by isotopic and non-isotopic catalytic tests of CO2 storage and regenerationsteps with CH4, using Transient Response Method (TRM).The catalyst presented good textural properties, and the formation of an isostructural [NiBa]O mixed cubicstructure (with an average crystal size of 15 nm) was detected by XRD. Non-isotopic tests confirmed the CO2adsorption and reduction with CO generation during the storage step. Moreover, H2 and CO were producedduring the regeneration step, through in situ dry reforming of methane and catalytic CH4 decomposition. Theisotopic experiments with 13CO2 allowed distinguishing the different C sources and the predominant reactionsin each step. According to this mechanistic approach, the CO2 reduction during the storage step would oxidizethe Ni present in the catalyst, while the H2 generated during the methane step would favor its reduction. Thegood redox properties allow the material working on a chemical loop, catalyzing the reactions in every step.