Synthesis, characterization, and application of ruthenium-doped SrTiO3 perovskite catalysts for microwave-assisted methane dry reforming

Gangurde, L.S. ; Sturm, G.S.J. ; Valero-Romero, M.J. ; Mallada, R. (Universidad de Zaragoza) ; Santamaria, J. (Universidad de Zaragoza) ; Stankiewicz, A.I. ; Stefanidis, G.D.

Resumen: A series of ruthenium-doped strontium titanate (SrTiO3) perovskite catalysts were synthesized by conventional and microwave-assisted hydrothermal methods. The structure was analyzed by X-Ray diffraction (XRD) confirming the formation of the perovskite phase with some TiO2 anatase phase in all the catalysts. Microwave irradiation decreases the temperature and time of synthesis from 220 °C for 24 h (conventional heating) to 180 °C for 1h, without affecting the formation of perovskite. A 7 wt. % ruthenium-doped SrTiO3 catalyst showed the best dielectric properties, and thus its catalytic activity was evaluated for the methane dry reforming reaction under microwave heating in a custom fixed-bed quartz reactor. Microwave power, CH4:CO2 vol. % feed ratio and gas hourly space velocity (GHSV) were varied in order to determine the best conditions for performing dry reforming with high reactants conversions and H2/CO ratio. Stable maximum CH4 and CO2 conversions of ~99.5% and ~94%, respectively, at H2/CO ~0.9 were possible to reach with the 7 wt. % ruthenium-doped SrTiO3 catalyst exposed to maximum temperatures in the vicinity of 940 °C. A comparative theoretical scale-up study shows significant improvement in H2 production capability in the case of the perovskite catalyst compared to carbon-based catalysts.

Idioma: Inglés

DOI: 10.1016/j.cep.2018.03.024

Año: 2018

Publicado en: CHEMICAL ENGINEERING AND PROCESSING 127 (2018), 178-190
ISSN: 0255-2701

Factor impacto JCR: 3.031 (2018)

Categ. JCR: ENGINEERING, CHEMICAL rank: 45 / 138 = 0.326 (2018) - Q2 - T1
Categ. JCR: ENERGY & FUELS rank: 51 / 103 = 0.495 (2018) - Q2 - T2

Factor impacto SCIMAGO: 0.789 - Chemical Engineering (miscellaneous) (Q1) - Chemistry (miscellaneous) (Q1) - Process Chemistry and Technology (Q1) - Industrial and Manufacturing Engineering (Q1) - Energy Engineering and Power Technology (Q1)

Financiación: info:eu-repo/grantAgreement/EC/FP7/267348/EU/Towards Perfect Chemical Reactors:Engineering the Enhanced Control of Reaction Pathways at Molecular Level via Fundamental Concepts of Process Intensification/TOPCHEM

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)