TY - JOUR
T1 - Synthesis, characterization, and application of ruthenium-doped SrTiO3 perovskite catalysts for microwave-assisted methane dry reforming
AU - Gangurde, Lalit S.
AU - Sturm, Guido S.J.
AU - Valero-Romero, M. J.
AU - Mallada, Reyes
AU - Santamaria, Jesus
AU - Stankiewicz, Andrzej I.
AU - Stefanidis, Georgios D.
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
KW - Dielectric properties measurements
KW - Methane dry reforming
KW - Microwaves
KW - Perovskite catalysts
UR - http://resolver.tudelft.nl/uuid:13f52b24-c61f-4f12-93a3-0da43b96d54d
UR - http://www.scopus.com/inward/record.url?scp=85044937307&partnerID=8YFLogxK
U2 - 10.1016/j.cep.2018.03.024
DO - 10.1016/j.cep.2018.03.024
M3 - Article
AN - SCOPUS:85044937307
SN - 0255-2701
VL - 127
SP - 178
EP - 190
JO - Chemical Engineering and Processing - Process Intensification
JF - Chemical Engineering and Processing - Process Intensification
ER -