Perovskite-type oxides in methane dry reforming: Effect of their incorporation into a mesoporous SBA-15 silica-host

Hydrogen and syngas production by methane dry reforming on SBA-15 supported nickel catalysts: On the effect of promotion by Ce0.75Zr0.25O2 mixed oxide

“…Thus, the high specific surface area, uniform two-dimensional hexagonal pore arrangements and narrow pore size distribution with large pore size (typically in the range of 5e30 nm) and thick walls (in the range of 3.1e6.4 nm) [41] make SBA-15 a promising support to obtain catalyst with high metal dispersion and uniform particles diameter. Rivas et al [43] have reported that the perovskitestype oxides, which are built-in the SBA-15 host, are more active than the bulk perovskites for methane dry reforming. Recently, Wan et al [46] have prepared Ce/SBA-15 supported nickel catalysts were promising catalysts for reforming of methane, because of the stability of those support during time on stream.…”

“…The aim of our paper is to combine the mesoporosity of the SBA-15 with the CeriaeZirconia support (CZ) as oxygen vacancies source and good resistance to carbonaceous deposits [37,43]. We investigate the influence of impregnation strategy on the physico-chemical properties, the morphology of Ni and CZ nanoparticles and the catalytic performances and stability of mesoporous supported nickel catalysts at low temperature (600 C) and the effect of CZ as promoter in methane dry reforming (MDR).…”

Biogas as a source of renewable syngas production: advances and challenges

“…The incorporation of Ni-based perovskite-type oxides LaNiO 3 , La 0.8 Ca 0.2 NiO 3 and La 0.8 Ca 0.2 Ni 0.6 Co 0.4 O 3 in the SBA-15 mesoporous silicahost gives rise to well-dispersed nano-metallic (Ni-Co) particles inside the mesoporous SBA-15 by decomposition and further reduction of the perovskite precursor [112]. The resulting catalytic materials recorded an increase in the conversion of CH 4 and CO 2 and in the H 2 /CO ratio compared with the corresponding unsupported perovskite, whereas there is a dilution effect exerted by the mesoporous material minimizing the heat diffusion problems related to this highly endothermic reaction.…”

Ni–Nb-Based Mixed Oxides Precursors for the Dry Reforming of Methane

“…The CH 4 and CO 2 conversions were defined as the CH 4 and CO 2 converted per total amount of CH 4 and CO 2 fed, respectively. The selectivity to CO was calculated based in carbon balance and defined as S CO (%) = g CO /[g CH 4 ðcÞ þ g CO 2 ðcÞ ] 9 100; while hydrogen selectivity was calculated as S H 2 (%) = [g H 2 /2g CH 4 ðcÞ ] 9 100, where g CO and g H 2 are the moles of CO and hydrogen produced and g CH 4 ðcÞ and g CO 2 ðcÞ are the amounts of methane and carbon dioxide converted, as described elsewhere [21]. Stability tests were performed at 700°C for 24 h. Carbon formation on the catalysts after reaction was determined by TGA-DTA analysis and compared to calculated values using the CO selectivity as reference, expressed as NC/N o = (1 -S CO )/(N CH 4 ðcÞ ?…”