Stability For Partial Oxidation Research Articles

Perovskite-type oxygen-permeable membrane BaCo0.7Fe0.2Nb0.1O3−δ for partial oxidation of methane in coke oven gas to hydrogen

Perovskite-type oxygen-permeable membrane reactors of BaCo0.7Fe0.2Nb0.1O3−δ (BCFNO) packed with Ru-based catalyst had high oxygen permeability and could be used for hydrogen production by partial oxidation of methane in coke oven gas (COG). At 1173 K, 94% of methane conversion, 85% of H2 selectivity, 107% of CO selectivity, and as high as 15.4 mL·cm−2·min−1 of oxygen permeation flux were obtained. The BCFNO membrane itself had poor catalytic activity to partial oxidation of CH4 in COG. During continuous operation for 70 h at 1173 K, no degradation of the membrane reaction performance was observed. XRD and SEM characterization also demonstrated that the BCFNO membrane reactor exhibited good stability in partial oxidation of methane in COG.

Partial Oxidation of Methane over Ni/SiO2

Ni catalyst (Ni: 15 wt%) supported on precalcined SiO2 has been investigated in reforming reactions of methane to synthesis gas. The catalyst exhibited fairly good activity and stability in partial oxidation of methane (POM), whereas it deactivated in steam reforming of methane (SRM). Pulse reaction results of CH4, O2, and CH4/O2 revealed that Ni/SiO2 has high capability to dissociate methane. The results also revealed that both CH4 and O2 are activated on the surface of metallic Ni, and then surface carbon species react with adsorbed oxygen to produce CO and CO2 depending on the bond strength of the oxygen species on the catalyst surface.

Partial Oxidation of Methane over Ni/θ-Al2O3 Catalysts

Abstract Ni/θ-Al2O3 exhibits remarkably high catalytic activity and stability in partial oxidation of methane to synthesis gas. It gives more than 98% CH4 conversion, 98% H2 selectivity and 100% CO selectivity at 850 °C and the activity was maintained for 100 h.

Partial Oxidation of Methane over Ni Catalysts Supported on Ce-ZrO2 Mixed Oxide

Abstract A novel catalyst, Ni/Ce-ZrO2 exhibits very high catalytic activity and stability in partial oxidation of methane to synthesis gas. It gives 99.6% CH4 conversion at 850 °C and the activity was maintained for 100 h.