Insight and comprehensive study of Ni-based catalysts supported on various metal oxides for CO methanation.

In this study, nickel supported on various metal oxides were prepared by simple impregnation and the performance for CO methanation was tested. The oxide supports were all prepared by thermal decomposition of metal salts to provide comparable oxide properties such as surface area. Among the investigated oxides, nickel supported on CeO and YO showed the highest CO conversion of 90% at 320 °C with highest CH selectivity of 99%.

The improvement of heat transfer using Co/SiO spiral structured catalyst for green diesel production by Fischer-Tropsch synthesis.

In this study, the improvement of heat transfer was applied to eliminate hotspots of a highly exothermic reaction, Fischer-Tropsch synthesis (FTS), by means of two facile methods: (I) adding high thermal conductive materials media diluted in catalysts (SiC and Al chips), and (II) using structured reactors equipped with well-designed structured catalysts with advantages of heat dissipation/removal. The 20%Co/SiO catalyst powder prepared by simple impregnation was employed for constructing structured catalysts and granular packed bed catalysts. The structured catalyst was prepared by coating method of Co/SiO slurry on an aluminum spiral and plate substrate.

Simultaneous production of syngas and carbon nanotubes from CO/CH mixture over high-performance NiMo/MgO catalyst.

Direct conversion of biogas via the integrative process of dry reforming of methane (DRM) and catalytic methane decomposition (CDM) has received a great attention as a promising green catalytic process for simultaneous production of syngas and carbon nanotubes (CNTs). In this work, the effects of reaction temperature of 700-1100 °C and CH/CO ratio of biogas were investigated over NiMo/MgO catalyst in a fixed bed reactor under industrial feed condition of pure biogas. The reaction at 700 °C showed a rapid catalyst deactivation within 3 h due to the formation of amorphous carbon on catalyst surface.

One-Step Synthesis of Fragment-Reduced Graphene Oxide as an Electrode Material for Supercapacitors.

We herein report for the first time a simple environmentally friendly hydrothermal method for one-step synthesis of fragment-reduced graphene oxide (FrGO) under mild conditions without the addition of reducing agents, and we applied it as an electrode material for a supercapacitor. The characterization results show that the introduction of AlO as a spacer and HCl as an etchant results in a macroporous/mesoporous structure, increases the fragmentation of the FrGO microtopography, shortens the electron/ion transport path, and increases the contact between the electrode material and the electrolyte. Compared to the traditional hydrothermal reduced graphene materials, FrGO shows a larger specific capacitance.

Development of Ni-Mo carbide catalyst for production of syngas and CNTs by dry reforming of biogas.

Biogas has been widely regarded as a promising source of renewable energy. Recently, the direct conversion of biogas over heterogeneous catalysts for the simultaneous production of syngas and carbon nanotubes exhibits a high potential for full utilization of biogas with great benefits. Involving the combined dry reforming of methane and catalytic decomposition of methane, the efficiency of process is strongly depended on the catalyst activity/stability, mainly caused by carbon deposition.