Platinum supported on alkaline and alkaline earth metal-doped alumina as catalysts for dry reforming and partial oxidation of methane

Energy efficient methane tri-reforming for synthesis gas production over highly coke resistant nanocrystalline Ni–ZrO2 catalyst

“…10). The conversion of reactants and selectivity of the products was dependent on number of active sites, size of the active metal (Ni) and the reducibility of the active (Ni) species [59,60,66,[73][74][75][76]. With increasing wt% of Ni loading Ni dispersion was increased upto 3.0 wt% Ni but above that the Ni dispersion was found to be decreasing.…”

“…ZrO 2 has high thermal stability and ionic conductivity due to its tendency to form defects and surface oxygen vacancies [78]. Moreover ZrO 2 favors surface oxygen production by dissociative adsorption of CO 2 [75]. Fig.…”

Magnesium-based systems for carbon dioxide capture, storage and recycling: from leaves to synthetic nanostructured materials

“…The effect of the promoter was found to be strongly dependent on the ratio of the additive to the active metal. 28 For example, studies of Na, K, Mg as additive in Pt/Al 2 O 3 , 214 indicated as Mg causes the higher increase in the activity with respect to the doped Na and K catalysts for 0.02% and 5 0.1%Pt/Al 2 O 3 systems, whereas for 0.5%Pt/Al 2 O 3 the K-doped systems showed higher performances. Nevertheless, for the 0.5%Pt/Al 2 O 3 no deactivation was observed in any case, suggesting also a difference in the particle aggregation in this case.…”

Is dry reforming the solution to reduce natural gas carbon footprint?

“…In the latter case, it requires high temperatures (1300°C-1400°C) to achieve high conversions. Catalytical POX has the advantage of operating at lower temperatures and contact times, which implies small reactors with fast start-ups [14]. Nevertheless, the exothermicity of the combustion reaction limits the application of this process.…”

“…However, the catalysts generally used in DRM suffers from fast deactivation mostly due to sintering in the high temperatures of reaction and carbon deposition via side reactions, such as methane cracking (eqn 6) and Boudouard reaction (eqn 7). [14] investigated the performance of a platinum catalyst with metal loadings varying between 0.02, 0.1 and 0.5 wt.%. They observed that methane conversion increased with platinum content.…”