Dry reforming of methane over nanostructured Co/Y catalyst for hydrogen production: Effect of ultrasound irradiation and Co-loading on catalyst properties and performance

Impregnation vs. coprecipitation dispersion of Cr over TiO2 and ZrO2 used as active and stable nanocatalysts in oxidative dehydrogenation of ethane to ethylene by carbon dioxide

“…The peak at 2370 cm À1 is attributed to residual atmospheric CO 2 (ref. [66][67][68] or C-H stretching mode of atmospheric hydrocarbons on the surface of the catalysts. 69 Absorption peaks around 465 cm À1 are related to the anatase phase Ti-O metal oxides infrared vibrations.…”

Smart Designs of Zeolite-Based Catalysts for Dry Reforming of Methane: A Review

“…However, a conversion drop was shown at 850 °C due to the Co sintering. 121 For Pt/silicalite-1 catalysts, the CH 4 conversion was increased by 2 times with the temperature increasing from 570 to 620 °C. But a further increase of temperature to 670 °C caused a rapid deactivation in spite of the higher initial activity (Figure 11a).…”

“…155,156 Similarly in Co/zeolite Y, although 10% Co/zeolite Y exhibited a higher initial activity than 5% Co/zeolite Y owing to more active sites, a conversion drop was shown in the stability test, which was a result of the Co sintering and coke deposition in 10% Co/zeolite Y. 121 However, a small metal loading may hinder reactant activation.…”

Advanced zeolite and ordered mesoporous silica-based catalysts for the conversion of CO2to chemicals and fuels

“…The use of sonochemical, plasma and microwave for materials synthesis has much interest due to the impacts of these catalyst preparation methods on physicochemical properties such as the dispersion and stability of metal nanoparticles, surface areas, reduced particle sizes, higher homogeneity, softened synthesis conditions (time and temperature) and reduced cost. [887][888][889][890][891] Then, the effect of ultrasounds and Co-loading over the Y zeolite catalytic performance for DRM was shown to enhance the dispersion of Co nanoparticles and surface areas in comparison to impregnation methods, 892 and nanoparticles with an average crystallite size of around 30-40 nm were formed. The best catalytic results were obtained for the 10 wt% Co content at a reaction temperature of 850 1C.…”