Steam reforming of ethylene over nickel based spinel oxides

Consequence of products from oxidative coupling of methane in a non-oxidative high temperature environment

“…NiAl 2 O 4 and MnCr 2 O 4 spinel oxides, which are candidate barrier layers in hydrocarbon steam crackers to prevent coke formation, were evaluated for the steam reforming of ethylene below 700 °C. 48,49 The present study revealed a unique challenge on oxides after OCM, which operates at high temperature (>800 °C).…”

Ultrasound-assisted sequentially precipitated nickel-silica catalysts and its application in the partial hydrogenation of edible oil

“…From the EDX and XPS analyses of the synthesised catalysts in Table 3 , it is apparent that they were constituted of the required elements to form the catalysts, which indicates the efficacy of the synthesis procedure. As the typical approximated penetration depth of an EDX electron beam is 0.4 μm [43] , the measured atomic percentage was considered to represent the bulk atomic percentage of the catalysts. On the other hand, characterisation by XPS detects the elemental composition of the samples at the surface layer, which corresponds to a penetration depth of approximately 1 – 12 nm, hence demonstrative of the superficial composition of the catalysts [43] .…”

“…As the typical approximated penetration depth of an EDX electron beam is 0.4 μm [43] , the measured atomic percentage was considered to represent the bulk atomic percentage of the catalysts. On the other hand, characterisation by XPS detects the elemental composition of the samples at the surface layer, which corresponds to a penetration depth of approximately 1 – 12 nm, hence demonstrative of the superficial composition of the catalysts [43] . As the catalysts investigated were all synthesised according to the same starting materials, it will be useful to draw comparisons based on their bulk and surface atomic distributions to ascertain the changes due to the difference in synthesis conditions.…”

Interface of Ni-MgCr2O4 Spinel Promotes the Autothermal Reforming of Acetic Acid through Accelerated Oxidation of Carbon-Containing Intermediate Species

“…Besides, as compared to the calcined catalysts, the diffraction peaks of hydrogen atmosphere. 45,46 46 With the introduction of Mg species, a low-temperature peak near 300 °C was observed, which could be assigned to the reduction of weakly bounded Ni 2+ particles over the catalyst surface. 48 Meanwhile, in comparison with that of the Ni-Cr 2 O 3 catalyst, stretched broad peaks were found around 425−800 °C, and the peaks near 640 and 780 °C could be attributed to reduction of the NiCr 2 O 4 spinel and the Mg(Ni)O solid solution, respectively.…”