Combustion synthesis of copper–nickel catalysts for hydrogen production from ethanol

Abstract

Cu and Ni based catalysts were synthesized using solution combustion synthesis method.The catalytic activity and hydrogen selectivity were investigated for ethanol decomposition reaction. The amount of fuel content in the combustion solution was found to greatly affect the phase and the microstructure of the synthesized catalyst. In situ x-ray absorption spectroscopy (XAS) studies were carried out to study the reduction of the catalyst containing mixed oxides of copper and nickel. The reduced catalyst was further subjected to an oxidizing environment to collect the in-situ XAS data during the oxidation of the catalyst. These investigations show that the catalyst oxidation state changes rapidly in the first few minutes of the pretreatment process and then gradually slows downs.

Process simulation and optimisation of H2 production from ethanol steam reforming and its use in fuel cells. 1. Thermodynamic and kinetic analysis

“…on the presence of inert gases [17,23,24]. Different H 2 purification stages should follow the steam reforming reactor based on this, such as a "reacting route", based on a series of reactors to obtain pure H 2 or reformate with the desired composition (mainly low CO concentration for application in some fuel cells) or a physical one (e.g.…”

Scalable synthetic method for SOFC compounds

“…These necessities are originated from the demands for appropriate industrial production procedure of SOFC materials, and the respective final products. Therefore, Combustion Synthesis (CS) is an important method for advanced SOFC component fabrication, because is economical and energy efficient method [1].…”

Single-Step Production of Nanostructured Copper-Nickel (CuNi) and Copper-Nickel-Indium (CuNiIn) Alloy Particles

“…[1][2][3][4] Among various nanoalloys, CuNi and CuNiIn alloy particles received particular interest in the recent years due to their unique properties. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] In the case of CuNi alloys, a high corrosion and wear resistant can be seen, as well as excellent electrical and thermal conductivity. The outstanding characteristics make these alloy particles a significant raw material for various industries from powder metallurgy to marine and aviation sectors.…”

“…The outstanding characteristics make these alloy particles a significant raw material for various industries from powder metallurgy to marine and aviation sectors. [4,[14][15][16][17][18][19][20] Recently, CuNi alloy particles were found to be a promising catalyzer in chemical reactions, such as ethanol hydrogenation/dehydrogenation and hydrogenolysis of C-C bond, [5] hydrogen production from methane [6] and ethanol, [7] higher alcohol synthesis and water-gas shift, [8] steam reforming, methane reforming, methane and methanol partial oxidation, CO and CO 2 hydrogenations, and NO x reduction due to their improved activity, selectivity and stability. [14] Additionally, CuNi alloy particles appear in energy applications as a catalyzer for direct oxidation of methane in solid oxide fuel cells due to their good catalytic activities, [4,15] front electrode onto a crystalline solar cell due to the low resistance and high performance.…”

“…The particles are applied to turbine engine blade roots or disks' slots as well as expansion joints or compressor air seals. [21][22][23][24][25] Several methods have been studied to prepare nanostructured CuNi and CuNiIn alloy particles including polyol synthesis, [6] wetness impregnation, [8] micro-emulsion method, [9] mechanical milling, [17] arc plasma evaporation, [26] electro deposition, [27][28][29][30] atomization, [31] reduction of metal oxides by mechanical and chemical routes, [32] mild hydrothermal synthesis, [33] hydrothermal reduction, [34] solution combustion synthesis, [7,35,36] and cold spray. [37] Among them, spray pyrolysis is a versatile technique to produce nanostructured metallic and alloy particles in one step.…”