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CPOTE2020 logo
6th International Conference on
Contemporary Problems of Thermal Engineering
Online | 21-24 September 2020

Abstract CPOTE2020-1276-A

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The sythesis of palladium/nickel nanocatalyst supported by ultrasounds for low-temperature carbon dioxide methanation

Błażej TOMICZEK, Silesian University of Technology, Poland
Marek SZINDLER, Silesian University of Technology, Poland
Dariusz ŁUKOWIEC, Silesian University of Technology, Poland
Mirosława PAWLYTA, Silesian University of Technology, Poland
Tomasz TAŃSKI, Silesian University of Technology, Poland

Methanization of carbon dioxide is a well-known reaction and used not only in the chemical industry, but also in the storage of energy obtained from renewable energy sources. The CO and CO2 methanation processes discovered in 1902 by Paul Sabatier and Jean-Baptiste Senderens are a promising solution in reducing emissions of environmentally harmful gases. The exothermic nature of the methanation reaction causes problems in terms of accurate control of the reaction temperature. An important aspect is also a relationship between the catalyst particle size and its catalytic activity. In most cases, the activity increases inversely in proportion to the size of the particles. Some materials exhibit catalytic passivity in the form of microstructures, while the transition to nanometric sizes increases the catalytic capacity. In this context, research has been presented. In this context, research on the synthesis of Pd/Ni nanocatalyst was presented. Palladium nanoparticles with high stability and high chemical purity, as well as the desired sizes were deposited directly on the nickel substrate by chemical and physicochemical methods. Synthesis using a chemical reduction method was carried out without a reducing agent or with an ascorbic acid reducing agent. In the case of the physicochemical method, ultrasounds and temperature were used. Alternatively, all three reducers were used. The synthesized nanoparticles were deposited directly on a nickel substrate in the form of a molecular mesh. The prepared nanocatalyst has been subjected to structural analysis using a transmission electron microscope (TEM). Scanning Electron Microscopic (SEM) images were taken with a Zeiss Supra 35. Qualitative studies of chemical composition were also performed using the Energy Dispersive Spectrometer (EDS). The structure of nickel oxide was investigated by X-ray crystallography. A nanocatalyst was obtained with a high coverage of the nickel molecular mesh surface with palladium nanoparticles not exceeding 10 nm in diameter.

Keywords: Methanation, Nanotechnology, Nanoparticles, Nanocatalyst, Renewable energy
Acknowledgment: This work is supported by the National Science Centre (Poland) under grant no. UMO-2018/29/B/ST8/02303