Abstract
Technical characteristics and activity of oxide catalyst, applied on fibers ALSIFLEX-KT1600, were studied. As a catalytic contact, we used spinel (% by weight): Al 2 O 3 – 10; MgO – 3; (Cr 2 O 3 +NiO) – 0.4. As a result of conducted studies, the structure of the carrier and the catalyst were studied, anisotropy of properties was established, and technical characteristics were deftermined: density of the catalyst, which made up 0.3 g/m 3 , 90.4 % porosity, hydrodynamic resistance of the catalyst’s layer at different voluminous loads, and specific surface area. Catalyst activity was studied at complete methane oxidation. Activation energy Ea made up 86.241 kJ/mol, while temperature of complete methane conversion amounted to 800 °C and that of 50 % conversion made up 550 °C. Macrokinetic equation of the rate of complete methane oxidation for this catalyst was obtained. Research results proved high activity of the catalyst, resistant to exposure to high temperatures (1000–1200 °C) and volumetric loading (t=0.03–0.05 s). The obtained results indicate relevance of the use of the developed catalyst for catalytically stabilized combustion of hydrocarbon fuels with improved performance, technological and environmental characteristics.
Highlights
The 21st century is characterized by diametrically opposed attitude of scientists and manufacturers to the use of natural resources in comparison with the early 20th century
This research indicated a positive impact of presence of oxygen in the structure of a catalyst on quality and rate of methane oxidation, and the fact that existence of strontium in a catalytic composition leads to a decrease in its activity
The goal of present research is to study technical characteristics of the synthesized catalyst based on oxides of Cr, Ni, Mg and Al, applied on aluminosilicate fibre material, and the kinetics of methane oxidation by air oxygen on it
Summary
The 21st century is characterized by diametrically opposed attitude of scientists and manufacturers to the use of natural resources in comparison with the early 20th century. A constant decrease in the raw materials reserves and strict environmental regulations, adopted at the Paris Climate Conference, stimulate development and implementation of the latest environmentally friendly technologies of obtaining synthetic compounds and energy. One example of such technologies is the technology of catalytic (catalytically stabilized) oxidation of various types of hydrocarbon fuels [1, 2]. – high efficiency; – low temperature of fuel combustion in a chamber (t=660–1000 °C); – high performance of a catalytically stabilized burner; – stable operation of catalyst on depleted mixtures [2]; – low temperature of exhaust gases (t=55 °C). Development of new catalytic systems and catalytic burner devices is a relevant task
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