Solution combustion synthesis of Ni/Al2O3 catalyst for decomposition of associated petroleum gas using glycine as fuel

UDK: 544.4:622.276

DOI: 10.24887/0028-2448-2025-9-112-117

Key words: catalyst, associated petroleum gas, methane decomposition, solution combustion synthesis

Authors: P.B. Kurmashov (Novosibirsk State Technical University, RF, Novosibirsk); А.О. Dudoladov (Joint Institute for High Temperatures of the RAS, RF, Moscow); M.S. Vlaskin (Joint Institute for High Temperatures of the RAS, RF, Moscow); A.A. Shishin (Novosibirsk State Technical University, RF, Novosibirsk); M.A. Danilenko (Novosibirsk State Technical University, RF, Novosibirsk); S.A. Shpakova (Novosibirsk State Technical University, RF, Novosibirsk); A.G. Bannov (Novosibirsk State Technical University, RF, Novosibirsk); D.А. Volkov (LUKOIL-Engineering LLC, RF, Moscow); Т.V. Rositskaia (LUKOIL-Engineering LLC, RF, Moscow); A.N. Korol (LUKOIL-Engineering LLC, RF, Moscow); R.G. Nurgaliev (RITEK LLC, RF, Volgograd); O.V. Slavkina (RITEK LLC, RF, Volgograd)

In this work, the technology of pyrolysis of associated petroleum gas over 90% Ni / 10% Al2O3 catalyst, synthesized by the solution combustion method is investigated. The high-percentage catalyst was synthesized by burning a solution as a result of the combined heat treatment of (NO3)2-Al(NO3)3-C2H5NO components in a muffle furnace at 450 °C at a rate of 1 °C/min. The resulting catalyst was a powder with a specific surface area of 68-87 m2. The paper evaluates the catalytic activity of the catalyst in the decomposition reaction of methane and associated petroleum gas at a pressure of 0,1 MPa and temperatures of 550-650°C. The catalysts were tested in a horizontal reactor without preliminary hydrogen reduction. The synthesized catalyst samples, as well as the carbon nanomaterial obtained on it, were studied using scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, low-temperature nitrogen adsorption and X-ray diffraction. The relationship between the average diameter of the nanofiber and the temperature of the catalytic reaction was experimentally established. The highest specific yield of hydrogen and carbon nanofibers was 11,8 mol/Gkat and 71,0 g/Gkat, respectively, at a temperature of 550 °C in the decomposition reaction of associated petroleum gas. The dependence of carbon yield (71,0 g/Gkat > 49,1 g/ Gkat > 31,5 g/ Gkat) and hydrogen (11,8 mol/Gkat > 8,2 mol/Gkat > 5,3 mol/Gkat) from the temperature of the catalytic reaction, which varies in the range 550 °C > 600 °C > 650 °C.

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