To solve the problem of associated petroleum gas (APG) utilization, a method of APG pyrolysis is proposed to produce hydrogen and carbon black. An experimental pyrolysis plant with a production rate of up to 1 nm3/h has been created. The main element of the plant is a tubular furnace with a corundum tube with a diameter of 50 mm, the length of the hot zone of the furnace is 450 mm. Studies of the pyrolysis process were carried out on a synthetic gas mixture, the composition of which is equivalent to the composition of APG from one of LUKOIL’s production facility, with the following molar fractions of components according to the passport: CH4 – 76,89 %, C2H6 – 12,20 %, C3H8 – 4,75 %, C4H10 – 0,75 %, CO2 – 3,22 %, N2 – 2,19 %. As a result of a series of experiments, quantitative values of hydrogen yield and the degree of APG decomposition in a pyrolysis reactor within a tubular furnace were determined at temperatures ranging from 1000 to 1400 °C and various flow rates from 0,009 to 0,9 m3/h. The maximum hydrogen content in the product was 78,18 % at 1400 °C and a flow rate of 0,3 m3/h. It has been shown that an increase in consumption and a decrease in the residence time of raw materials in the hot zone lead to a decrease in the hydrogen content in the pyrolysis products. The data obtained made it possible to calculate the material balance of the pyrolysis process for a pilot installation with a capacity of 100 nm3/h.
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