The effect of temperature on the decomposition process of propane-butane mixture at high temperatures

Department of Polymer Chemistry and Chemical Technology, Samarkand State University, , 140101, Samarkand, Republic of Uzbekistan

^* Corresponding author: fer.sapedu@gmail.com

Abstract

In the work, the composition of the starting materials and reaction products was checked by the chromatographic method. The purpose of the work is to study the effect of temperature on the decomposition process of the propane-butane mixture at high temperatures. Qualitative analysis was carried out by the method of "witnesses", and quantitative analysis was carried out by the method of internal normalization. Spatial composition analysis was performed on a DRON- 4.0 (CuKa - radiation) diffractometer, particle size scanning electron microscopy ((JSM-6380 LV) Scanning Electron (Micscope) and emission electron microscopy (EMV-100BR)). The relative surface area was determined by the BET method. The total pore volume was calculated from the amount of nitrogen adsorbed at peak saturation. Pore size distribution was determined by the BJH (Barrett-Joyner-Halendr) method. The effect of temperature and exposure time on the decomposition of the propane-butane mixture at high temperatures was carried out under the following optimal conditions: the study of the effect of temperature on the yield of products was carried out with an exposure time of 0.12 seconds and a water vapour: reagent ratio of 0.4:1 and a temperature range of 700- 900 ℃. The influence of various technological parameters on the process of decomposition of the propane-butane mixture under the influence of temperature in an airless place at high temperature was studied. The increase in temperature and the decrease in the time of the initial substance (reagent) in the reaction zone allows for increasing the output of ethylene from the propane-butane mixture, in which the optimum temperature for the production of lower molecular unsaturated hydrocarbons, i.e. ethylene, propylene and butylene, is 850 ℃. The catalyst created for the decomposition of a propane-butane mixture containing 5%CrF3*CoF2*5%NiF2*2%ZrO2*8%Na2SO4 at high temperatures has been shown to exhibit high activity and selectivity in the catalytic decomposition of propane-butane mixtures.