The factors influencing hydrogenation of a primary coal tar

Abstract

Due to steady increase in prices for oil, the receiving of fuel and chemical products from coal and heavy oil gets the practical value that can be considered as one of the perspective directions in energetics and the petrochemical industry of the near future. Receiving liquid fuels from firm combustible minerals is reduced to destruction of molecules of initial raw materials, increase in the relative content of hydrogen, removal of oxygen, nitrogen, sulfur and cindery mineral substances. The method of planning the experiment with use of the composite plan of Boxing Wilson optimum conditions of carrying out process were determined, a hydrogenation of fraction of primary coal tar to 175 °C. It was established the influence of various factors, such as the process course temperature, reaction time, pressure of hydrogen and number of the added catalyst. The regression equation is calculated, the importance of the equation is estimated by parametrical criteria of statistics (Student and Fischer's criterion). It is defined that degree of a hydrogenation of fraction of primary coal tar from the end of boiling at 175 °C rises with increase in temperature, duration and the maintenance of the added catalyst. It is established that the most optimum temperature of hydrogenation processes 420 °C, the in¬itial pressure of hydrogen is 3,0 MPa and duration of carrying out process is 60 min.