The influence of elevated pressure on the kinetics of evolution of selected gaseous products during coal pyrolysis

The paper discusses the influence of the pressure of pyrolysis on the formation kinetics of C1–C3 hydrocarbons, hydrogen, CO and CO2 during pyrolysis of three selected coals of different rank. The examinations were carried out within the pressure range of 0.1–10 MPa under the conditions of constant residence time of primary products in the reaction zone. It was found that the pressure of pyrolysis exerts a significant influence on the formation rate of CH4, H2, CO and CO2. Also, the formal kinetic parameters of formation reactions of major gaseous products during pressure pyrolysis of the examined coals were calculated.