Simulation of the effects of hydrogen on the combustion of synthesis gas composed of carbon monoxide, hydrogen, and nitrogen in a round jet burner

Abstract

Synthesis gas used in the production of synthetic natural gas is a gaseous mixture consisting of carbon monoxide, hydrogen, and nitrogen gas. A combustion flame is produced by mixing synthesis gas with a high-velocity air jet. In this study, the flame of synthesis gas and air combustion in a round jet burner was investigated numerically. The temperature, velocity, and pressure changes in the flame in the burner and the CO2, H2O, O2 mass fraction changes for six different mixture ratios were investigated numerically. The accuracy of the numerical method used in the study was supported by data from the literature. Depending on the production area, evaluations can be made in terms of emission rate, temperature, pressure change, and energy consumption values, and the most suitable working conditions for product quality can be determined. It has been established that a 40% increase in the hydrogen content of the mixture results in a flame temperature of approximately 1910 degrees C, with a corresponding temperature rise of 11%. This enhancement in hydrogen concentration contributes to an accelerated combustion rate and a higher peak temperature. The proportion of hydrogen in syngas is a significant factor affecting the combustion rate.