Explosion characteristics of syngas from gasification process

Abstract

This paper describes a series of experiments performed to study the explosion parameters of syngas and its flammable component air mixtures. More than 100 pressure-time curves were recorded allowing to investigate the effects of three different gasification process conditions on the maximum explosion pressure and deflagration index. The representative syngas samples were prepared by thermochemical wood-pellets gasification. The experiments were performed in 20-L oil-heated spherical experimental arrangement for different concentrations at representative explosion initial temperature of 65 degrees C. The experimental results were further compared with the explosion parameters of pure gases, namely hydrogen, methane, carbon monoxide and propane as the main flammable syngas components. The most important results are the maximum values of explosion pressure 7.2 +/- 0.2 bar and deflagration index 170 +/- 14 bar.m/s derived for start-up process conditions. These knowledge could be used to understand the effects of operating conditions to both the optimization design on syngas-fueled applications and the safety protection strategies.