GASIFICATION OF GASEOUS, LIQUID, AND SOLID WASTES WITH DETONATION-BORN ULTRASUPERHEATED STEAM

Abstract

The pulsed detonation gun technology for gasi¦cation of organic waste with ultrasuperheated steam [1, 2] has been demonstrated experimentally for the ¦rst time. The organic waste converter consisted of a pulsed detonation gun and water-cooled spherical §ow reactor (Fig. 1). Experiments on methane conversion as well as on the gasification of liquid (waste machine oil) and solid (sawdust) waste by the high-temperature gaseous detonation products of methane oxygen mixture were performed. The pulsed detonation gun was operated at a relatively low frequency of f = 1 Hz which provided a timeaveraged mean temperature of detonation products in a spherical §ow reactor at a level of 1200 K at a time-averaged absolute pressure in the reactor slightly higher than P = 1 atm. The novel technology was shown to provide complete (100%) conversion of methane into syngas containing H2 and CO with a ratio of H2/CO ≈ 1.25 2. Gasi¦cation of liquid and solid wastes led to the production of syngas containing reactive components H2, CO, and CH4 in the total amounts of 80 and 65 %(vol.) dry basis (d. b.), respectively. The corresponding H2/CO ratios in the product syngas were 0.8 and 0.5. Overall, experiments on methane conversion as well as liquid and solid waste gasi¦cation showed that under the same conditions at f = 1 Hz and P = 1 atm, the composition of syngas in terms of H2 and CO almost did not depend on the type of feedstock (Fig. 2).