Clean synthesis or fuel gas prodn. - with carbon removal by quenching in liq. fuel

摘要

Continuous prodn. comprises reacting a dispersion of particulate carbon in a liq. fuel with an O2-contg. gas (air, O2-enriched air or O2) in an O/C atomic ratio of 0.6-1.5, at 1300-3000 degrees F and 1-250 atm. in a free-flow unpacked gas generator, opt. in the presence of a temp. moderator comprising H2O, CO2, flue gas or cooled recycle gas. The resulting effluent gas is cooled to 300-900 degrees F (above the dew point of H2O in the gas) and particulate carbon is removed by quenching the gas in a hot immersion fluid comprising a dispersion of particulate carbon in liq. fuel. At least part of the hot immersion fluid is cooled to 300-850 degrees F in a waste-heat boiler and at least partly recycled to the quench zone. Part of the hot or cooled immersion fluid is passed to the gas generator. The process avoids problems associated with emulsion formation and H2O removal from the product gas. By-product steam is obtained from the waste-heat boiler.