The process produces a stream of hot clean gas substantially free from particulate matter, alkali metal compounds, hydrogen halides, hydrogen cyanide, sulfur-containing gases, and with or without ammonia for use as synthesis gas, reducing gas, or fuel gas. A pumpable fuel selected from liquid hydrocarbonaceous fuel or liquid emulsions thereof, an aqueous slurry of petroleum coke, and mixtures thereof and containing halides, alkali metal compounds, sulfur, nitrogen and inorganic ash, it reacted by partial oxidation to produce a hot raw gas stream comprising H2, CO, CO2, H2O, CH4, NH3, HCN, HC1, HF, H2S, COS, N2, Ar, particulate matter, vapor phase alkali metal compounds, and molten slag. The hot raw gas stream is cooled and cleaned. Optionally, ammonia is removed by being catalytically disproportionated into N2 and H2. The process gas stream is cooled and halides and HCN in the gas stream are reacted with a supplementary alkali metal compound to remove HC1, HF and HCN. Alkali metal halides and alkali metal cyanide, vaporized alkali metal compounds and residual fine particulate matter are removed by further cooling and filtering. The sulfur-containing gases in the process gas stream are then reacted at high temperature with a mixed metal oxide sulfur sorbent material to produce a sulfided sorbent material which is then separated from the hot clean purified gas stream having a temperature of at least 540oC.
PURPOSE: To obtain a clean gas stream by reacting a hydrocarbonaceous fuel with a gas contg. free oxygen by partial oxidation and removing hydrogen halide, hydrogen cyanide, sulfur-containing gas, fine particulate matter or the like from the produced raw gas stream.
CONSTITUTION: A hydrocarbonaceous fuel feedstock, such as a liquid hydrocarbonaceous fuel (emulsion) and an aqueous slurry of petroleum coke, is reacted with a gas contg. free oxygen in a freely fluidized vertical partial oxidation gasifier with reflactory lining to produce a hot raw gas stream. Next, after cooling to about 540-700°C in a gas cooling zone, splash-accompanying fine particulate matter is separated from the gas stream. Next, an alkali metal compound is fed into the gas stream and is reacted with contained hydrogen halide, hydrogen cyanide or the like and fine particulate matter or the like is filtered after cooling. Subsequently, a sulfur-containing gas in the gas stream is removed by adsorption with a mixed metal oxide adsorbent containing sulfur- reactive oxide to obtain a clean synthesis gas, a reducing gas or a fuel gas without impurities.