Abstract: The invention relates to a process for recovering the sulfur components of acidic gases collected by gas desulfurization. The inventive concept is to first compress a stream of the acidic gas (known as "acid gas") up to a pressure of 8.00 to 12.00 atmospheres absolute. Then this compressed stream of gas is cooled to -35.degree. to -45.degree. C. The pressure on this cooled gas is reduced to a pressure of 1.05 to 2.00 atmospheres absolute. Subsequently, the gas is further cooled to a temperature of -55.degree. to -65.degree. C. Finally, the resulting mixture is conducted to a separator where frozen solid constituents are separated from the gaseous constituents. The gaseous constituents include substantially all of the sulfides produced during the gas desulfurization and the frozen solid particles consist essentially of carbon dioxide.

Abstract: Fine-grained solids including dust-like solids are introduced into a reaction space which is under pressure such as used in the gasifying of coal is effected by mixing carbon dioxide in the form of dry ice with the solids after the solids have been precooled to a temperature of -80.degree. C., then bringing the formed mixture of solids and dry ice up to the pressure required for introduction into the reaction space, thereafter subjecting the dry ice to sublimation to separate it from the solids and subsequently, after pressure release and cooling to the desublimation comparative, reconverting the gaseous carbon dioxide into dry ice which then is circulated into the next run while the solids are passed into the reaction space.

Abstract: A carbon monoxide-rich gas of a carbon monoxide concentration of at least 98% by volume is produced by[a] generating a hydrogen and carbon monoxide-containing crude gas by gasification of a finely divided solid fuel, including dust-like fuel, with oxygen or oxygen-enriched air and steam;[b] desulfurizing the crude gas;[c] removing any carbon dioxide present in the crude gas by a selective wash;[d] subjecting the thus-treated crude gas to a low temperature decomposition into a carbon monoxide fraction, a hydrogen fraction and a fraction constituted by the residual gases;[e] carrying out an endothermal catalytic conversion of the hydrogen fraction by reaction with the carbon dioxide removed in step [c] from the crude gas, the carbon monoxide-rich gas occurring in said conversion reaction, after elimination of the condensate, being recycled into the crude gas at a place preceding said carbon dioxide removal (step [c]), while[f] recovering the formed carbon monoxide-rich gas fraction for further use and dischargi

Abstract: Dried, finely divided coal is admitted into a gasifying chamber wherein it undergoes partial oxidation in the presence of air and water vapor so as to form a combustible gas. The combustible gas is cooled by heat-exchange with water thereby causing low-pressure and high-pressure steam to be generated. After being washed, compressed and desulfurized, the cooled combustible gas is admitted into a combustion chamber. Here, it is combusted in the presence of preheated air so as to form a combustion gas. The hot combustion gas preheats the air and water vapor used for the partial oxidation, superheats the high-pressure steam previously produced and generates additional high-pressure steam. As a result, the combustion gas is cooled. The cooled combustion gas is expanded in a gas turbine which drives an electrical generator.

Abstract: A process for the production of a gas having a methane content between 40 and 99% by volume from a gas mixture which contains hydrogen, carbon dioxide, and at least 20% by weight of carbon monoxide which comprises the following steps:A. humidifying the gas mixture by mixing water vapor therewith,B. subjecting the humidified gas mixture to a partial catalytic conversion so as to reduce its content of carbon monoxide to between 10 and 20% by volume,C. desulfurizing the partially converted gas mixture,D. subjecting the desulfurized gas mixture to a first catalytic methanation step,E. cooling and dehumidifying the resulting gas mixture,F. reheating the said cooled and dehumidified gas mixture and subjecting it to a second catalytic methanation step, andG.

Abstract: The gaseous mixture obtained from the partial oxidation of coal and/or heavy oil is desulfurized. Thereafter, the gaseous mixture is admitted into a reactor wherein it simultaneously undergoes a conversion reaction and a methanization reaction. The reactions take place at a temperature between 280.degree. and 500.degree.C and at a pressure between 3 and 60 atmospheres in excess of atmospheric pressure. The reactions proceed catalytically in the presence of conventional catalysts. After having been subjected to the reactions, the gaseous mixture is conveyed to a scrubber for the removal of carbon dioxide. A gas containing at least 80 percent by volume of methane is obtained.