3279. ----------------.  [STIEF, F.]  [Gasification of Fuels in Gas Works With Special Consideration of the Continuous Production of Water Gas.]  Gas- u. Wasserfach, vol. 85, 1942, pp. 367-374; Chem. abs., vol. 37, 1943, p. 4551.

    Review of gas production from coke (generator gas with a heat of combustion of 1,200 kcal. per m.³ (under standard conditions) and a heating value of 1,150 kcal. per m.³, water gas of a heating value of 2,700 kcal. per m.³), coal (generator and water gas, heating value 3,000 kcal. per m.³) and by the continuous Pintsch-Hillebrand water-gas process.  A flow sheet of the latter process, together with drawings of generators of various designs for this and the older process, is given.  A plant operating by the continuous process was in operation for 300 days per yr. for 6 yr.  Brown coal of reasonable low ash content and fairly high melting point of the ash is a suitable raw material for the process, but the use of bituminous coal is limited to a few special grades.  The temperature of the gas-steam mixture in the gas collection cupola is about 1,300°; the temperature in the regenerator chambers, which are used alternately in a 16-min. cycle, is 1,500°-1,600°.  The heating value of the water gas remains virtually constant and changes only by about 40 kcal. per m.³ during the periodic change from one regenerator to the other.  The heat of the combustion of the gas can be kept easily at 2,750-2,800 kcal. per m.³   The ratio CO:H₂ can be brought to 1:2 by increasing the amount of steam added so that the gas becomes suited for use in synthetic processes.  The economy of the process is determined by the quality of the refractories used in the generator because they must be able to withstand the continuously high working temperature.  15 refs.