Shift conversion of raw gas from gasification of coal

Patent · Tue Jul 17 04:00:00 EDT 1979

OSTI ID:5651356

Rudolph, P; Marwig, U D

In a process for producing a fuel gas from a solid fuel by a gasification of solid fuel under a pressure of about 15-100 bars by a treatment with steam and a gas which contains free oxygen, cooling the raw gas to a temperature of about 150 to 200/sup 0/C and saturating it with water vapor, removing condensate which has formed so that the raw gas contains hydrocarbons having a boiling range from about 20 to 400/sup 0/C in an amount of about 10 to 100 g per standard m/sup 3/ of dry gas and has a CO:H/sub 2/O volume ratio of about 0.8 to 2, and subjecting the raw gas to a shift conversion, the improvement which comprises dividing the raw gas into first and second partial streams in a ratio of about 1:10 to 1:1, feeding the first partial stream with a surplus of water vapor to a first shift conversion stage at an inlet temperature of about 280 to 450/sup 0/C, and passing through a second shift conversion stage a mixture of effluent gas from the first shift conversion stage and at least part of the second partial stream of raw gas at a temperature of about 300 to 500/sup 0/C, while maintaining a pressure of about 15 to 100 bars in the shift conversion stages. Advantageously water vapor is added to the raw gas entering the first shift conversion stage in at least about 70% of the stoichiometric amount required for shift conversion of all the carbon monoxide contained in the entire raw gas.

• Assignee: Metallgesellschaft Aktiengesellschaft
• Patent Number(s): US 4161393
• OSTI ID: 5651356
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
CATALYSTS
CATALYTIC EFFECTS
COAL GASIFICATION
COBALT
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HYDROCARBONS
METALS
MOLYBDENUM
NICKEL
NONMETALS
ORGANIC COMPOUNDS
OXYGEN
REFRACTORY METALS
SHIFT PROCESSES
STEAM
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
TUNGSTEN
VAPORS
WATER VAPOR