Shift conversion of raw gas from gasification of coal

Details Shift conversion of raw gas from gasification of coal Shift conversion of raw gas from gasification of coal

1978-03-01

1979-07-17

Bashore, S. Leon

Gas: heating and illuminating

Processes

Fuel mixtures

48202, 48206, 252373, 423655, C10J 300

Patent

active

041613937

ABSTRACT:
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.degree.-200.degree. 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.degree. to 400.degree. C. in an amount of about 10-100 g per standard m.sup.3 of dry gas and has a CO:H.sub.2 O volume ratio of about 0.8-2, 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.degree.-450.degree. 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.degree.-500.degree. C., while maintaining a pressure of about 15-100 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.

REFERENCES:
patent: 3010813 (1961-11-01), Clarke et al.
patent: 3061421 (1962-10-01), Landau et al.
patent: 3540867 (1970-11-01), Baron et al.
patent: 4031030 (1977-06-01), Rudolph
patent: 4061475 (1977-12-01), Moller et al.
patent: 4065273 (1977-12-01), Rudolph
patent: 4082520 (1978-04-01), Baron et al.

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