Producing pure gas of high calorific value from gasification of

Details Producing pure gas of high calorific value from gasification of Producing pure gas of high calorific value from gasification of

1978-07-10

1980-07-08

Bashore, S. Leon

Gas: heating and illuminating

Processes

Fuel mixtures

48206, 55 85, 60 3902, C10J 316

Patent

active

042115396

ABSTRACT:
A process of producing a gas of high calorific value and low dust content comprising contacting coal with water vapor and free oxygen at a pressure of about 5 to 150 bars and a temperature sufficient to produce a gas containing hydrogen and carbon monoxide, containing at least about 10 grams of dust per standard cubic meter and having a temperature of about 350.degree. to 800.degree. C., subjecting the gas to a coarse purification to reduce the solids content thereof, then scrubbing the gas at about 200.degree. to 300.degree. C. with a liquid predominantly comprising hydrocarbons and including less than about 5% of water by weight, and withdrawing a purified gas substantially free of solids and having an enhanced calorific value. In accordance with preferred features, the coarse purification stage includes at least one cyclone separator, the gas leaves the coarse purification stage at a temperature above about 350.degree. C. and is cooled by spraying with water to below 350.degree. C. before entering the intense scrubbing stage.

REFERENCES:
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patent: 2701758 (1955-02-01), Danulat et al.
patent: 3069250 (1962-12-01), Weittenhiller et al.
patent: 3540867 (1970-11-01), Baron et al.
patent: 3607157 (1971-09-01), Schlinger et al.
patent: 3746522 (1973-07-01), Donath
patent: 4007019 (1977-02-01), Slater et al.
patent: 4087258 (1978-05-01), Baron et al.
Clean Fuels from Coal Symposium Papers, 9-1973, Krieb, pp. 127 and 131, Igt.

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