Methanation process utilizing split cold gas recycle

Gas: heating and illuminating – Processes – Fuel mixtures

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260449M, C10K 304

Patent

active

039679365

ABSTRACT:
In the methanation of feed gas comprising carbon monoxide and hydrogen in multiple stages, the feed gas, cold recycle gas and hot product gas is mixed in such proportions that the mixture is at a temperature sufficiently high to avoid carbonyl formation and to initiate the reaction and, so that upon complete reaction of the carbon monoxide and hydrogen, an excessive adiabatic temperature will not be reached. Catalyst damage by high or low temperatures is thereby avoided with a process that utilizes extraordinarily low recycle ratios and a minimum of investment in operating costs.

REFERENCES:
patent: 3128163 (1964-04-01), Weittenhiller et al.
patent: 3511624 (1970-05-01), Humphries
patent: 3854895 (1974-12-01), Muller
patent: 3870738 (1975-03-01), Yamamoto et al.
"Methanation of Coal Gas for SNG" Moeller et al. Hydrocarbon Processing Apr. 1974, pp. 69-74.
"Clean Fuels from Coal" Institute of Gas Technology Symposium Papers presented Sept., 1973, pp. 91-95, 109.
"Development of Catalysts and Reaction Systems for Methanation" Field et al. I and EC Research and Development June, 1964 pp. 150-153.

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