Prevention of formation of nickel subsulfide in partial oxidatio

Details Prevention of formation of nickel subsulfide in partial oxidatio Prevention of formation of nickel subsulfide in partial oxidatio

1988-09-12

1989-07-25

Mars, Howard T.

Compositions

Gaseous compositions

Carbon-oxide and hydrogen containing

48197R, C01B 322, C01B 324

Patent

active

048511528

ABSTRACT:
A sulfur-containing heavy liquid hydrocarbonaceous fuel and/or solid carbonaceous fuel with nickel, vanadium, and silicon containing ashes is mixed with a copper and/or cobalt-containing material to provide a weight ratio of copper and/or cobalt to nickel in the range of about 0.2 to 10; and the weight ratio of copper and/or cobalt to silicon in said mixture is in the range of about 0.0001 to 0.04. The mixture is reacted by partial oxidation in a down-flowing free-flow unobstructed vertical reaction zone with refractory lined walls at a temperature in the range of about 1800.degree. F. to 2900.degree. F., an equilibrium oxygen concentration in the gas phase in the reaction zone with a partial pressure in the range of about 1.7.times.10.sup.-15 to 2.3.times.10.sup.-8 atmospheres; and an equilibrium sulfur concentration in the gas phase in the reaction zone with a partial pressure in the range of about 2.53.times.10.sup.-7 to 8.1.times.10.sup.-2 atmospheres. A raw effluent gas stream is produced comprising H.sub.2 +CO and containing entrained slag comprising the following phases: (i) Cu-Ni or Co-Ni alloy, (ii) copper silicate and/or cobalt silicate, (iii) a spinel phase, and (iv) about 0 to 5 wt. % of a fluid oxysulfide phase. Substantially no toxic Ni.sub.3 S.sub.2 is produced in the slag.

REFERENCES:
patent: 4654164 (1987-03-01), Najjar
patent: 4732700 (1988-03-01), Najjar et al.
patent: 4774021 (1988-09-01), Najjar et al.

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