Compositions – Gaseous compositions – Carbon-oxide and hydrogen containing
Patent
1987-05-19
1989-05-02
Gray, Bruce D.
Compositions
Gaseous compositions
Carbon-oxide and hydrogen containing
48197R, C07C 336
Patent
active
048266272
ABSTRACT:
Synthesis gas is produced by the partial oxidation of a feedstock comprising petroleum coke and/or heavy liquid hydrocarbonaceous fuel containing sulfur and having an ash that contains nickel, vanadium and silicon. An iron-containing additive is introduced into the reaction zone along with the feed. A first portion of the additive combines with at least a portion of the nickel, iron and sulfur constituents found in the feedstock to produce a first liquid phase washing agent. A second portion of the additive combines with at least a portion of the silicon, aluminum, calcium, sodium, and/or potassium and iron constituents found in the feedstock to produce a second liquid phase washing agent. The first and second liquid phase washing agents collect and transport at least a portion of the vanadium-containing oxide laths and spinels and other ash components out of the reaction zone. Silicon-containing addition agents, including coal, will increase the ratio of second liquid phase washing agent to first liquid phase washing agent thereby more effectively washing the vanadium-bearing spinels from the gasifier. In one embodiment, the iron-containing additive is uniformly dispersed in petroleum coke having a nickel and vanadium-containing ash. Elemental iron may be prevented from forming in the reaction zone by introducing sufficient supplemental oxygen-containing material and/or sulfur-containing material into the reaction zone so as to keep the partial pressure of oxygen and/or S.sub.2 gas in the reaction zone slightly above that calculated from Formulae I and/or II described herein. By this method molten slag having a reduced viscosity and containing the nickel and vanadium-containing impurities from the feedstock are readily removed from the gas generator at a lower temperature. Further, the life of the refractory lining is extended.
REFERENCES:
patent: 4668428 (1987-05-01), Najjar
patent: 4668429 (1987-05-01), Najjar
Brent Albert
Gray Bruce D.
Kulason Robert A.
O'Loughlin James J.
Texaco Inc.
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