| 摘要 |
A process for producing a high methane content, synthetic pipeline gas from oil shale. Oil shale is processed so as to provide a shale oil fraction, and solids including shale fines and spent shale. The shale oil and a hydrogen rich gas are introduced into a hydrogasifier chamber which is maintained at a temperature of about 1,100 DEG -1,600 DEG F., and at a pressure of about 500-2,000 psig, so as to convert the shale oil by hydrogasification into a high methane content, synthetic pipeline gas, normally liquid aromatic hydrocarbons, and a carbonaceous solid residue. Pulverized solids are passed through the hydrogasifier and into a gasifier chamber, maintained at a pressure of about 500-2,000 psig. and at a temperature of about 1,500 DEG -2,100 DEG F., to remove the carbonaceous residue or coke formed in the hydrogasifier. Shale fines and spent shale are also introduced into the gasifier wherein a gaseous mixture is formed by reaction with steam and oxygen or with steam and air. The gaseous mixture is then converted to a hydrogen rich gas either directly, by a carbon monoxide shift reaction (when steam and oxygen are used in the gasifier) or indirectly, by the steam-iron process (when steam and air are used in the gasifier). In the steam-iron process, the gaseous mixture is the reducing agent for iron oxides formed when added steam is converted to hydrogen over the reduced iron oxides.
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