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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0170202 (1980-07-18) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 283 인용 특허 : 2 |
A process for recovering hydrocarbon products from a body of fragmented or rubblized oil shale. The process includes initiating a combustion zone adjacent the lower end of a body of oil shale and using the thermal energy therefrom for volatilizing the shale oil from the oil shale above the combustio
A process for recovering hydrocarbon products from a body of fragmented or rubblized oil shale. The process includes initiating a combustion zone adjacent the lower end of a body of oil shale and using the thermal energy therefrom for volatilizing the shale oil from the oil shale above the combustion front. Improved recovery of hydrocarbon products is realized by refluxing the heavier fractions in the volatilized shale oil. The heavier fractions are refluxed by condensing the heavier fractions and allowing the resulting condensate to flow downwardly toward the combustion front. Thermal energy from the combustion zone cracks the condensate producing additional lower molecular weight fractions and a carbonaceous residue. The carbonaceous residue is burned in the combustion front to supply the thermal energy. The temperature of the combustion front is maintained by regulating input of oxygen to the combustion zone. The process also includes sweeping the volatilized products from the rubblized oil shale with a noncombustible gas. The flow rate of sweep gas is also controlled to regulate the temperature of the combustion front. The recovered products can be enriched with hydrogen by using water vapor as part of the noncombustible sweep gas and cracking the water vapor with the hot carbon in the combustion front to produce hydrogen and an oxide of carbon.
A process for recovering hydrocarbonaceous products from a body of fragmented oil shale in situ, comprising: volatilizing hydrocarbonaceous products from the body of fragmented oil shale by forming in situ a combustion front in the oil shale adjacent the lower end of the body of fragmented oil shale
A process for recovering hydrocarbonaceous products from a body of fragmented oil shale in situ, comprising: volatilizing hydrocarbonaceous products from the body of fragmented oil shale by forming in situ a combustion front in the oil shale adjacent the lower end of the body of fragmented oil shale, the thermal energy from said combustion front producing a body of hot shale, a first lower molecular weight fraction and a higher molecular weight fraction; refluxing the higher molecular weight fraction by condensing said higher molecular weight fraction on oil shale above said combustion front forming a condensate and flowing said condensate downwardly into contact with said body of hot shale; producing a carbonaceous residue on said body of hot shale by cracking said condensate on said body of hot shale while producing a second lower molecular weight fraction and said carbonaceous residue, the second lower molecular weight fraction volatilizing and passing upwardly through said body of fragmented oil shale; burning said carbonaceous residue, thereby continuously forming said combustion front and advancing said combustion front upwardly through said body of fragmented oil shale; and sweeping said first and second lower molecular weight fractions from said body of fragmented oil shale by passing a noncombustible gas upwardly through said body of fragmented oil shale so as to sweep away said first and second lower molecular weight fractions while allowing condensation and downward flow of said higher molecular weight fraction in said refluxing step.
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