SYSTEMS, METHODS, AND COMPOSITIONS FOR PRODUCTION OF SYNTHETIC HYDROCARBON COMPOUNDS
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Abstract
A process and system for producing hydrocarbon compounds or fuels that recycle products of hydrocarbon compound combustion—carbon dioxide or carbon monoxide, or both, and water. The energy for recycling is electricity derived from preferably not fossil based fuels, like from nuclear fuels or from renewable energy. The process comprises electrolysing water, and then using hydrogen to reduce externally supplied carbon dioxide to carbon monoxide, then using so produced carbon monoxide together with any externally supplied carbon monoxide and hydrogen in Fischer-Tropsch reactors, with upstream upgrading to desired specification fuels—for example, gasoline, jet fuel, kerosene, diesel fuel, and others. Energy released in some of these processes is used by other processes. Using adiabatic temperature changes and isothermal pressure changes for gas processing and separation, large amounts of required energy are internally recycled using electric and heat distribution lines. Phase conversion of working fluid is used in heat distribution lines for increased energy efficiency. The resulting use of electric energy is less than 1.4 times the amount of the high heating value of combustion of so produced hydrocarbon compounds when carbon dioxide is converted to carbon monoxide in the invention, and less than 0.84 when carbon monoxide is the source.
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Citations
98 Claims
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1-80. -80. (canceled)
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81. A system for producing hydrocarbon compounds comprising at least the following units:
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a) a reverse water gas shift reactor assembly supplied with hydrogen gas and carbon dioxide gas to generate a syngas, that is a mixture of at least carbon monoxide gas and hydrogen gas, water steam, and residual carbon dioxide gas; b) a unit for generating a mixture of at least hydrocarbon compounds from at least carbon monoxide gas and hydrogen gas; characterized in that the reverse water gas shift reactor assembly comprises; a) a first reverse water gas shift reactor supplied with hydrogen gas and carbon dioxide gas, wherein the molar ratio of hydrogen to carbon dioxide is more than one, to generate a first syngas stream comprising a mixture of at least carbon monoxide gas and hydrogen gas, water steam, and residual carbon dioxide gas; b) a unit for condensing at least some water steam from the first syngas stream to generate a second syngas stream; c) a second reverse water gas shift reactor supplied with the second syngas stream to generate a third syngas stream; d) a unit for condensing at least some water steam from the third syngas stream to generate a fourth syngas stream, which is supplied to the unit for generating a mixture of at least hydrocarbon compounds. - View Dependent Claims (82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98)
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Specification