Abstract: A closed loop energy conversion system for converting a non-fossil fuel energy source to a fossil fuel without generating air polluting emissions when the fossil fuel is combusted to provide energy to an external source. The closed loop energy conversion apparatus employed in this process includes a dissociation unit for dissociating water into hydrogen gas and oxygen gas and separating hydrogen gas from oxygen gas. An energy source provides energy to the dissociation unit. Oxygen gas and hydrocarbon gas react in a hydrocarbon combustion unit to form a combustion product comprising carbon dioxide gas and water vapor. A first heat exchanger cools the combustion product and condenses water vapor from the combustion product. A carbon dioxide separator separates carbon dioxide gas from water condensed in the first heat exchanger. Carbon dioxide gas reacts with hydrogen gas in a hydrocarbon synthesis reactor to form a mixture comprising hydrocarbon gas and water vapor.

Abstract: A closed loop energy conversion apparatus including a dissociation unit for dissociating water into hydrogen gas and oxygen gas and separating hydrogen gas from oxygen gas. An energy source provides energy to the dissociation unit. Oxygen gas and hydrocarbon gas react in a hydrocarbon combustion unit to form a combustion product comprising carbon dioxide gas and water vapor. A first heat exchanger cools the combustion product and condenses water vapor from the combustion product. A carbon dioxide separator separates carbon dioxide gas from water condensed in the first heat exchanger. Carbon dioxide gas reacts with hydrogen gas in a hydrocarbon synthesis reactor to form a mixture comprising hydrocarbon gas and water vapor. A second heat exchanger cools the mixture and condenses water vapor from the mixture. A hydrocarbon separator separates hydrocarbon gas from water condensed in the second heat exchanger.