Syngas and liquid hydrocarbons are produced from synthesis gas. The synthesis gas is produced from a feed mixture of hydrogen and carbon dioxide. The feed mixture is heated to the reverse water gas shift (RWGS) reactor inlet temperature of 1400 to 1800° F. or even more preferred to a RWGS reactor inlet temperature of 1550 to 1650° F. Some of the heat required to heat the feed mixture to the RWGS inlet temperature is supplied by the oxyfuel combustion of hydrogen or fuel with oxygen and minimizes the load onto electrical heaters or need for gas fired geaters. The high inlet temperature allows a high conversion of carbon dioxide to carbon monoxide. Various fuels can be used including hydrogen, hydrocarbons, oxygenates, or carbon monoxide can be used as combustion fuel. The carbon monoxide produced can further be reacted with hydrogen to produce hydrocarbon fuels and chemicals. The hydrocarbon fuels produced include sustainable aviation fuel (SAF) that meets ASTM D7566 specification and diesel fuel that meets ASTM D975 specification. The hydrogen and oxygen are produced from the electrolysis of water. The carbon dioxide can be captured from industrial point sources such as power plants, ethanol plants, steel mills, or other producers of carbon dioxide. Alternatively, the carbon dioxide can be captured from the atmosphere.

Syngas and liquid hydrocarbons are produced from synthesis gas. The synthesis gas is produced from a feed mixture of hydrogen and carbon dioxide. The feed mixture is heated to the reverse water gas shift (RWGS) reactor inlet temperature of 1400 to 1800° F. or even more preferred to a RWGS reactor inlet temperature of 1550 to 1650° F. Some of the heat required to heat the feed mixture to the RWGS inlet temperature is supplied by the oxyfuel combustion of hydrogen or fuel with oxygen and minimizes the load onto electrical heaters or need for gas fired geaters. The high inlet temperature allows a high conversion of carbon dioxide to carbon monoxide. Various fuels can be used including hydrogen, hydrocarbons, oxygenates, or carbon monoxide can be used as combustion fuel. The carbon monoxide produced can further be reacted with hydrogen to produce hydrocarbon fuels and chemicals. The hydrocarbon fuels produced include sustainable aviation fuel (SAF) that meets ASTM D7566 specification and diesel fuel that meets ASTM D975 specification. The hydrogen and oxygen are produced from the electrolysis of water. The carbon dioxide can be captured from industrial point sources such as power plants, ethanol plants, steel mills, or other producers of carbon dioxide. Alternatively, the carbon dioxide can be captured from the atmosphere.

A method, a system, and an apparatus of certain embodiments are provided to recover water and carbon dioxide from combustion emissions. The recovery includes, among other things, electrolysis and carbon dioxide capture in a suitable solvent. The recovered water and carbon dioxide are subject to reaction, such as a catalytic methanation reaction, to generate at least methane.

A process is provided for forming a fuel or a fuel intermediate from two fermentations that includes feeding an aqueous solution comprising a fermentation product from a first bioreactor to a second bioreactor and/or a stage upstream of the second bioreactor, which also produces the fermentation product. The aqueous solution may be added at any stage of the second fermentation and/or processing steps upstream from the second bioreactor that would otherwise require the addition of water. Accordingly, the product yield is increased while fresh/treated water usage is decreased.

A process is provided for forming a fuel or a fuel intermediate from two fermentations that includes feeding an aqueous solution comprising a fermentation product from a first bioreactor to a second bioreactor and/or a stage upstream of the second bioreactor, which also produces the fermentation product. The aqueous solution may be added at any stage of the second fermentation and/or processing steps upstream from the second bioreactor that would otherwise require the addition of water. Accordingly, the product yield is increased while fresh/treated water usage is decreased.

There are provided systems and methods for using fuel-rich partial oxidation to produce an end product from waste gases, such as flare gas. In an embodiment, the system and method use air-breathing piston engines and turbine engines for the fuel-rich partial oxidation of the flare gas to form synthesis gas, and reactors to convert the synthesis gas into the end product. In an embodiment the end product is methanol.

There are provided systems and methods for using fuel-rich partial oxidation to produce an end product from waste gases, such as flare gas. In an embodiment, the system and method use air-breathing piston engines and turbine engines for the fuel-rich partial oxidation of the flare gas to form synthesis gas, and reactors to convert the synthesis gas into the end product. In an embodiment the end product is methanol.

There are provided systems and methods for using fuel-rich partial oxidation to produce an end product from waste gases, such as flare gas. In an embodiment, the system and method use air-breathing piston engines and turbine engines for the fuel-rich partial oxidation of the flare gas to form synthesis gas, and reactors to convert the synthesis gas into the end product. In an embodiment the end product is methanol.

There are provided systems and methods for using fuel-rich partial oxidation to produce an end product from waste gases, such as flare gas. In an embodiment, the system and method use air-breathing piston engines and turbine engines for the fuel-rich partial oxidation of the flare gas to form synthesis gas, and reactors to convert the synthesis gas into the end product. In an embodiment the end product is methanol.

A method for recycling CO.sub.2 from CO.sub.2 containing inputs to produce hydrocarbon products includes the steps of (i) capturing CO.sub.2 from at least one CO.sub.2 containing input, at least one of the at least one CO.sub.2 containing input including air; (ii) producing a CO.sub.2 feed stream from the captured CO.sub.2; (iii) reacting the CO.sub.2 feed stream with a H.sub.2 feed stream to produce a methane containing output; and (iv) separating the methane containing output so as to at least provide methane and a first waste output, wherein the first waste output is incinerated or gasified to provide one of the at least one CO.sub.2 containing inputs for step (i).