a. an electrolysis step where an electrolyzer feed stream comprising water is converted to an electrolyzer product stream comprising hydrogen and oxygen, where electricity is used in the electrolysis step, and where at least a portion of the electricity used in the electrolysis step is from renewable or low carbon sources;

b. a reverse water gas shift step where at least a portion of the hydrogen from the electrolyzer product stream is mixed with carbon dioxide to form a reverse water gas shift feedstock stream, and wherein the reverse gas shift feedstock stream is heated to a temperature greater than 1400° F., and where the electricity used in a radiant furnace to heat the reverse water gas shift feedstock stream is less than 0.5 MWh electricity/metric ton, and where the hydrogen from the reverse water gas feedstock stream is reacted with the carbon dioxide of the reverse water gas feedstock stream to produce a reverse water gas shift product stream comprising carbon monoxide, and where there is a per pass conversion of carbon dioxide to carbon monoxide when the carbon dioxide is reacted with the hydrogen in the reverse water gas shift reaction, and wherein the per pass conversion is between 30 and 90 mole %;

c. a hydrocarbon synthesis step where at least a portion of the hydrogen from the electrolyzer product stream is reacted with a stream comprising at least a portion of the reverse water gas shift product stream to produce a hydrocarbon synthesis product stream comprising hydrocarbons, where there is a per pass conversion of carbon monoxide to the hydrocarbons, and where the per pass conversion is between 30 to 80 mole % carbon monoxide per pass.