Hydrocarbon and alcohol fuels from variable, renewable energy at very high efficiency
A Renewable Fischer Tropsch Synthesis (RFTS) process is disclosed for producing hydrocarbons and alcohol fuels from wind energy, waste CO 2 and water. The process includes (A) electrolyzing water to generate hydrogen and oxygen, (B) generating syngas in a reverse water gas shift (RWGS) reactor, (C) driving the RWGS reaction to the right by condensing water from the RWGS products and separating CO using a CuAlCl 4 -aromatic complexing method, (D) using a compressor with variable stator nozzles, (E) carrying out the FTS reactions in a high-temperature multi-tubular reactor, (F) separating the FTS products using high-pressure fractional condensation, (G) separating CO 2 from product streams for recycling through the RWGS reactor, and (H) using control methods to maintain the temperatures of the reactors, electrolyzer, and condensers at optima that are functions of the flow rate. The RFTS process may also include heat engines, a refrigeration cycle utilizing compressed oxygen, and a dual-source organic Rankine cycle.
1 . A multi-tubular, fixed-bed reverse water gas shift (RWGS) reactor for the catalytic production of CO and H 2 O from CO 2 and H 2 ,
said RWGS reactor further characterized as utilizing a heating liquid having normal boiling point greater than 550 K selected from the set comprised of molten alloys, molten salts, and organic liquids.