NOVELTY - The apparatus comprises a window, a gas supply input to receive gases from a water splitter (102) having a photoelectrolysis cell to split water molecules into hydrogen and oxygen molecules via to the solar energy directed at the cells, a chemical reactor chamber (106a) to mix the heated carbon dioxide gas with the hydrogen molecules from the splitter in the form of gas in a reverse-water-gas-shift reaction to produce resultant carbon monoxide and water molecules as well as unconsumed carbon dioxide gas and hydrogen molecules, and a recuperator (105a).    USE - The apparatus is useful in solar assisted reverse-water-gas-shift reaction to create a liquid hydrocarbon fuel such as methanol, ethanol, diesel fuel, gasoline and crude oil.    ADVANTAGE - The apparatus ensures energy efficient and economical production of carbon monoxide by achieving equilibrium in the solar assisted reverse-water-gas-shift reaction of hydrocarbon fuel.    DETAILED DESCRIPTION - The apparatus comprises a window, a gas supply input to receive gases from a water splitter (102) having a photoelectrolysis cell to split water molecules into hydrogen and oxygen molecules via to the solar energy directed at the cells, a chemical reactor chamber (106a) to mix the heated carbon dioxide gas with the hydrogen molecules from the splitter in the form of gas in a reverse-water-gas-shift reaction to produce resultant carbon monoxide and water molecules as well as unconsumed carbon dioxide gas and hydrogen molecules, a recuperator (105a) to pre-heat both the carbon dioxide gas and the hydrogen molecules from the splitter using an energy of the resultant carbon monoxide exiting the chamber, where the reverse-water gas-shift reaction is occurred, a gas supply output to supply the resultant carbon monoxide and hydrogen molecules and unconsumed carbon dioxide from the reaction to a hydrocarbon fuel synthesis reactor to create a liquid hydrocarbon fuel, and an optical filter to pass the electromagnetic spectrum. A first solar receiver focuses a solar energy thru the window to a solar-energy-to-gas-heat-exchanger (122) to heat carbon dioxide gas via convection heating of the carbon dioxide gas from the heated exchanger, and is an array of heliostats that focuses the solar energy from their mirrors onto a dish on a first tower portion of the splitter, which is coated with the optical filter. The cells include first solar receivers, an array of heliostats separate from the first solar receiver and a parabolic trough separate from the first solar receiver. The splitter comprises the trough contains a set of parabolic mirrors, and a high-temperature electrolysis cells for water electrolysis that decompose the water into the oxygen and hydrogen molecules in the form of gas due to an electric current passed through the water with most of the energy causing the high temperature above 280 degrees C supplied heat from the solar energy to separate array of heliostats. Each parabolic mirror connects to a tracking actuator to rotate that mirror in both an azimuth axis and an elevation axis, and reflects the sunlight upwards in a frame of the trough at a focal line of the trough onto an associated light receiver that contains tubes with a titanium based catalyst forming the cells, which receive UV rays and visible light from an array of heliostats splits the water into the hydrogen and oxygen molecules via the titanium based catalyst, which absorbs both wavelengths in the UV spectrum and the visible light directed from the array of heliostats, and is present in a shape to strain the catalyst to pull apart its atoms or even compress together its atoms in order to alter the material's electronic properties and allow the titanium based catalyst, which consists of titanium oxide nanotubes in a strained shaped ripple pattern coated with a tungsten oxide to enhance the visible spectrum absorption of the nanotube array as well as their solar-spectrum induced photocurrents. The light receiver and frame in the trough is tilted at a slight upward angle to allow disassociated gases of hydrogen and oxygen from the water splitting process to naturally float upward and is collected/harvest for future use. INDEPENDENT CLAIMS are included for:    (1) a method for a hydrocarbon fuel synthesis process to create a liquid hydrocarbon fuel; and    (2) a system for hydrocarbon fuel synthesis process to create a liquid hydrocarbon fuel.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a solar assisted process to create a hydrocarbon liquid fuel.    Water splitter (102)    Heat recuperator (105a)    Chemical reaction chamber (106a)    Solar-energy-to-gas-heat-exchanger (122)    Quenching unit. (130)