NOVELTY - Forming (P1) greater than or equal to 2C hydrocarbons, involves forming a dispersion comprises synthesis gas bubbles dispersed in a liquid phase containing hydrocarbons in a high shear device, where the average bubble diameter of the synthesis gas bubbles is less than 1.5 mu m; introducing the dispersion into a reactor (10); and removing a product stream comprises liquid hydrocarbons from the reactor.    USE - For preparation greater than or equal to 2C hydrocarbon (claimed) from carbon monoxide and hydrogen.    ADVANTAGE - The method reduces operating costs and increases production from existing process. The high shear mechanical device to rapid contact and mixing of chemical ingredient in a controlled in the reactor. The high shear device reduces the mass transfer limitation on the reaction and the increases the overall reaction rate, and allow substantial reaction of carbon monoxide and hydrogen under global operating condition under which substantial reaction expected occur. The method use catalyst e.g. ruthenium, which increases contact with catalyst, thus decreases mass transfer resistance.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a system (1) for converting carbon monoxide gas and hydrogen gas into greater than or equal to 2C liquid and gaseous hydrocarbons comprising at least one high shear mixing device (40) containing at least one generator having a rotor and a stator separated by a shear gap, where the shear gap is the minimum distance between the rotor and the stator, and where the high shear mixing device is capable of producing a tip speed of the rotor of greater than 22.9 m/s (4500 feet/minutes); and a pump (5) configured for delivering a fluid stream containing liquid medium to the high shear mixing device.    DESCRIPTION OF DRAWING(S) - The figure shows process flow diagram of a high shear Fischer-Tropsch system.    High shear Fischer-Tropsch system (1)    Pump (5)    Reactor (10)    High shear mixing device (40)    Heat transfer devices (60, 80)