NOVELTY - Producing liquid fuels with zero carbon dioxide emission and zero usage of water comprises: providing a syngas; subjecting syngas to Fischer-Tropsch synthesis to produce a hydrocarbon product stream; separating hydrocarbon stream into 1-4C, and C5+ hydrocarbons; providing an enhanced catalytic dehydrogenation process by injection of methane gas; subjecting 1-4C hydrocarbon stream to catalytic dehydrogenation process to produce hydrogen and multi-walled carbon nanotubes; and mixing hydrogen with syngas to increase hydrogen/carbon monoxide ratio of the gas for Fischer-Tropsch synthesis to greater than or equal to 2.    USE - The method is useful for producing liquid fuels from coal and natural gas (claimed).    ADVANTAGE - The method: provides liquid fuels with zero carbon dioxide emission and zero usage of water (claimed); and utilizes methane, which eliminates the need for the standard water gas shift reaction to the syngas and increases the hydrogen of the syngas in Fischer-Tropsch synthesis and thus eliminates the use of water in the process and converts the carbon in the gases into multi-walled carbon nanotubes.    DETAILED DESCRIPTION - Producing liquid fuels with zero carbon dioxide emission and zero usage of water comprises: providing a syngas by the gasification of coal or biomass; subjecting the syngas to Fischer-Tropsch synthesis to produce a hydrocarbon product stream; separating the hydrocarbon product stream into gaseous hydrocarbons of 1-4C hydrocarbons (methane, ethane, propane, butane), and C5+ hydrocarbons used for the production of liquid fuels; providing an enhanced catalytic dehydrogenation process by the injection of a stream of methane gas, where the stream of methane gas increases the hydrogen/carbon monoxide ratio to greater than or equal to 2; subjecting the 1-4C hydrocarbon stream to the enhanced catalytic dehydrogenation process to produce hydrogen and multi-walled carbon nanotubes; and mixing the hydrogen with the syngas to increase the hydrogen/carbon monoxide ratio of the gas for Fischer-Tropsch synthesis to greater than or equal to 2, thus enabling production of liquid fuels without the use of water and eliminating the production of carbon dioxide.