NOVELTY - Liquid gallium (Ga) fuel cell system, comprises combustor that receives hydrocarbon fuel and oxygen gas to form combustible gas mixture to generate, upon ignition, pressurized hot gas mixture including hydrogen gas and carbon monoxide; igniter; dehydrator; reducer; and fuel separator for separating Ga fuel from spent gases and recover Ga fuel.    USE - Useful for fuel cell powered electric vehicles.    ADVANTAGE - The fuel cell system provides electric vehicle that is efficient, has reduced noise and emissions. Provides electric vehicles that gain three times fuel mileage as compared to vehicles with internal combustion engines.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (a) method for removing and converting spent Ga fuel, in gallium hydroxide form, from liquid Ga fuel cell to Ga fuel for reuse in fuel cell;    (b) carbon dioxide separator connected with fuel separator for separating carbon dioxide from spent gases to provide nitrogen gas as pump propellant;    (c) gallium hydroxide separator for recovering gallium hydroxide from aqueous alkaline electrolyte and gallium hydroxide mixture, comprising filter that receives mixture to separate the gallium hydroxide; pump device providing the mixture to the filter; and gallium hydroxide collector to collect gallium hydroxide from filter;    (d) method for recovering gallium hydroxide from mixture of aqueous alkaline electrolyte solution and gallium hydroxide, comprising forcing mixture through filter disposed to separate gallium hydroxide from the mixture; removing filtered gallium hydroxide from filter with wash of liquid; and collecting gallium hydroxide and liquid in container;    (e) method for removing carbon dioxide from gas mixture that also includes nitrogen gas, comprising providing heat exchanger using liquid carbon dioxide as refrigerant to liquefy carbon dioxide gas moving through heat exchanger, and including vent for expulsion of carbon dioxide vapor: providing first pump device to pressurize and transport the gas mixture through heat exchanger at pressure and temperature to liquefy the gaseous carbon dioxide and form resulting intermixture that includes nitrogen gas and liquid carbon dioxide; providing pressure tank connected with first pump device to receive and separate liquid carbon dioxide from the intermixture, forming carbon dioxide-free gas composition; pumping gas mixture through heat exchanger forming the intermixture; and separating liquid carbon dioxide from intermixture in pressure tank, forming carbon dioxide-free gas composition;    (f) method for recovering Ga fuel from mixture including aqueous electrolytic alkaline solution and gallium hydroxide, comprising forcing the mixture through filter media to separate gallium hydroxide from solution; collecting gallium hydroxide from filter media; injecting hydrocarbon fuel and oxygen into combustor; mixing together hydrocarbon fuel and oxygen gas in combustor to form a combustible gas mixture to generate, upon ignition, pressurized hot gas mixture including hydrogen and carbon monoxide; igniting combustible mixture to form pressurized hot gas mixture; expelling hot gas mixture into dehydrator to provide heat for dehydration of gallium hydroxide to form gallium sesquioxide; introducing gallium hydroxide into dehydrator and dehydrating to form gallium sesquioxide; expelling gallium sesquioxide and hot gas mixture into reducer to reduce gallium sesquioxide to Ga fuel and form intermixture of Ga fuel and spent gases; expelling intermixture into fuel separator to separate Ga fuel from spent gases; collecting Ga fuel from fuel separator;    (g) Ga fuel generator for generating Ga fuel from gallium hydroxide, comprising combustor configured to receive hydrocarbon fuel and oxygen gas and mix them together to form combustible gas mixture to generate, upon ignition, pressurized hot gas mixture including hydrogen gas and carbon monoxide; ignitor disposed in combustor to ignite combustible mixture; dehydrator connected to combustor for receive hot gas mixture and configured to receive and dehydrate gallium hydroxide and form gallium sesquioxide; reducer connected to dehydrator to receive hot gas mixture and gallium sesquioxide and to reduce gallium sesquioxide and form intermixture of Ga fuel and spent gases; and fuel separator to receive fuel intermixture, and separate and recover Ga fuel from spent gases;    (h) carbon dioxide separator for removing carbon dioxide from gas mixture that includes oxygen gas, comprising heat exchanger using liquid carbon dioxide as refrigerant to liquefy carbon dioxide gas moving through heat exchanger, and including vent for expulsion of carbon dioxide vapor; first pump to pressurize and transport gas mixture through heat exchanger at pressure and temperature to liquefy carbon dioxide of the mixture and form resulting intermixture that includes oxygen gas and liquid carbon dioxide: and pressure tank connected with first pump device to receive and separate liquid carbon dioxide from intermixture, forming carbon dioxide-free gas composition;    (i) method for removing carbon dioxide from gas mixture that also includes oxygen gas, comprising providing heat exchanger using liquid carbon dioxide as refrigerant to liquefy carbon dioxide gas moving through heat exchanger, and including vent for expulsion of carbon dioxide vapor: providing first pump to pressurize and transport gas mixture through heat exchanger at pressure and temperature to liquefy gaseous carbon dioxide and form resulting intermixture that includes oxygen gas and liquid carbon dioxide; providing pressure tank connected with first pump to receive and separate liquid carbon dioxide from intermixture forming carbon dioxide-free gas composition; pumping gas mixture through heat exchanger forming intermixture: and separating liquid carbon dioxide from intermixture in pressure tank, forming carbon dioxide-free gas composition; and    (j) carbon dioxide separator for removing carbon dioxide from gas mixture that also includes nitrogen gas, comprising: heat exchanger using liquid carbon dioxide as refrigerant to liquefy carbon dioxide gas moving through heat exchanger, and including vent for expulsion of carbon dioxide vapor; first pump connected to gas mixture to pressurize and move gas mixture through heat exchanger at pressure and temperature to liquefy gaseous carbon dioxide and form intermixture that includes nitrogen gas and liquid carbon dioxide: and pressure tank connected with first pump to receive and separate liquid carbon dioxide from resulting intermixture, forming carbon dioxide-free gas composition.    DESCRIPTION OF DRAWING(S) - The figure shows liquid Ga generator system for processing by-product from liquid Ga alkaline electrolyte cell.    Line that expels lighter pressurized spent gases (24)    Line for spent gases going to boiler (25)    Line through heat exchanger to boiler (26)    Spent gas valve (S1)    Gallium fuel valve (S2)    Thermocouple. (T1)