a method of fuel treatment and distribution for an internal combustion engine including the steps as follows : operating an adiabatic reactor without a substantial amount of exhaust heat within an operational temperature range , the catalyst bed reactor including a partial combustion catalyst and a dissociation catalyst ; providing a substantial amount of engine exhaust heat to an endothermic reactor having an endothermic dissociation catalyst therein , vaporizing liquid alcohol to form alcohol vapor ; mixing the alcohol vapor with air to form a partial combustion mixture ; contacting the partial combustion mixture and the partial combustion catalyst whereby a dissociation mixture is formed and heat is evolved ; contacting the dissociation mixture and the dissociation catalyst to form a hydrogen rich fuel ; contacting the hydrogen - rich fuel and the endothermic dissociation catalyst to form a fuel product whereby at least a portion of any residual undissociated alcohol in the hydrogen - rich fuel is dissociated to hydrogen and carbon monoxide using the engine waste heat provided by the exhaust gas .