Exhaust gas thermal enhancer

The invention relates to an exhaust gas thermal enhancer (TE) to be installed to gas pipe (PIP) for increasing exhaust gas temperature in gas fluid (FLUID) to start the reaction of removing methane from gas fluid (FLUID) in diesel engine exhaust gas or equivalent gas fluids. The invention also relates to a method for manufacturing and to a method to use such an exhaust gas thermal enhancer. Said exhaust gas thermal enhancer (TE) comprise at least one front heater (FOC) for heating said gas fluid (FLUID) and upstream to said front heater (FOC) there is at least one fuel injector (FUI) for injecting fuel (FUEL) and at least one fuel vaporizer (VAP), which is a separate structure or integrated to said fuel injector (FUI), and that downstream to said front heater (FOC) there is at least one oxidation catalyst (OC1, OC2) for catalyzing the oxidation of methane..