Reactive desulfurization of fuel gas in fuel cell heating systems, comprises: (a) converting a sulfur companion in an oxidation catalyst (8) with the addition of atmospheric oxygen or oxygen in sulfur oxides; and (b) adsorptively removing the sulfur oxides...

Reduction of the amount of sulfur trioxide in the exhaust gas of an internal combustion engine involves contacting the exhaust gas containing sulfur oxide with sulfate absorbent at a temperature lower than a releasing temperature and raising the temperatur...