| 摘要 |
307,027. Gasverarbeitungsges. March 1, 1928, [Convention date]. Heating gases.-Hydrogen for use in catalytic reactions is heated by passage through a heat exchanger in counter current with an inert gas such as nitrogen. The inert gas may be heated by passing it through a tube ,heated by direct flame or by molten metal. Preliminary heating of the cold gases to a temperature not greater than 400‹ C. is obtained by heat exchange with gases from the reaction. The gases may also be heated by passing them through a purification catalyst, and the heating effect so produced may be increased by the addition of carbon monoxide or oxygen, e.g. by the addition of 3 to 5 per cent of oxygen. Catalysts are employed for the purification containing metals of the eighth group or compounds which are converted into those metals. The water formed in the purification process may be removed by drying or freezing in known manner. |
