Die Darstellung atomaren Wasserstoffs bei höheren Drucken

Pure and dry hydrogen is partially dissociated into atoms on a tungsten filament at 2500° K at pressures of about 20 mm Hg. This filament is mounted in a quartz tube (diam.17 mm) the walls of which are covered with an anticatalytic layer. The tube is surrounded by a water jacket. The mixture of atomic and molecular hydrogen is hereby cooled to room temperature. A stream of cold hydrogen with a constant content of some percentage of atoms during several hours is obtainable for preparatory purposes.