Elucidation of Behavior of Hydrogen on Solid Catalysts Using a Tritium Tracer Method

摘要

Hydrogen exchange reaction between tritiated gaseous hydrogen with hydrogen on several catalysts were carried out using a fixed bed pulse flow reactor at 100-600°C and under 1.57 MPa. The amounts of hydrogen uptake onto the catalysts were determined from the radioactivity balance of tritium between input and output. It was found that the hydrogen exchange reaction occurred over γ-Al_O_3, K/Al_2O_3, HY, and NaY but no hydrogen exchange was observed over SiO_2 and sulfated zirconia as well as quartz sand. Further, the process of hydrogen exchange was elucidated by analyzing in the wave shape of tritium pulse.