Application of wavefront analysis for kinetic investigations of watergas shif reaction

✍ Scribed by E. Fiolitakis; U. Hoffman; H. Hofmann

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 847 KB
• Volume: 35
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(80)85092-5

✦ Synopsis

It has been demonstrated that durmg dynamic operation of the low temperature watergas shift reactlon on the wavefront the CO,-production IS faster than the H,-productlon For a catalyst pretreated for several hours with a mixture of CO/N, its re-oxldatlon by a mixture of H,O/CO/N, IS a slow process, whereas on the wavefront the H,-concentration IS twofold the CO,-concentration The quantitative analysis of CO,-wavefront data for a catalyst pretreated for several hours with a H,O/N,-mixture has given a reactron order nc, = 0 625 and an activation energy E = 46 27 kJ/mole for the CO oxldatlon It is shown that H,O mhlblts the CO oxldatlon For a catalyst pretreated for a long time period with a H,O/N-mixture and then reduced m a short tnne period by a H,O/CO/N-mixture the reoxldatlon by a I-%,0/N,-mixture 1s a slow process The wavefront analysis has also been applied to clear-up the H,O-sorption on the low temperature catalyst, suggestmg that a physisorptlon ofLangmulr type 1s combined with a second mechamsm saturatmg the H,O-capacitance for low values of PHz,