Exact uniqueness and multiplicity criteria for a positive-order Arrhenius reaction in a lumped system

✍ Scribed by T.T. Tsotsis; R.A Schmitz

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 341 KB
• Volume: 34
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(79)85188-x

✦ Synopsis

CL 5r 2De. ,-' . 4-: ' 2l-4 8 10 12 14 16 F@ 3 Effective drffuslvity data for a typical catalyst support measured at 13 25 cm/s carrier gas velocity The curves labeled 20, and De/2 show the sensltrvlty of the technique Solid curve = expenmental data Dotted curves = model slmulatlons This difference can be attrtbuted to a skm effect III the catalyst support, that IS, the tracer senses deeper into the pellet as a result of decreasing carrier gas flow rate This mflence of earner gas flow rates on the measured effective dtiuslvity has been treated m detad elsewhere [9] CONCLUSIONS The sensltlvlty of pulse dtiusivity measurements can be unproved by the appropriate selection of the tamer and tracer gases A mtrogen m helium system at 40°C or shghtly lower