Hot zone formation during carbon monoxide oxidation in a radial flow reactor

Formation and dynamics of a hot zone in radial flow reactor

“…2 Ž . In earlier work Marwaha et al, 2001 we found that an Ž . interaction global coupling existed between the effluent in the vessel and catalyst surface.…”

Dynamics of hot zones on top of packed-bed reactors

“…The results reported here are a part of our ongoing investigation (Marwaha et al, 2001;Luss, 2002, 2003) of the formation and dynamics of transverse temperature patterns in shallow packed-bed reactors. The test reaction, the catalytic oxidation of carbon monoxide was run under conditions for which steady-state multiplicity existed for some feed temperatures.…”

“…Middya et al (1994) pointed out that global coupling can affect the dynamic features of spatio-temporal temperature patterns on catalytic surfaces and stabilize patterns that would not exist in its absence. Such patterns were observed on catalytic wires and ribbons (Lobban et al, 1989;Philippou et al, 1991), catalytic rings (Graham et al, 1993;Annamalai et al, 1997), hollow cylindrical catalytic pellets (Annamalai et al, 1999) and in a radial-flow packed-bed reactor (Marwaha et al, 2001). One of our objectives was to investigate if the transverse hot zone on the top of a packed bed are affected by global coupling.…”

Control Reaction Path of CO Oxidation by Regulating the Oxidation State of Au Species

“…The difference of temperature variation was much more remarkable. Marwaha et al [19] reported that heat generation and heat removal significantly determine change of product distribution depending on the contact. In order to eliminate the effect of contact time, the catalyst bed temperatures were studied in the same space velocity.…”