By James J Spivey; Yi-Fan Han; K M Dooley
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Extra resources for Catalysis, Volume 25
Guarinoni and M. Østberg, Catalytic partial oxidation of natural gas at elevated pressure and low residence time, 9–20, Copyright (2001), with permission from Elsevier. Concerning the issue of measuring the catalyst temperature under working conditions, an early solution has been the use an infrared camera directly pointed at the wall of a quartz reactor. In this arrangement, the external radiation is collected and associated with the temperature of the solid by means of a calibration. 73,74 A schematic drawing and an example of the results reported by Basini group is given in Fig.
We have illustrated with some detail the data obtained in our laboratory with the use of the annular reactor; some of the major ﬁndings that have an immediate impact on the modeling of CPO-reformers are the following: – under chemically controlled conditions, fuel oxidation gives rise to CO2 and H2O; the reaction rate is proportional to the concentration of the fuel and independent of the concentration of O2. 30 as the condition of an oxygen saturated surface where the unique kinetically relevant step is the rupture of the ﬁrst C-H bond.
Vlachos, A. Beretta, G. Groppi and E. Tronconi, Fig. 3. 1039/9781849737203-00001 View Online and O* (from dissociation of molecular oxygen that slowly diﬀuses from the gas-phase). A fraction of the OH* reacts with H* giving H2O*, leading to gaseous H2O, and with CO*, giving eventually rise to CO2. The slow-down of the CO* and H* oxidation reactions makes desorption of syngas competitive with its combustion. As a result, syngas is produced via a ‘‘direct route’’, since H2O adsorption is not needed.