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By James J Spivey; Yi-Fan Han; K M Dooley

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5 Axial coordinate (cm) Fig. 21 CH4 CPO experiments in Rh-coated 400 cpsi honeycomb monolith. Effect of the position of the front heat shield (FSH). (a) FHS is a continuum with the catalytic monolith, (b) FHS is at a certain distance from the monolith, (c) FHS is removed. Adapted from: Topics in Catalysis, 54, 2010, 866, Optimal design of a CPO-reformer of light hydrocarbons with honeycomb catalyst: Effect of frontal heat dispersions on the temperature profiles, D. Livio, A. Donazzi, A. Beretta, G.

Adapted with permission from A. Beretta, G. Groppi, M. Lualdi, I. Tavazzi and P. Forzatti, Experimental and Modeling Analysis of Methane Partial Oxidation: Transient and Steady-State Behavior of Rh-Coated Honeycomb Monoliths, Ind. Eng. Chem. , 48(8), 3825–3836. Copyright (2009) American Chemical Society. 1039/9781849737203-00001 While it starts in the inlet hot portion of the reactor, it eventually extends to the whole reactor volume. 56. At the highest flow rate, the results indicated that catalyst deactivation occurred after prolonged exposure to the stoichiometric mixture, due to the high temperature reached at the hot spot (W960 1C).

Results are reported in Fig. 19. The spatially resolved measurement of the gas composition provided novel pieces of evidence concerning the evolution of C3H8 CPO. Aside from the typical profiles of syngas and total oxidation products, other intermediate species were observed, namely C2H4, C3H6, and C2H6, which peaked at the catalyst inlet and were completely consumed before the outlet (Fig. 19c). A complex evolution was revealed also in the case of CH4; the initial peak was followed by consumption within the first half of the catalyst and again by formation in the remaining part.

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