Kinetics steam reforming

L., Renken, A., Catalyst coating in microreactors for methanol steam reforming kinetics, in Matlosz, M., Ehrfeld, W., Baselt, J. P. (Eds.), Microreaction Technology - IMRET 5 Proc. of the 5th International Conference on Microreaction Technology, Springer-Verlag, Berlin, 2001, 322-331. 

Two papers have appeared on the kinetics of the steam reforming of heptane over nickel catalysts.205 206 The first concerns the steam reforming of heptane at low concentrations for injection into internal combustion engines the catalyst was Ni-Al203 and the reaction temperature was in the range 360-406 °C.205 The second concerned an evaluation of the intrinsic steam reforming kinetic parameters from rate measurements on full-size particles of a Ni-MgO catalyst in the temperature range 450-550 °C.206... 

All steam reforming catalysts in the activated form contain metallic nickel as active component, but the composition and structure of the support and the nickel content differ considerably in the various commercial brands. Thus the theoretical picture is less uniform than for the ammonia synthesis reaction, and the number of scientific publications is much smaller. The literature on steam reforming kinetics published before 1993 is summarized by Rostrup - Nielsen [362], and a more recent review is given by K. Kochloefl [422]. There is a general agreement that the steam reforming reaction is first order with respect to methane, but for the other kinetic parameters the results from experimental investigations differ considerably for various catalysts and reaction conditions studied by a number of researchers. 

Achenbach E, Riensche E (1994) Methane steam reforming kinetics for solid oxide fuel-cells. J Power Sources 52 283... 

T0ttrup, P.B. Evaluation of intrinsic steam reforming kinetic parameters from rate measurements on full particle size. Applied Catalysis, 1982, 4 (4), 377. 

Table 4 Steam reforming kinetics and mechanism summary of recent results... 

STEAM REFORMING KINETICS, CATALYST DEACTIVATION AND REACTOR DESIGN... 

The main conclusions from this detailed anlaysis of methane steam reforming kinetics can be summarized in the following points ... 

The steam reforming kinetics developed by Xu and Froment (1989a) are of a more general form than the previous steam reforming kinetics which explains a number of contradictions existing in the literature. 

S. Tosti, A. Basile, R. Borelli, F. Borgognoni, S. Castelli, M. Fabbricino, F. Gallucci and C. Licusati, Ethanol steam reforming kinetics of a Pd-Ag membrane reactor, Int. J. Hydrogen Energy, 2009, 34, 4747-4754. 

There are numerous reports on the reforming kinetics of CH4 on Ni catalysts, however, only few deals with the reforming over the anode of a real SOFC. Timmerman et al. studied internal reforming of methane at Ni/YSZ and Ni/CGO SOFC cermet anodes [59]. Nagakawa et.al studied steam reforming kinetics on a real operating fuel cell [19]. When the partial... 

Reuse et al. [16] applied a self-developed reactor carrying microstructured plates for the determination of methanol steam reforming kinetics over a commercial copper-based low-temperature water gas shift catalyst from Siid-Cliemie. Kinetic expressions were determined for both a tubular fixed-bed reactor containing 30 mg of catalyst particles and the microreactor coated with the catalyst particles. A power law... 

Tosti, S., Basile, A., Borelli, R., Borgognoni, F., CasteUi, S., Fabbricino, M., et al. (2009). Ethanol steam reforming kinetics of a Pd—Ag membrane reactor. International Journal of Hydrogen Energy, 34, 4747—4754. 

Xi, intrinsic = rate calculated with bulk fluid conditions The catalyst activity is calculated as a parameter, updated from operating data. 2.2 Naphtha Steam Reforming Kinetic Relationships... 

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