Methane-steam reforming

Journal Article · Tue Jan 01 04:00:00 EST 1980 · Catal. Rev. - Sci. Eng.; (United States)

DOI:https://doi.org/10.1080/03602458008068059· OSTI ID:6844102

Van Hook, J P

The literature relating to the kinetics of methane-steam reforming involving integral and differential reactor data, porous nickel catalysts and nickel foil, and data over large ranges of temperature (500 to 1700/sup 0/F), pressure (0.01 to 50 atm), and intrinsic catalyst activities (200,000-fold) was reviewed. A simple reversible first-order kinetic expression for the steam-methane reaction appears to be applicable throughout the operable region of steam-to-carbon ratios. Internal pore diffusion limitation on the conversion rate, due to catalyst size and/or intrinsic catalyst activity and total operating pressure was underlined. S-shaped Arrhenium plots (changing activation energy) are obtained when steam reforming is conducted over a temperature range sufficient to produce intrinsic kinetics (low temperature, inactive catalyst, or small catalyst size), pore diffusional limitations, and reaction on the outside surface. Homogeneous gas-phase kinetics appear to contribute only at relatively high temperature (1400/sup 0/F). In steam reforming, the water-gas shift reaction departs from its equilibrium position, especially at low methane conversion level. A general correlation of approach to water-gas shift equilibration as a function of conversion level only was indicated. (DP) 18 figures, 6 tables.

• Research Organization: Research and Development Center, Houston, TX
• OSTI ID: 6844102
• Journal Information: Catal. Rev. - Sci. Eng.; (United States), Journal Name: Catal. Rev. - Sci. Eng.; (United States) Vol. 21:1; ISSN CRSEC
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080103* -- Hydrogen-- Production-- Steam Reformer Processes
ALKANES
CARBON
CATALYSTS
CHEMICAL REACTIONS
ELEMENTS
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN PRODUCTION
KINETICS
LOW PRESSURE
MEDIUM PRESSURE
METALS
METHANE
NICKEL
NONMETALS
ORGANIC COMPOUNDS
REACTION KINETICS
REFORMER PROCESSES
STEAM REFORMER PROCESSES
TRANSITION ELEMENTS
WATER GAS PROCESSES