Decline in Hydrogen Permeation Due to Concentration Polarization and CO Hindrance in a Palladium Membrane Reactor

• Published in: Industrial & engineering chemistry research Vol. 38; no. 12; pp. 4913 - 4918
• Main Authors: Hara, S, Sakaki, K, Itoh, N
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.12.1999
• Subjects: 01 COAL, LIGNITE, AND PEAT; 08 HYDROGEN; Applied sciences; CARBON MONOXIDE; Catalysis; Catalytic reactions; Chemical engineering; Chemistry; DECOMPOSITION; Exact sciences and technology; General and physical chemistry; HYDROGEN; MATHEMATICAL MODELS; MEMBRANE TRANSPORT; METHANOL; PALLADIUM; PERMEABILITY; Reactors; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Palladium base alloys; Indium Alloys; Hydrogen; Conversion rate; Modeling; Silica; Supported catalyst; Membrane separation; Membrane reactor; Ruthenium Alloys; Radial diffusion; Carbon monoxide; Argon; Mathematical model; Platinoid; Methanol; Catalytic reaction; Theoretical study; Catalytic reactor; Transition metal; Palladium; Experimental study; Runge Kutta method; Primary alcohol; Gaseous permeation; Heterogeneous catalysis; Binary mixture; Gas permeability; Tubular membrane; Chemical decomposition; Numerical simulation; Kinetics; Inorganic membrane
• ISSN: 0888-5885; 1520-5045
• DOI: 10.1021/ie990200n

Hydrogen separation from binary gas mixtures, Ar−H2 and CO−H2, using a double-tube type of palladium membrane reactor (PMR) was carried out and analyzed by solving mathematical models taking into account mixing diffusion of hydrogen in the radial direction of the catalyst-packed bed. The experiment showed that carbon monoxide prevented hydrogen permeation through the membrane at temperatures less than 280 °C. The decline in hydrogen permeation could be estimated by solving a model describing the concentration polarization and the hindrance by cabon monoxide. Furthermore, the mathematical models were applied to analyze methanol decomposition in the same PMR, showing that a drop in hydrogen permeation due to both the factors had a significant influence on the performance of the PMR.