Microreactors with Pt/zeolite catalytic films for the selective oxidation of CO in simulated reformer streams

• Published in: Catalysis today Vol. 147; pp. S10 - S16
• Main Authors: Sebastian, V., Irusta, S., Mallada, R., Santamaría, J.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.09.2009; Elsevier
• Subjects: Catalysis; Chemistry; CO SELOX; ETS-10; Exact sciences and technology; Faujasite; General and physical chemistry; Ion-exchange; Microreactor; Platinum; Selective oxidation; Surface physical chemistry; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Zeolites: preparations and properties; Selective oxidation; Microreactor; ETS-10; Platinum; CO SELOX; Faujasite; Catalytic reaction; Support; Film; Fixed bed reactor; Transition metal; Zeolite; Molecular sieve; Heterogeneous catalysis; Synthesis; Stainless steel; Oxidation; Hydrothermal condition; Diameter
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/j.cattod.2009.07.061

The selective oxidation (SELOX) of CO in the presence of H 2, CO 2 and H 2O has been carried out on stainless steel microreactors with 500 μm diameter microchannels. To this end, catalytic films consisting of Pt supported on zeolite Y (Pt-FAU) or ETS-10 (Pt-ETS10), were prepared by seeded hydrothermal synthesis on the surface of the reactor microchannels to give a uniform, mechanically stable catalytic coating on the channel surface. Activity tests were performed with feeds consisting of CO and H 2, plus CO 2 and/or H 2O. The best performance was obtained on microreactors coated with Pt-FAU catalytic films. When feeds representative of real reformate streams (containing CO 2 and H 2O) were fed to Pt-FAU coated reactors, the microreactor clearly outperformed the fixed bed reactor giving light-off temperatures that were lower by almost 50 °C.