OP-II-3

OP-II-6MICROCHANNEL REACTOR WITH A Cu/CeO 2-x CATALYTICCOATING FOR PREFERENTIAL CO OXIDATION.OPERATION, MODELING, AND SCALE-OUTSnytnikov P.V. 1,2 , Potemkin D.I. 1,2 , Rebrov E.V. 3 ,Hessel V. 3,4 , Schouten J.C. 3 , Sobyanin V.A. 1,21 Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva, 5, Novosibirsk, 630090,Russia, pvsnyt@catalysis.ru2 Novosibirsk State University, Pirogova St., 2, Novosibirsk, 630090, Russia3 Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven,the Netherlands4 Institut fur Mikrotechnik Mainz GmbH, Carl-Zeiss-Strasse 18-20, 55129 Mainz,GermanyPreferential CO oxidation (PrOx) is one of the promising methods for CO removalfrom hydrogen-rich gas mixtures produced by hydrocarbons conversion processes.Several advantages of applying microreactors in comparison with conventional fixedbedtechnology for the highly exothermic CO PrOx reaction were demonstrated indifferent studies [1-5]. A high rate of heat removal from the thin catalytic filmdeposited onto the microchannel walls allows for near-isothermal operation and inthis way prevents the onset of side reactions (viz., hydrogen oxidation or reverseWGS) and extends the operational window [2-4].According to our previous work [4], the copper-cerium oxide catalytic system is avery promising one for efficient CO removal from a hydrogen-rich gas usingmicroreactor technology. Simple sandwiched (two-plate) and laser-welded microchannelreactors were used for catalyst testing. The catalyst performance forpreferential CO oxidation in H 2 excess was studied in a flow setup with on-linechromatographic analysis of the reaction products. Catalytic performance of themicrochannel reactors were checked using model feeds at WHSV = 50÷500 L g –1 h –1and temperature 100÷300°С. The washcoated catalyst in the microchannel reactorshowed high activity and selectivity. The CO concentration was decreased from1 vol% to 10 ppm at a selectivity of 60%, at a temperature of 190 o C, and a WHSV of55 L g –1 h –1 . The CO outlet concentration and the reactor temperature increasedwhen the WHSV was increased from 50 to 500 L g –1 h –1 . An increase of the O 2concentration from a 1.2 to 3 fold excess reduced the CO concentration to 10 ppm ina broad temperature interval at WHSVs up to 275 L g –1 h –1 .Catalytic experiments have been performed that allowed determining theapparent activation energy of the reactions of CO and H 2 oxidation, the reactionorders with respect to O 2 and CO. Results of numerical modeling of the PrOx108