OP-II-3

OP-II-6reaction over Cu/CeO 2-x catalysts using estimated kinetic parameters were in a goodagreement with the experimental data.B10000A1000B[CO] outlet, ppm10010WHSV, L g -1 h -1801602401120 160 200 240 280Temperature, o CFigure 1. Microreactor assembly (A)with gas distribution fittings (B).Figure 2. The CO outlet concentration in thepreferential CO oxidation as a function of thereactor temperature at a WHSV.The reformate composition is: 1.5 % CO, 2.25 % O 2 ,57 % H 2 , 10 % H 2 O, 20 % CO 2 , with He as balance.An authothermal preferential CO oxidation device consisting of an array of 26microchannel reactors connected in parallel was designed for operation with a 100W ePEM FC system (Fig.1). In this design, the external surface area of the individualmicrochannel reactors was used for heat-exchange with the environment to maintainthe desired operation temperature. Thus, the heat flux via the external surface areasof the parallel microchannel reactors and the fittings was equal to the heat producedby the reaction. The carbon monoxide concentration in a realistic reformate gas wasreduced from 1.5 vol.% to 10 ppm (Fig 2.) at an oxygen to carbon monoxide ratio of1.5 within the temperature range of 230 - 240 °C, which is close to the temperature ofthe low temperature water gas shift reactor. This facilitates the assembling of the COPrOx and WGS microreactors without the need for an intermediate heat-exchangerto achieve higher efficiencies in the overall fuel processing.References[1]. E.R. Delsman, B.J.P.F. Laarhoven, M.H.J.M. de Croon, G.J. Kramer, J.C. Schouten,Chem. Eng. Res. Des. (2005) V.83 P.1063.[2]. X. Ouyang, R.S. Besser, J. Power Sources (2005) V.141 P.39.[3]. X. Ouyang, L. Bednarova, R.S. Besser, P. Ho, AIChE J. (2005) V.51 P.1758.[4]. P.V. Snytnikov, M.M. Popova, Y. Men, E.V. Rebrov, G. Kolb, V. Hessel, J.C. Schouten,V.A. Sobyanin, Appl. Catal. A (2008) V.350 P.53.[5]. G. Chen, Q. Yuan, H. Li, S. Li, Chem. Eng. J. (2004) V.101 P.101.AcknowledgementsThe work was partially supported by grant “UMNIK“ of the FASIE, МК-5602.2010.3 (grantof the President of the Russian Federation) and GC №P185 of FFP “SSESIR 2009-2013”.109