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Article
Hydrogen production in a zigzag and straight catalytic wall coated micro channel reactor by CFD modeling
International Journal of Hydrogen Energy (2010)
  • Mohsen Behnam, Worcester Polytechnic Institute
  • Ali Fazeli, University of Tehran
Abstract

Hydrogen production from steam reforming of methanol for fuel cell application was modeled in a wall coated micro channel reactor by CFD approach. Heat of steam reforming (SR) was supplied from catalytic total oxidation (TOX) of methanol on Cu/ZnO/Al2O3 catalyst and Heat conducts from TOX to SR zone through Steel divider wall between two channels. Heat integration was compared in zigzag and straight geometry of microreactor by CFD modeling. The model is two dimensional, steady state and containing five zones: TOX fluid, TOX catalyst layer, steel wall of the channel, SR catalyst layer and SR fluid. Set of partial differential equations (PDEs) including x and y momentum balance, continuity, partial mass balances and energy balance was solved by finite volume method. Stiff reaction rates were considered for methanol total oxidation (TOX), methanol steam reforming (SR), water gas shift (WGS) and methanol decomposition (MD) reactions. The results show that zigzag geometry is better than straight one because heat and mass transfer in zigzag reactor are more than straight. Conversion of methanol in zigzag geometry is greater than straight one. In the outlet of zigzag micro channels, carbon monoxide selectivity is less and hydrogen mole fraction is more than straight one.

Keywords
  • Wall coated catalytic micro channel reactor; Microreactor; CFD modeling; Methanol steam reforming; Hydrogen production; Zigzag geometry
Disciplines
Publication Date
Fall June 30, 2010
Citation Information
Mohsen Behnam and Ali Fazeli. "Hydrogen production in a zigzag and straight catalytic wall coated micro channel reactor by CFD modeling" International Journal of Hydrogen Energy Vol. 35 Iss. 17 (2010)
Available at: http://works.bepress.com/mohsen_behnam1/5/