Methanol steam reforming in a fuel cell drive system, J. The logistic implications of this are great; pressurized hydrogen is difficult to store and produce.
The primary advantage of a vehicle with a reformer is that it does not need a pressurized gas tank to store hydrogen fuel; instead methanol is stored as a liquid.
Power Sources 71 Wiese, W. Meanwhile, a reduced Reynolds number on the micro reformer side would increase the methanol conversion. Hydrogen is then separated from the other reactants and products in a later chamber, either by pressure swing adsorption PSAor through use of a membrane where the majority of the hydrogen passes through.
Power Sources 86 However, methanol, like gasolineis toxic and of course flammable. Power Sources 84 Peters, R. With a higher Reynolds number on the combustor side, the wall temperature is increased and the methanol conversion can thus be enhanced. With either design, not all of the hydrogen is removed from the product gases raffinate.
Advantages and disadvantages[ edit ] Methanol reformers are being considered as a component of a hydrogen fuel cell-powered vehicle. There are two basic methods of conducting this process. Technology[ edit ] A mixture of water and methanol with a molar concentration ratio water: The results also reveal that appropriate geometric parameters exist for a micro reformer with a combustor to obtain better thermal management and methanol conversion.
The cost of the PdAg membrane and its susceptibility to damage by temperature changes provide obstacles to adoption. Investigation of a methanol concept considering the particular impact of dynamics and long-term stability for use in a fuel-cell-powered passenger car, J.
This method is typically used for larger, non-mobile units. The hydrogen that is created is separated through the use of Pressure swing adsorption or a hydrogen-permeable membrane made of polymer or a palladium alloy.
Previous article in issue. Angewandte Chemie International Edition 44 The water-methanol mixture is introduced into a tube-shaped reactor where it makes contact with the catalyst.
The effects of the flow configurations for co- and counter-current flows are explored in the present study. The influences of the Reynolds number Re and various geometric parameters on heat and mass transfer phenomena in the channels are also investigated numerically.
The hydrogen is thereby separated out of the reaction chamber as the reaction proceeds, This purifies the hydrogen and, as the reaction continues, increases both the reaction rate and the amount of hyrogen extracted. Since the remaining gas mixture still contains a significant amount of chemical energy, it is often mixed with air and burned to provide heat for the endothermic reforming reaction.
In this, relatively new approach, the reaction chamber is made to contain high-temperature, hydrogen-permeable membranes that can be formed of refractory metalspalladium alloys, or a PdAg-coated ceramic.HYDROGEN PRODUCTION FROM INTEGRATED METHANOL REFORMING OVER Cu-ZnO/Al2O3 AND Pt/Al2O3 CATALYSTS FOR PEM FUEL CELLS Weidong Gu, Jian-Ping Shen and Chunshan Song* Clean Fuel and Catalysis Program, The Energy Institute and.
Kinetics of Methanol Steam Reforming with a Pd–Zn–Y/CeO 2 Catalyst under Realistic Operating Conditions of a Portable Reformer in Fuel Cell Applications Oleg M.
Ilinich, Ye Liu, Earl M. Waterman, and Robert J. Farrauto. A microreactor for in-situ hydrogen production by catalytic methanol reforming Ashish V. Pattekar and Mayuresh V.
Kothare∗ Department of Chemical Engineering, Lehigh University, Bethlehem, PA, USA.
Development of a methanol reformer for fuel cell vehicles Bård Lindström KTH-Kungliga Tekniska Högskolan Department of Chemical Engineering and Technology. Inserted-Plate Coated of Methanol Steam Reformer High Efficiency Inserted-Plate Coated of Methanol Steam Reformer: PEM Fuel Cell Applications Methanol can be easily stored and transported and converted to H2 using a.
High Efficiency Inserted-Plate Coated of Methanol Steam Reformer: PEM Fuel Cell Applications. Methanol can be easily stored and transported and converted to H2 using a reforming reactor that makes it an excellent hydrogen and energy source for fuel cell applicationsEasily storage, transporting and converting to H2 by a reforming reactor using makes it an excellent energy source for PEMFC.Download