DE1421596C3 - Fuel electrode structure - Google Patents

Description

3 4

going uniform introduction of fuel, this in carbon monoxide and hydrogen

is converted through the porous electrode surface 1 as well; then the second

Can be used as an electrode carrier. Catalyst layer 10 "made of iron oxide a conversion

The properties of the carrier Iß enable the development or "rearrangement" to carbon dioxide and Implementation of multiple catalyst processes. 5 causes hydrogen, after which passage In FIG. 2, for example, a coating 10 ′ made of hydrogen ions through the porous electrode 1 is depicted described catalyst material on the stand. In this way the unified scaffolding becomes Cell framework 10 applied, which in any way 10,10 ', 10 "both for multiple catalyst functions porous electrode 1 carries. The fuel is used as well as an electrode carrier. the as in Fig. 2 shown by the axial to the cells io heat from the electrochemical reaction in the arranged inlet 4 introduced. Fuel cell can also be beneficial evenly

For example, the electrode structure is shown via the electrode 1 in the cells 10 to the sub-Fig. 2 can be derived exceptionally well for conversion by supporting the conversion heat. Fuels such as methane, methanol, etc. are suitable. The electrode 1 itself, on the other hand, may be iron-if a hydrocarbon or other suitable oxide to carry out a catalytic function in the neter fuel introduced at 4 and a coating to serve in the manner described above, or 10 made of nickel, for example, in the first part of each of the surface of the framework 10 can be provided with a Channels 10 'and a second coating 10 "made, for example, of a porous electrode or a catalyst layer, refer Iron oxide can be seen on a second part of the canals. Of course, you can also is applied, the following multiple 20 finds the catalyst material 10 'or 10 "in predetermined catalyst reaction within the electrode carrier. th areas only applied to the carrier or Scaffolding instead: first acts the kaialytic nickel-be arranged, if this is special locally layer 10 'at a temperature of 500 ° C or conditional or other reasons may be desirable more on the methane flowing through or the like, should.

1 sheet of drawings

Claims (2)

1 2 of the layers are suitable and the claims in particular: for the production of pores contained therein as a result of the sintering process over small and large 1. Fuel electrode construction with a po surfaces are suitable. red, electronically non-conductive carrier, the 5 Preferred materials of the above-described with a large number of uniform, adjacent, character are fire-ceramic and high-temperature largely parallel channels, the tur-ceramic materials, which are at least 50% perpendicular to one on one side, preferably larger, Have open surface and run porous electrode layer, characterized by honeycomb-like cells of preferably porous that the electrode layer has a walled construction, the wall thickness facing the electrolyte and that means about a few tens / <m, the wall porosity about 40 ⁰ Zi) for introducing one Hydrocarbon fuel and the transverse cell expansion about 0.125 mm are provided in the channels and that is. the walls of the channels with at least one object of the invention is to provide one Catalyst for converting the hydrocarbon 15 new and improved fuel electrode structure, substance covered in carbon dioxide and hydrogen which corresponds to the principles discussed above, are. however, it also offers other advantages, e.g. B., 2. Electrode assembly according to claim 1, characterized in that the carrier itself has an inlet for fuel -. characterized in that when using or oxidizing agents in a fuel cell, wherein Methane as fuel the catalyst from so this structure the application of a multiple adjacent nickel and iron oxide catalyst process within the electrode - There are layers, with the nickel permitting itself to the framework or its surroundings and insvon the side facing away from the electrode. especially for working with high temperatures suitable is.
35 According to the invention, the object is achieved suggested that the electrode layer the Electrolyte facing and that means for introducing a hydrocarbon fuel into the The invention relates to a fuel electrode channels are provided and that the walls of the Structure with a porous, electronically non-conductive channels with at least one catalyst for the carrier, which are provided with a large number of uniform, largely parallel channels and are covered with a large number of uniform, largely parallel channels that convert the hydrocarbon into carbon dioxide. * which is perpendicular to one on one side. The invention is described below with reference to th porous electrode layer run. management examples in connection with the drawing In the patent application P 14 21372.0 a 35 is described in more detail. It shows novel electrode structure proposed, which the F i g. 1 a schematic perspective view, practical manufacture and use of thinner the the introduction of fuel into a fuel electron conductor Allows layers that would otherwise not have a cell with an electrode structure according to the invention are self-supporting and in some cases, however, for the sake of clarity, without a cata- are difficult to manufacture in a porous state, as shown in FIG. 40 lysator coating, and
it for certain uses for electrodes, F i g. Figure 2 is a similar view of a modified one including fuel cells. Embodiment suitable for multiple catalyst according to the design described there is suitable. such electron-conducting layers on electron- In F i g. 1 is a thin electron conductive porous insulating, preferably porous, material, what 45 layer or surface 1 shown, made of sintered e.g. can be achieved by sintering, being platinized nickel, platinized silver, nickel, silver the non-conductive support may consist of a variety of or magnetite, etc. and the after uniform, adjacent, largely parallel sintering on the surface of a row or multiple channels is provided. Sintering techniques to form a number of uniform, adjacent, largely and bonding of porous conductive channels 10 made of electron-insulating material parallel to the carrier 50 layers are, for example, in "Treatise on Powder Material, for example the one described above Metallurgy «by C. Goetzel, Interscience Publishers, porous fire-ceramic material, adheres and from 1949, volume 1, chap. 14, 15. With which this is worn. The term "electron insulator" used here. The cell walls 10 are porous, which is caused by the In addition, both materials that no 55 puncturing is illustrated in order to introduce Show electron conductivity, such as B. use of fuel through the pores in the thin borrowed insulators made of glass, ceramic, etc., as well as electrode surface 1, z. B. in the electrolyte ion-conducting solid substances such as ion exchangers, a fuel cell or a similar chamber, referred to in "Ion Exchange Resine" by Robert as bounded by a second similar porous Kunin, Second Edition, 1958, John WiIy & Sons, 60 Electrode 1 '. The Dar Inc, New York, chap. 5 and 11, further discussed inlet 4 extends through a cell. sealing top wall, being the side edges As set out in the cited application, the cells leave open to allow fuel into which has become porous found that the sintering of thin metal walls with at least one catalyst bc- or the like. Electron-conducting layers on such electrically-layered (not shown in FIG. 1) channels 10 Electron-insulating fabrics to allow sturdy electrodes- in the direction of the ranks. The carrier 10 arrangements that are extremely good in terms of its properties just mentioned Carrying is not a self-supporting clektroncnleiten- thus both as part of the :: admission to the wide-