International Fuel Cells, LLC

United Technologies Corporation

The United States of America As Represented by the United States

Wolfgang M Vogel

Albert P Grasso

Charles Dominic Iacovangelo

William A Taylor

Johannes M Baris

Bryan F Dufner

Stanley W Smith

An apparatus 124 using an aqueous solution consisting essentially of water for forming a compound which retards the deposition of iron-based compounds is disclosed. The apparatus includes a chamber 138 for forming steam which is injected through a nozzle 148 into a chamber 136. The pH of the aqueous solution, which is acidic, is raised in the presence of oxygen to cause Fe++ to come out of solution as a precipitate and the oxygen level is lowered to limit the growth in size of the precipitate.

Apparatus and process for forming an aqueous solution

A fuel cell powerplant 10 having a flow path 20 for an aqueous solution and a method for operating the powerplant are disclosed. The aqueous solution includes water, iron based compounds, and ferric hydrous oxide of a character that retards the deposition of iron based compounds on the interior of the conduit.

Fuel cell power plants employing an aqueous solution

An apparatus, such as a fuel cell powerplant 10 or a boiler 168, having a flow path for an aqueous solution and a method for operating the apparatus are disclosed. The aqueous solution includes water, iron based compounds, and ferric hydrous oxide of a character that retards the deposition of iron based compounds on the interior of the conduit.

Apparatus employing an aqueous solution

A fuel cell powerplant 10 having a flow path 20 for an aqueous solution includes a device 18 for disposing in the solution ferric hydrous oxide of a character that retards the deposition of iron based compounds. The device is disposed within the powerplant and receives water from a conduit 42 which communicates with a component of the fuel cell powerplant, such as a fuel cell stack 12.

Fuel cell powerplant employing an aqueous solution

A molten carbonate fuel cell including a cathode electrode of electrically conducting or semiconducting lanthanum containing material and an electrolyte containing matrix of an electrically insulating lanthanum perovskite. In addition, in an embodiment where the cathode electrode is LaMnO.sub.3, the matrix may include LaAlO.sub.3 or a lithium containing material such as LiAlO.sub.2 or Li.sub.2 TiO.sub.3.

Molten carbonate fuel cell matrices

A sheet material, principally comprised of a polymer such as polytetrafluoroethylene, having characteristics which permit its use in a fuel cell electrode is formed from co-agglomerates of the polymer and a pore former. In a fuel cell electrode application, the polymer-pore former agglomerates are themselves caused to co-agglomerate with a catalyst, the resulting co-agglomerates are formed into a layer and the pore former is leached from the layer so as to produce a structure having gas channels only in the polymer portions thereof. Agglomeration of the pore former and polymer particles is permitted through first imparting a positive charge to the pore former particles. The gas permeable catalyst layer will be bonded to a support plate to define a fuel cell electrode.

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Glastonbury, CT, United States of America

Wolfgang M Vogel