Method for post-treating catalyst coated membranes
AssigneeUop LLC
InventorsXueliang Dong, Chunqing Liu, Howie Q. Tran
Life of this patent
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Abstract
High efficiency CCM post-treatment methods are described. A multilayer CCM mesh cage has multiple shelves. Each CCM is placed in between one or two pieces of mesh and loaded into the multilayer CCM mesh cage, which is made of mesh so that the acid or base can contact the CCMs. Multiple CCM cages can be soaked in an acid tank at the same time. A circulation pump can be included in the acid or base tank to circulate the acid or base during the CCM post-treatment. Large batch of CCMs can be treated simultaneously.
Claims19
A method of post-treating a catalyst coated membrane comprising:
- providing a catalyst coated membrane;
- placing a layer of mesh on a side of the catalyst coated membrane;
- soaking at least two sets of the catalyst coated membrane and the mesh layer in an acid or base bath forming at least two sets of an acid or base treated catalyst coated membrane and the mesh layer;
- removing the at least two sets of the catalyst coated membrane and the mesh layer from the acid or base bath;
- and
- rinsing the at least two sets of the acid or base treated catalyst coated membrane and the mesh layer with high purity water,
- wherein the at least two sets of the catalyst coated membrane and the mesh layer are stacked before soaking the at least two sets of the catalyst coated membrane and the mesh layer in an acid or base bath.
A method of post-treating a catalyst coated membrane comprising:
- providing a catalyst coated membrane;
- placing a layer of mesh on both sides of the catalyst coated membrane forming a mesh covered catalyst coated membrane;
- providing a multilayer mesh cage;
- placing a plurality of the mesh covered catalyst coated membranes in the multilayer mesh cage;
- placing the multilayer mesh cage containing the mesh covered catalyst coated membrane in an acid or base bath and soaking the mesh covered catalyst coated membrane forming a plurality of mesh covered acid or base treated catalyst coated membranes;
- removing the plurality of mesh covered acid or base treated catalyst coated membranes from the acid or base bath;
- rinsing the plurality of mesh covered acid or base treated catalyst coated membranes with high purity water;
- and
- drying the plurality of mesh covered acid or base treated catalyst coated membranes.
Dependencies are inferred from the claim text.