SORBENT COMPOSITIONS, SORBENT ARTICLES, METHODS FOR PREPARING SORBENT ARTICLES, AND METHODS FOR CAPTURING TARGET GASES USING THE SORBENT ARTICLES
First Claim
1. An article for capturing or separating a target gas from a gas stream, the article comprising a porous substrate impregnated or coated with a sorbent composition, the sorbent composition comprising a polyamine and a coexistent polymer chemically bonded to the polyamine, wherein the coexistent polymer is chosen from polyurethanes, polyolefin-acrylic acid copolymers, and combinations thereof.
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Accused Products
Abstract
Articles for capturing or separating a target gas from a gas stream may include a porous substrate such as a flexible sheet or mat, or a rigid ceramic monolith impregnated or coated with a sorbent composition. The sorbent composition may include a polyamine and a coexistent polymer chemically bonded to the polyamine. The polyamine may include a polyethylenimine. The coexistent polymer may include a polyurethane, a polyolefin-acrylic acid copolymer, or a combination thereof. The sorbent composition may be substantially less water-insoluble than compositions containing only a polyamine and may have high durability and good adsorption capacity for acidic target gases such as carbon dioxide. Methods for preparing the articles using aqueous polymer solutions are provided. Methods for capturing or separating target gases using the articles are provided.
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Citations
20 Claims
- 1. An article for capturing or separating a target gas from a gas stream, the article comprising a porous substrate impregnated or coated with a sorbent composition, the sorbent composition comprising a polyamine and a coexistent polymer chemically bonded to the polyamine, wherein the coexistent polymer is chosen from polyurethanes, polyolefin-acrylic acid copolymers, and combinations thereof.
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12. A method for preparing an article for capturing or separating a target gas from a gas stream, the method comprising:
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applying an aqueous solution to a first porous substrate, the aqueous solution comprising a polyamine and a coexistent polymer chosen from polyurethanes, polyolefin-acrylic acid copolymers, and combinations thereof; and drying the first porous substrate having the aqueous solution thereon to form a sorbent composition impregnated in or coated on the first porous substrate that is a reaction product of the polyamine and the coexistent polymer. - View Dependent Claims (13, 14, 15, 16)
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17. A method for capturing or separating a target gas from a gas stream, the method comprising:
flowing the gas stream through a porous substrate of an article, the porous substrate being impregnated or coated with a sorbent composition comprising a polyamine and a coexistent polymer chosen from polyurethanes, polyolefin-acrylic acid copolymers, and combinations thereof. - View Dependent Claims (18, 19, 20)
Specification