Porous ceramic structure for carbon dioxide capture

Patent metadata

Field	Value
Publication number	US-2019389778-A1
Application number	US-201816482215-A
Country	US
Kind code	A1
Filing date	Feb 9, 2018
Priority date	Feb 9, 2017
Publication date	Dec 26, 2019
Grant date	—

Abstract

In one inventive concept, a product includes a three dimensional ceramic structure having an open cell structure with a plurality of pores, wherein the pores connect through the ceramic structure from one side of the ceramic structure to an opposite side of the ceramic structure.

First claim

What is claimed is:

1 . A product, comprising:
a three dimensional ceramic structure having an open cell structure with a plurality of pores, wherein the pores connect through the ceramic structure from one side of the ceramic structure to an opposite side of the ceramic structure.

2 . The product as recited in claim 1 , wherein the ceramic structure comprises 3 mol % Y 2 O 3 -doped ZrO 2 .

3 . The product as recited in claim 1 , wherein the ceramic structure comprises 8 mol % Y 2 O 3 -doped ZrO 2 .

4 . The product as recited in claim 1 , wherein an average diameter of the pores is in a range of about 50 nanometers to about 500 nanometers.

5 . The product as recited in claim 1 , wherein a density of the ceramic structure is in a range of about 20% to about 50% of a density of a solid ceramic form.

6 . The product as recited in claim 1 , comprising a molten hydroxide in the pores, the molten hydroxide being retained in the pores by capillary action.

7 . The product as recited in claim 6 , wherein the molten hydroxide is potassium hydroxide.

8 . The product as recited in claim 6 , wherein the molten hydroxide is a mixture comprising of lithium hydroxide, potassium hydroxide, and sodium hydroxide.

9 . The product as recited in claim 6 , wherein the ceramic structure has physical characteristics that enable the ceramic structure to retain the molten hydroxide in the pores after exposure to temperatures at about 400 degrees Celsius for at least 100 hours.

10 . The product as recited in claim 6 , wherein the ceramic structure has physical characteristics that enable the ceramic structure to retain the molten hydroxide in the pores after at least twenty heating and cooling cycles, wherein the heating is to about 400 degrees Celsius, wherein the cooling is to at least room temperature.

11 . A method of forming a porous ceramic structure, the method comprising:
combining metal oxide nanoparticles and a polymer to create a mixture; forming a body of the mixture; curing the formed body for crosslinking the polymer; heating the formed body to a first temperature for removing the polymer from the formed body; and heating the formed body to a second temperature for sintering the formed body of the metal oxide nanoparticles, thereby creating a porous ceramic structure having an open cell structure with a plurality of pores, wherein the pores connect through the ceramic structure from one side of the ceramic structure to an opposite side of the ceramic structure.

12 . The method as recited in claim 11 , wherein the mixture comprises metal oxide nanoparticles in a range of about 50 wt % to about 80 wt % of total mixture.

13 . The method as recited in claim 11 , wherein the metal oxide nanoparticles comprise 3 mol % Y 2 O 3 -doped ZrO 2 .

14 . The method as recited in claim 13 , wherein the 3 mol % Y 2 O 3 -doped ZrO 2 nanoparticles have an average diameter in a range of at least about 20 nanometers to about 600 nanometers.

15 . The method as recited in claim 11 , wherein the metal oxide nanoparticles comprise 8 mol % Y 2 O 3 -doped ZrO 2 .

16 . The method as recited in claim 15 , wherein the 8 mol % Y 2 O 3 -doped ZrO 2 nanoparticles have an average diameter in a range of at least about 20 nanometers to about 600 nanometers.

17 . The method of claim 11 , wherein the body of the mixture is formed by additive manufacturing of the mixture.

18 . The method of claim 17 , wherein the additive manufacturing is direct ink writing, wherein the ink is the mixture.

19 . The method of claim 17 , wherein the additive manufacturing is projection micro-stereolithography.

20 . The method as recited in claim 11 , further comprising filling the porous ceramic structure with an inorganic base material, wherein the inorganic base material includes a molten hydroxide.

21 . The method as recited in claim 20 , wherein the molten hydroxide includes molten potassium hydroxide.

22 . The method as recited in claim 20 , wherein the molten hydroxide is a mixture comprising of lithium hydroxide, potassium hydroxide, and sodium hydroxide.

Assignees

• L Livermore Nat Security Llc

Inventors

• Campbell Patrick
• Hernandez Maira Ceron
• Worsley Marcus A

Classifications

• C04B2235/3246

  Stabilised zirconias, e.g. YSZ or cerium stabilised zirconia · CPC title

• B01D2252/10

  Inorganic absorbents · CPC title

• C04B38/0058 Primary

  open porosity · CPC title

• C04B2235/77

  Density · CPC title

• C04B38/0054

  the pores being microsized or nanosized · CPC title