Carbon dioxide gas absorbent and method of manufacturing the same
First Claim
1. A carbon dioxide gas absorbent comprising a porous body containing a lithium complex oxide, wherein the porous body includes pores having a pore diameter distribution such that main pores which consist of first pores with a diameter of 10 to 100 μ
- m and second pores with a diameter larger than 100 μ
m and 500 μ
m or smaller occupy 80 to 100%, third pores with a diameter smaller than 10 μ
m occupy 0 to 10% and fourth pores with a diameter larger than 500 μ
m occupy 0 to 10%, the main pores have a pore diameter distribution such that the first pores occupy 15 to 85% and second pores occupy 15 to 85%.
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Abstract
A carbon dioxide gas absorbent includes a porous body containing a lithium complex oxide. The porous body includes pores having a pore diameter distribution such that main pores which consist of first pores with a diameter of 10 to 100 μm and second pores with a diameter larger than 100 μm and 500 μm or smaller occupy 80 to 100%, third pores with a diameter smaller than 10 μm occupy 0 to 10% and fourth pores with a diameter larger than 500 μm occupy 0 to 10%, the main pores have a pore diameter distribution such that the first pores occupy 15 to 85% and second pores occupy 15 to 85%.
12 Citations
17 Claims
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1. A carbon dioxide gas absorbent comprising a porous body containing a lithium complex oxide, wherein the porous body includes pores having a pore diameter distribution such that main pores which consist of first pores with a diameter of 10 to 100 μ
- m and second pores with a diameter larger than 100 μ
m and 500 μ
m or smaller occupy 80 to 100%, third pores with a diameter smaller than 10 μ
m occupy 0 to 10% and fourth pores with a diameter larger than 500 μ
m occupy 0 to 10%, the main pores have a pore diameter distribution such that the first pores occupy 15 to 85% and second pores occupy 15 to 85%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- m and second pores with a diameter larger than 100 μ
-
11. A method of manufacturing a carbon dioxide gas absorbent, comprising:
-
preparing mixed powders by mixing lithium carbonate powders and silicon dioxide powders, the lithium carbonate powders have a grain size distribution such that main powders which consist of first powders with a diameter of 1 to 10 μ
m and second powders with a diameter larger than 10 μ
m and 300 μ
m or smaller occupy 80 to 100% by weight, third powders with a diameter smaller than 1 μ
m occupy 0 to 10% by weight and fourth powders with a diameter larger than 300 μ
m occupy 0 to 10% by weight, the main powders have a grain size distribution such that the first powders occupy 15 to 85% by weight and second powders occupy 15 to 85% by weight, the silicon dioxide powders have the same grain size distribution of the lithium carbonate powders;
molding the mixed powders; and
heating the molded body to 700°
C. or higher. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
Specification