Provided are an apparatus for separating and collecting carbon dioxide and a method of separating carbon dioxide, and more particularly, an apparatus and method of selectively separating carbon dioxide from a byproduct gas using a difference in negative pressure and a difference in carbon dioxide co
Provided are an apparatus for separating and collecting carbon dioxide and a method of separating carbon dioxide, and more particularly, an apparatus and method of selectively separating carbon dioxide from a byproduct gas using a difference in negative pressure and a difference in carbon dioxide concentration between the inside of a separator, which is made of a ceramic-coated porous silicone membrane and in which the byproduct gas flows, and the outside of the separator in which carbon dioxide is collected.
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1. An apparatus for separating carbon dioxide, the apparatus comprising: a byproduct gas storage tank which stores a byproduct gas generated by an environmental treatment facility and containing methane and carbon dioxide;a byproduct gas inlet through which the byproduct gas is fed from the byproduc
1. An apparatus for separating carbon dioxide, the apparatus comprising: a byproduct gas storage tank which stores a byproduct gas generated by an environmental treatment facility and containing methane and carbon dioxide;a byproduct gas inlet through which the byproduct gas is fed from the byproduct gas storage tank and a byproduct gas outlet through which a methane-containing byproduct gas obtained by separating carbon dioxide from the fed byproduct gas is discharged;a separation container which comprises a separator made of a porous silicone membrane that separates carbon dioxide from the fed byproduct gas;an outlet which is formed in the separation container to discharge carbon dioxide separated from the porous silicone membrane;a carbon dioxide storage tank which receives and stores the separated carbon dioxide; anda remaining byproduct gas storage tank which stores the methane-containing byproduct gas obtained by separating carbon dioxide from the fed byproduct gas,wherein the porous silicone membrane comprises a first surface and a second surface opposing to the first surface and the first surface and the second surface of the porous silicone membrane are coated with ceramic. 2. The apparatus of claim 1, wherein the separation container is maintained at a pressure of 0 to 4 kgf/cm2 at room temperature. 3. The apparatus of claim 1, wherein the separator made of the porous silicone membrane is in the form of a vertical sheet, a horizontal sheet, or a tube. 4. The apparatus of claim 1, wherein the separator is one of a plurality of separators installed in the separation container. 5. The apparatus of claim 1, wherein the porous silicone membrane is formed by mixing a silicone rubber raw material, ceramic powder and a curing agent, extruding the mixture, and curing the extruded mixture at a temperature of 80 to 300° C. 6. The apparatus of claim 5, wherein the ceramic powder is added in an amount of 0.001 to 10% by weight based on the weight of the silicone rubber raw material. 7. The apparatus of claim 3, wherein a support and a mesh are installed between the separation membranes, which are in the form of the vertical sheet and the horizontal sheet and made of porous silicone, to maintain a predetermined gap between the separation membranes. 8. The apparatus at claim 7, wherein the support or the mesh is made of a metal to apply an electric field. 9. The apparatus of claim 8, wherein the electric field supplies any one or both of a direct current and an alternating current. 10. The apparatus of claim 9, wherein a voltage of the direct current range from 0.01 to 50 kV, a frequency of the alternating current ranges from 1 Hz to 1 MHz, and a voltage of the alternating current ranges from 0.01 to 50 kV. 11. The apparatus of claim 1, wherein a pump is used at the byproduct gas outlet to discharge the methane-containing byproduct gas without carbon dioxide. 12. The apparatus of claim 1, wherein a sound wave generator is installed around the porous silicone membrane to vibrate the porous silicone membrane. 13. A carbon dioxide separation membrane comprising: a separation membrane which is made of porous silicone; anda coated layer which is obtained by coating nanoceramic powder on the porous silicone separation membrane. 14. The membrane of claim 13, wherein the nanoceramic powder is any one or a combination of two or more of Fe-based oxide, Pd-based oxide, Ti-based oxide, and Al-based oxide. 15. The membrane claim 13, wherein the separation membrane made of porous silicone has a diameter of 2 to 50 mm and a thickness of 0.1 to 2 mm. 16. The membrane of claim 13, wherein pores formed in the separation membrane made porous silicone have a diameter of 0.32 to 0.35 nm. 17. The membrane of claim 13, wherein the nanoceramic powder has an average grain size of 1 to 100 nm. 18. The membrane of claim 13, wherein the ceramic-coated layer has a thickness of 2 nm to 100 μm. 19. A method of separating carbon dioxide from a byproduct gas using an apparatus for separating carbon dioxide which comprises the carbon dioxide separation membrane of claim 13. 20. The method of claim 19, wherein a difference in pressure between the inside and outside of a separator which is made of the porous silicone membrane is less than 4 kgf/cm2.
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이 특허에 인용된 특허 (8)
Tandon, Kunj; Rapol, Umakant; Barik, Ullash Kumar; Vetrivel, Rajappan, Composite membrane for separation of carbon dioxide.
Kraus Menahem A. (11651 Summerhaven Dr. St. Louis MO 63146) Murphy Milton K. (1036 Tompkins St. Charles MO 63301), Polyphosphazene membrane separation of polar from non-polar fluids.
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