PROCESS FOR REUSE OF PLASTIC THROUGH THE CONVERSION TO CARBON NANOMATERIALS
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IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
C01B-032/162
B09B-003/00
B01J-031/22
출원번호
16435475
(2019-06-08)
공개번호
20190375639
(2019-12-12)
발명자
/ 주소
ORBAEK WHITE, Alvin
HEDAYATI, Ali
출원인 / 주소
ORBAEK WHITE, Alvin
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
The present disclosure provides methods for the conversion of a solution or suspension of polymers, plastics, and other carbon-containing waste materials in the presence of a metal containing catalyst into carbon nanotubes. The method includes steps of mixing the polymer and metallic catalyst in a s
The present disclosure provides methods for the conversion of a solution or suspension of polymers, plastics, and other carbon-containing waste materials in the presence of a metal containing catalyst into carbon nanotubes. The method includes steps of mixing the polymer and metallic catalyst in a suitable solvent and injecting the mixture into a heated zone of a chemical vapor deposition (CVD) reactor to produce carbon nanotubes (CNTs). Advantages of the present disclosure include ease of use, the potential use of a wide range of plastics that cannot be recycled or upcycled by traditional methods, and the ability to use waste hydrocarbon solvents to dissolve the plastic, or to use as a carbon source.
대표청구항▼
1. A method of converting waste plastic to carbon nanotubes, comprising: mixing a carbon-containing material and a metallic catalyst precursor with a solvent to form a mixture;injecting the mixture into a carrier gas stream and into a heated reaction vessel comprising a plurality of heating zones;he
1. A method of converting waste plastic to carbon nanotubes, comprising: mixing a carbon-containing material and a metallic catalyst precursor with a solvent to form a mixture;injecting the mixture into a carrier gas stream and into a heated reaction vessel comprising a plurality of heating zones;heating the mixture at a first temperature of between about 100° C. and about 1000° C.;heating the mixture at a second temperature of between about 400° C. and about 1000° C. to facilitate growth of carbon nanotubes; andremoving the carbon nanotubes from the reaction vessel. 2. The method of claim 1, wherein the removing the carbon nanotubes from the reaction vessel is performed concurrently with the growth of the carbon nanotubes. 3. The method of claim 1, further comprising: cooling the reaction vessel to about room temperature; andceasing flow of the carrier gas stream prior to removal of the carbon nanotubes from the reaction vessel. 4. The method of claim 1, wherein the carrier gas comprises hydrogen. 5. The method of claim 4, wherein the carrier gas further comprises one or more of argon, helium, or nitrogen. 6. The method of claim 5, wherein a flow rate of the carrier gas is between about 0.001 L/min and about 500 L/min. 7. The method of claim 1, wherein the metallic catalyst precursor is soluble in the solvent. 8. The method of claim 7, wherein the metallic catalyst precursor contains one or more of an iron containing material, a nickel containing material, a cobalt containing material, a molybdenum containing material, a copper containing material, a zinc containing material, a gallium containing material, or a ruthenium containing material. 9. The method of claim 8, wherein the metallic catalyst precursor is ferrocene. 10. The method of claim 8, where a concentration of the metallic catalyst precursor in the mixture is between about 0.01 to about 50 weight percent. 11. The method of claim 1, wherein the carbon containing material is a waste plastic selected from the group consisting of polyvinyl chloride, polystyrene, bisphenol A resins, low density polyethylene, polypropylene, polymer resins, polyurethane, olefins, polyolefins, or elastomers. 12. The method of claim 11, wherein a concentration of the waste plastic in the mixture is between about 0.10 to about 10 weight percent. 13. The method of claim 1, wherein the solvent disperses or dissolves the carbon-containing material. 14. The method of claim 13, wherein the solvent is selected from the group consisting of toluene, xylene, benzene, acetone, dimethyl sulfoxide (DMSO), dichloromethane, chloroform, isopropyl alcohol, benzyl alcohol, ethanol, bioethanol, methanol, biofuels, dimethylformamide (DMF), decaline, p-xylene, m-cresol, o-cresol, nitrobenzene, phenol, or chlorophenol. 15. The method of claim 13, wherein the solvent is a waste contaminated solvent. 16. The method of claim 15, wherein the solvent is a hydrocarbon containing material. 17. The method of claim 1, wherein the solvent, the carbon-containing material, and the metallic catalyst precursor mixture is injected into the reaction vessel at a rate of between about 0.001 mL/min to about 100 mL/min. 18. A method of converting waste plastic to carbon nanotubes, comprising: mixing waste plastic and ferrocene with a solvent to form a mixture;injecting the mixture into a carrier gas stream and into a quartz tube comprising a first heating zone and a second heating zone;heating the mixture at a first temperature of between about 100° C. and about 1000° C. in the first heating zone;heating the mixture at a second temperature of between about 400° C. and about 1000° C. in the second heating zone to facilitate growth of carbon nanotubes; andremoving the carbon nanotubes from the reaction vessel. 19. The method of claim 18, wherein the waste plastic selected from the group consisting of polyvinyl chloride, polystyrene, bisphenol A resins, low density polyethylene, polypropylene, polymer resins, polyurethane, olefins, polyolefins, or elastomers. 20. A method of converting waste plastic to carbon nanotubes, comprising: mixing carbon-containing material and a metallic catalyst precursor with toluene to form a mixture;injecting the mixture into a carrier gas stream and into a reaction vessel comprising a first heating zone and a second heating zone, the first heating zone and the second heating zones disposed adjacent to one another along a length of a quartz tube;heating the mixture at a first temperature of between about 100° C. and about 1000° C. in the first heating zone;heating the mixture at a second temperature of between about 400° C. and about 1000° C. in the second heating zone to facilitate growth of carbon nanotubes on the quartz tube within the second heating zone; andremoving the carbon nanotubes from the reaction vessel.
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