Systems and methods for processing coal for use in a direct air capture system
Embodiments discloses herein relate to methods of processing coal. A method to process coal includes subjecting raw coal to a liquefaction process effective to form a liquid pitch resin and subjecting the liquid pitch resin to a filtration process. The method further includes subjecting the liquid pitch resin to a low crystallinity spinning process to form a raw fiber. The raw fiber is then further subjected to a stabilization process configured to oxygen cross-link the fiber to form a stabilized fiber and then subjecting the stabilized fiber to a carbonization process to form a low thermal conductivity carbon fiber.
1. A method of manufacturing an electro-swing reactive adsorption (ESA) system, the method comprising:
forming a polyanthraquinone-activated carbon composite negative electrode;
forming a ferrocene-activated carbon composite anode electrode; and
positioning one or more separator membranes between the negative electrode and the anode electrode.
2. The method of claim 1 , wherein the polyanthraquinone-activated carbon composite negative electrode includes a low thermal conductivity carbon fiber and the ferrocene-activated carbon composite anode electrode includes the low thermal conductivity carbon fiber.
3. The method of claim 1 , further comprising forming the low thermal conductivity carbon fiber by:
subjecting raw coal to a liquefaction process to form a liquid pitch resin;
subjecting the liquid pitch resin to a filtration process;
subjecting the liquid pitch resin to a low crystallinity spinning process to form raw fiber;
subjecting the raw fiber to a stabilization process configured to oxygen cross-link the fibers; and
subjecting the stabilized fiber to a carbonization process to form the low thermal conductivity carbon fiber.
4. The method of claim 1 , further comprising forming the activated carbon by:
providing an amount of coal;
beneficiating the amount of coal to remove impurities therefrom;
processing at least some of the beneficiated amount of coal effective to produce an amount of solid char; and
treating at least some of the solid char effective to produce an amount of the activated carbon.
5. The method of claim 4 , wherein the solid char includes a hydrogen to carbon ratio of from about 0.05 to about 0.65.
6. The method of claim 4 , wherein treating at least some of the solid char includes at least one of a physical activation or a chemical activation.
7. The method of claim 6 , wherein the physical activation includes heating the char in an inert atmosphere.
8. The method of claim 6 , wherein the physical activation includes heating the char in an oxidizing atmosphere.
9. The method of claim 6 , wherein chemical activation includes impregnating the char with one or more chemicals.
10. An electro-swing reactive adsorption (ESA) system, the system comprising:
a polyanthraquinone-activated carbon composite negative electrode;
a ferrocene-activated carbon composite anode electrode; and
one or more separator membranes positioned between the negative electrode and the anode electrode.
11. The system of claim 10 , wherein the polyanthraquinone-activated carbon composite negative electrode includes a low thermal conductivity carbon fiber and the ferrocene-activated carbon composite anode electrode includes the low-conductivity carbon fiber.
12. The system of claim 11 , wherein the low thermal conductivity carbon fiber is a coal-based low conductivity carbon fiber.
13. The system of claim 10 , wherein the activated carbon is a coal-based activated carbon.
14. The system of claim 10 , wherein the ESA system is included in a direct air capture (DAC) system.
15. The system of claim 11 , wherein the low thermal conductivity carbon fiber is formed by:
subjecting a liquid pitch resin to a low crystallinity spinning process to form a raw fiber;
subjecting the raw fiber to a stabilization process configured to oxygen cross-link the fiber to form a stabilized fiber; and
subjecting the stabilized fiber to a carbonization process.