Advanced porous carbon adsorbents for CO

1. A method of manufacturing a grooved carbonaceous monolith, said method comprising sculpting a carbonaceous monolith structure obtained by a process for manufacturing a porous carbonaceous monolith structure comprising the steps of:

i— introducing a precursor material comprising particles comprising a halogenated polymer having a melting point in a mold,

ii— forming a shaped body comprising aggregates of the particles of the precursor material, by concurrently applying to the precursor material a pressure P ranging from 10 to 300 bars when the halogenated polymer is a vinylidene chloride homopolymer and from 10 to 150 bars when the halogenated polymer differs from a vinylidene chloride homopolymer, and maintaining the precursor material at a temperature T 1 ranging from T 1,min =20° C. to T 1,max =T m −50° C. wherein T m is the melting point of the halogenated polymer, and,

iii— optionally cooling then demolding the shaped body,

iv— introducing the shaped body in a furnace,

v— causing the pyrolysis of the halogenated polymer in the furnace until the porous carbonaceous monolith structure is obtained,

wherein the carbonaceous monolith structure has a length to width and/or a length to thickness ratio of at least 4, and in that it presents a microporosity and at least one of an intra-particle macroporosity and an inter-particles macroporosity.

2. The method according to claim 1 , wherein the pressure P ranges from 10 to 150 bars whatever the halogenated polymer.

3. The method according to claim 1 wherein step v comprises:

v a — bringing the temperature of the shaped body up to a temperature T 2 strictly above T 2,min =T m −50° C. and strictly below T 2,max =T m ,

v b — maintaining the shaped body, at the temperature T 2 under inert gas flow, to cause the pyrolysis of the halogenated polymer and the formation of an infusible char,

v c — bringing the temperature of the infusible char up to a temperature T 3 strictly above T 3,min =T m and strictly below T 3,max =900° C.,

v d — maintaining the infusible char, at the temperature T 3 under inert gas flow, to cause the pyrolysis of the halogenated polymer, thereby obtaining the porous carbonaceous monolith structure.

4. The method according to claim 1 wherein the particles comprising the halogenated polymer have a mean diameter ranging from 145 μm to 400 μm.

5. A method of manufacturing a grooved carbonaceous monolith, said method comprising:

manufacturing a porous carbonaceous monolith structure by a process for manufacturing a porous carbonaceous monolith structure comprising the steps of:

i— introducing a precursor material comprising particles comprising a halogenated polymer having a melting point in a mold,

ii— forming a shaped body comprising aggregates of the particles of the precursor material, by concurrently applying to the precursor material a pressure P ranging from 10 to 300 bars when the halogenated polymer is a vinylidene chloride homopolymer and from 10 to 150 bars when the halogenated polymer differs from a vinylidene chloride homopolymer, and maintaining the precursor material at a temperature T 1 ranging from T 1,min =20° C. to T 1,max =T m −50° C. wherein T m is the melting point of the halogenated polymer, and,

iii— optionally cooling then demolding the shaped body,

iv— introducing the shaped body in a furnace,

v— causing the pyrolysis of the halogenated polymer in the furnace until the porous carbonaceous monolith structure is obtained, and

sculpting the so-manufactured porous carbonaceous monolith structure.

6. A grooved carbonaceous monolith obtained by the method of claim 1 , wherein the grooved carbonaceous monolith presents a microporosity and at least one of an intra-particle macroporosity and an inter-particles macroporosity and has canals wherein a gas can circulate.

7. A method of manufacturing a honeycomb porous carbonaceous structure presenting a microporosity and at least one of an intra-particle macroporosity and an inter-particles macroporosity, said method comprising:

manufacturing grooved carbonaceous monoliths by the method of claim 1 , and

assembling the so-manufactured grooved carbonaceous monoliths.

8. The method according to claim 7 wherein assembling the so-manufactured grooved carbonaceous monoliths is achieved by sticking with glue or by wrapping up with a polymer film.

9. A honeycomb porous carbonaceous structure obtained by the method of claim 7 , wherein the honeycomb porous carbonaceous structure presents a microporosity and at least one of an intra-particle macroporosity and an inter-particles macroporosity and has canals wherein a gas can circulate.

10. A method for extracting CO 2 from a gas composition by selectively adsorbing CO 2 gas using the grooved monolith according to claim 6 .

11. A method for extracting CO 2 from a gas composition by selectively adsorbing CO 2 gas using the honeycomb structure according to claim 9 .

12. The method according to claim 1 , wherein the pressure P ranges from 10 to 50 bars.