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CN-116851401-B - Underground sealing, converting and reutilizing method for carbon-containing resource

CN116851401BCN 116851401 BCN116851401 BCN 116851401BCN-116851401-B

Abstract

The invention belongs to the fields of carbon-containing resource utilization and carbon dioxide emission reduction, and discloses a method for underground sealing, conversion and reutilization of carbon-containing resources, which takes solid carbon-containing resources as an example and comprises the following steps of (1) converting the solid carbon-containing resources into carbon-containing liquid; the method comprises the steps of (1) detecting polymerization characteristics and/or reaction characteristics, if the detection result does not meet the preset requirement, preparing the carbon-containing liquid, and (3) pouring the carbon-containing liquid into an underground sealing point which is positioned at the position of more than or equal to 800 m underground, so that the carbon-containing liquid is solidified or reacted at the underground sealing point. The invention utilizes modulation to modulate the polymerization characteristic and/or reaction characteristic of the carbon-containing liquid by improving the overall flow design of the sealing and converting method, and then fills the carbon-containing liquid into the underground sealing point, so that the carbon-containing liquid is solidified or reacted under the pressure condition of the underground sealing point, thereby realizing sealing and converting. The invention fills the carbon-containing resource into the deep underground, and the sealing durability is long.

Inventors

  • WANG YI
  • LI JIASHUO
  • JIANG LONG
  • XU JUN
  • XU KAI
  • DENG WEI
  • WANG XUEPENG
  • XIONG YIMIN
  • SHEN QIHUI
  • XIANG JUN
  • HU SONG
  • SU SHENG
  • HU XUN

Assignees

  • 华中科技大学

Dates

Publication Date
20260505
Application Date
20230613

Claims (17)

  1. 1. The underground sealing and converting method for carbon-containing resource is characterized by comprising the following steps of: (1) Converting the solid carbonaceous resource into a carbonaceous liquid by pretreatment; (2) Detecting the reaction characteristic of the carbon-containing liquid, wherein the reaction characteristic is used as a basis for regulating the reaction process; if the detection result meets the preset requirement, carrying out the step (3) on the carbon-containing liquid; If the detection result does not meet the preset requirement, preparing the carbon-containing liquid by adopting a mode of mixing different carbon-containing liquids and/or adding additives into the carbon-containing liquid according to the detection result, and performing a step (3) on the prepared carbon-containing liquid, wherein the additives are at least one of chelating agents, polymerization inhibitors and catalysts; (3) Pouring the carbon-containing liquid into an underground sealing point, wherein the underground sealing point is positioned at the position of more than or equal to 800 meters underground, so that the carbon-containing liquid reacts at the underground sealing point, and the pouring mode is that the carbon-containing liquid and CO 2 are poured cooperatively; The corresponding pouring mode of the reaction is that carbon-containing liquid and CO 2 are poured in a coordinated manner, and in the reaction process, under the pressure condition of an underground sealing point, the carbon-containing liquid and CO 2 react to generate a combustible gas product, wherein the pressure condition of the underground sealing point is more than or equal to 5MPa; in the step (1), the solid carbonaceous resource is selected from biomass, carbonaceous solid non-biomass waste; wherein the biomass comprises at least one of agricultural waste, forestry residues, algae; the carbonaceous solid non-biomass waste is a carbonaceous solid industrial waste.
  2. 2. The underground sealing and converting method for carbon-containing resource is characterized by comprising the following steps of: (i) Detecting the reaction characteristics of the carbon-containing liquid by taking liquid carbon-containing resources as the carbon-containing liquid, wherein the reaction characteristics are used as the basis for regulating the reaction process; if the detection result meets the preset requirement, carrying out step (ii) on the carbon-containing liquid; If the detection result does not meet the preset requirement, preparing the carbon-containing liquid by adopting a mode of mixing different carbon-containing liquids and/or adding additives into the carbon-containing liquid according to the detection result, and performing a step (ii) on the prepared carbon-containing liquid, wherein the additives are at least one of chelating agents, polymerization inhibitors and catalysts; (ii) Pouring the carbon-containing liquid into an underground sealing point, wherein the underground sealing point is positioned at the position of more than or equal to 800 meters underground, so that the carbon-containing liquid reacts at the underground sealing point, the pouring mode is that the carbon-containing liquid and CO 2 are poured in a coordinated manner, and an anti-coking measure is adopted at the same time during pouring; The corresponding pouring mode of the reaction is that carbon-containing liquid and CO 2 are poured in a coordinated manner, and in the reaction process, under the pressure condition of an underground sealing point, the carbon-containing liquid and CO 2 react to generate a combustible gas product, wherein the pressure condition of the underground sealing point is more than or equal to 5MPa; In the step (i), the liquid carbonaceous resource is a liquefied product of biomass and/or carbonaceous solid non-biomass waste or a dispersion dispersed in a liquid; wherein the biomass comprises at least one of agricultural waste, forestry residues, algae; the carbonaceous solid non-biomass waste is a carbonaceous solid industrial waste.
  3. 3. The method for the underground sequestration and conversion of carbon-containing resources according to claim 1 or 2, characterized in that in step (3) or in step (ii) the reaction takes place in particular with carbon-containing liquids under underground pressure conditions, CO 2 present as supercritical or liquid.
  4. 4. The method for underground sequestration and conversion of carbon-containing resources according to claim 1 or 2, characterized in that it further comprises a subsequent reuse step, wherein the reuse after the reaction is to collect the combustible gas generated by the reaction out of the ground for reuse.
  5. 5. The method for underground sequestration and conversion of carbon-containing resources according to claim 2, wherein in step (i), the liquid carbon-containing resource is at least one of biodiesel, ethanol, solutions containing microorganisms or algae, dispersions of biomass particles in water or other liquids.
  6. 6. The method for underground sequestration and conversion of carbon-containing resources according to claim 2, wherein in step (i), the liquid carbon-containing resource is bio-oil.
  7. 7. The method for underground sequestration and conversion of carbon-containing resources according to claim 2, wherein in step (i), the liquid carbon-containing resources are biomass fermented ethanol.
  8. 8. The method for underground sequestration and conversion of carbon-containing resources according to claim 2, characterized in that the liquid carbon-containing resources are dispersions of biochar particles in water or other liquids.
  9. 9. The method for underground sequestration and conversion of carbon-containing resources according to claim 1 or 2, characterized in that the biomass comprises at least one of wood chips, straw, bagasse, animal waste.
  10. 10. The method for underground sequestration and conversion of carbon-containing resources according to claim 1 or 2, characterized in that the carbon-containing solid non-biomass waste comprises at least one of carbon-containing slag, waste tires.
  11. 11. The method for underground sequestration and conversion of carbon-containing resources according to claim 1 or 2, characterized in that the carbon-containing solid non-biomass waste is an automotive breaking residue.
  12. 12. The method for underground sequestration and conversion of carbon-containing resources according to claim 1 or 2, wherein in step (3) or step (ii), the anti-coking measure includes at least one of casing circulating water cooling, phase-change heat-dissipation cooling and polymerization inhibitor addition to avoid coking of carbon-containing liquid in the perfusion tube.
  13. 13. The method of claim 1 or 2, wherein in step (3) or step (ii), the underground sequestration site comprises at least one of a abandoned mine, a natural cave, a difficult-to-mine seam, or a geotechnical void; and the underground sealing point is positioned at the position more than or equal to 800 meters underground and is lower than the position more than or equal to 50 meters of the underground aquifer.
  14. 14. The method for underground sequestration and conversion of carbon-containing resources according to claim 1 or 2, wherein in step (3) or step (ii), the underground sequestration point is a salt cavern; and the underground sealing point is positioned at the position more than or equal to 800 meters underground and is lower than the position more than or equal to 50 meters of the underground aquifer.
  15. 15. The method for underground sequestration and conversion of carbon-containing resources according to claim 1 or 2, wherein in step (2) or step (i), the predetermined requirement is predetermined according to the geological characteristics of the underground sequestration site.
  16. 16. The method for underground sequestration and conversion of carbon-containing resources according to claim 15, wherein the predetermined requirements are predetermined according to the geological characteristics of the underground sequestration site and the reuse target.
  17. 17. The method for underground sequestration and conversion of carbon-containing resources according to claim 1, wherein in step (1), the pretreatment is by at least one of pyrolysis, hydrothermal liquefaction, fermentation, liquid blending.

Description

Underground sealing, converting and reutilizing method for carbon-containing resource Technical Field The invention belongs to the fields of carbon-containing resource utilization and carbon dioxide emission reduction, and in particular relates to a method for underground sealing, conversion and reutilization of carbon-containing resources. Background Biomass is a carbonaceous resource that replaces fossil fuels, re-releasing CO 2 fixed by photosynthesis from formation to utilization life cycle, and despite a zero carbon emission process, does not directly reduce CO 2 emissions. Biomass residues are buried into soil, so that biomass carbon remains in soil layers for a long time in a humus form, however, due to shallow buried depths (the average thickness of earth soil circles is about 5 meters, the carbon seals are often positioned in the ground by 10-20 meters), open-cut forms are generally adopted for landfill, solid wastes are generally used for landfill, the durability of the treatment mode is still to be researched, and in addition, limited land resources are not beneficial to large-scale popularization of the technology. The carbon-containing resources such as agricultural and forestry waste, industrial waste and the like in China have large reserves, but are various, low in energy density and difficult to scale utilization, and the carbon-containing waste and the industrial waste have important significance if long-term storage and effective utilization of different carbon-containing resources can be realized, and meanwhile, the emission of CO 2 is greatly reduced. Disclosure of Invention In view of the above-mentioned drawbacks or improvement demands of the prior art, an object of the present invention is to provide a method for underground sequestration, conversion and reuse of carbon-containing resources, wherein the overall flow design of the sequestration and conversion method is improved, the polymerization characteristics and/or reaction characteristics of the carbon-containing liquid are modulated by modulation (in the modulation process, the requirements on the polymerization characteristics and/or reaction characteristics of the carbon-containing liquid can be preset according to the geological characteristics of the underground sequestration point (and the reuse target can also be considered at the same time)), and then the carbon-containing liquid is infused into the underground sequestration point, so that the carbon-containing liquid is solidified or reacted under the pressure condition of the underground sequestration point, thereby realizing sequestration and conversion. The invention fills the carbon-containing resource into the deep underground, has long sealing durability, and can be reused at a proper time according to the actual situation. In order to achieve the above object, according to one aspect of the present invention, there is provided a method for underground sequestration and conversion of a carbonaceous resource, the method being directed to a solid carbonaceous resource and comprising the steps of: (1) Converting the solid carbonaceous resource into a carbonaceous liquid by pretreatment; (2) Detecting the polymerization characteristic and/or the reaction characteristic of the carbon-containing liquid, wherein the polymerization characteristic is used as a basis for regulating the curing process; if the detection result meets the preset requirement, carrying out the step (3) on the carbon-containing liquid; If the detection result does not meet the preset requirement, preparing the carbon-containing liquid by adopting a mode of mixing different carbon-containing liquids and/or adding additives into the carbon-containing liquid according to the detection result, and performing a step (3) on the prepared carbon-containing liquid, wherein the additives are at least one of chelating agents, polymerization inhibitors and catalysts; (3) Pouring the carbon-containing liquid into an underground sealing point, wherein the underground sealing point is positioned at the position of more than or equal to 800 meters below the ground, so that the carbon-containing liquid is solidified or reacted at the underground sealing point, and the pouring mode is that the carbon-containing liquid is independently poured or the carbon-containing liquid and CO 2 are poured in a synergistic way; in the curing process, the carbon-containing liquid forms a carbon-containing curing layer under the pressure condition of an underground sealing point to realize the curing sealing of carbon-containing resources; The corresponding pouring mode of the reaction is that the carbonaceous liquid and CO 2 are poured in a coordinated manner, in the reaction process, under the condition of the pressure of the underground sealing point, the carbonaceous liquid and CO 2 react to generate a combustible gas product, or the corresponding pouring mode of the reaction is that the carbonaceous liquid is poured independe