CN105032364A - Method using fast-growing wood to manufacture carbon dioxide adsorbing material - Google Patents
Method using fast-growing wood to manufacture carbon dioxide adsorbing material Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a method using fast-growing wood to manufacture a carbon dioxide adsorbing material. The method comprises the following steps: (1) grinding fast-growing wood such as artificially-planted poplar, eucalyptus, and the like, into particles with a size of 30 to 50 meshes; (2) processing the particles by a sodium hydroxide solution; (3) precipitating a cellulase preparation solution; (4) carrying out an enzyme treatment; (5) carrying out centrifugation to remove water; (6) preparing nano cellulose alcogel particles; (7) preparing aminated nano cellulose particles; (8) preparing aminated nano cellulose aerogel particles namely the carbon dioxide adsorbing material. The aminated nano cellulose aerosol particles have the following characteristics: (1) BET surface area is 400 to 600 m2/g; (2) the average aperture is 15 to 25 nm; (3) the carbon dioxide adsorption performance is 1.5 to 2.5 mmol/g at a temperature of 25 DEG C; (4) after the adsorption of carbon dioxide is saturated, the third regeneration rate of aerogel is more than 90%.
Description
Technical field
What the present invention relates to is a kind of method that fast growing wood manufactures carbon dioxide absorbing material, belongs to timber processing and composite wooden material field.
Background technology
The fast growing wood such as Plantation Poplar, eucalyptus is the primary raw material of the composite wooden materials such as China's wood-based plate, and current product is single, added value is lower, larger to the influence on development of fast growing wood manufacture field.For this reason, exploitation fast growing wood New Machining Technology is further needed, the new material of research high added value.At present, along with going from bad to worse and the scarcity of fossil energy of environment, the trapping of carbon dioxide becomes current study hotspot with being separated, be base material by the nano-cellulose that fast growing wood is processed, again by surface-functionalized process, prepare high performance carbon dioxide absorbing material, for trapping the carbon dioxide reclaimed in flue gas, natural gas and biogas, the process technology level of fast growing wood can be improved, develop the new material of high added value.
Summary of the invention
What the present invention proposed is a kind of method that fast growing wood manufactures carbon dioxide absorbing material, its objective is and utilizes fast growing wood to process high value added product, improve the value of fast growing wood; In addition, utilize reproducible string for base material, manufacture carbon dioxide absorbing material, reduce the dependence to non-renewable material, make carbon dioxide adsorption process become greenization more, be conducive to the popularization of carbon dioxide adsorption technique, reduce the discharge of carbon dioxide.
Technical solution of the present invention: the method manufacturing carbon dioxide absorbing material with fast growing wood, comprises following processing step:
(1) fast growing wood such as Plantation Poplar, eucalyptus is crushed to 30-50 order;
(2) under 90 DEG C of conditions, with 8-12%(w/w) sodium hydroxide solution treatment step (1) in the plant fiber material 6-9 hour that pulverized, filter, washing, obtains solid fiber.Then, then under 160-180 DEG C of condition, with 2-6%(w/w) these solid fibers of sodium sulfite solution process 0.5-2 hour, filter, washing, obtains white fiber element;
(3) at 4 DEG C of temperature, adopt 20-40% ammonium chloride saturated solution, precipitated cellulose enzymes soln, 3-6 hour is left standstill at 4 DEG C, then 4 DEG C, centrifugation under 8000rpm condition, get its supernatant, and wherein ammonium sulfate saturation degree will be adjusted to 60%, be positioned over hold over night in 4 DEG C of refrigerators, 4 DEG C, centrifugation under 8000rpm condition, remove supernatant, and with distilled water washing gained sediment three times, wash with the isopyknic deionized water of sediment, the sediment obtained is endo cellulase at every turn;
(4) under temperature 50 C, pH=4.8, the cellulose in the endo cellulase treatment step (2) obtained with separation in step (3), slurry solid-to-liquid ratio 1:30-60, endo cellulase consumption is 30-45IU/g paper pulp fiber, processing time 20-24 hour.After ferment treatment, filter, and spend deionized water three times, cumulative volume when each deionized water consumption equals ferment treatment;
(5) under room temperature, gained cellulose in high-pressure homogeneous process treatment step (4), during process, in slurry, content of cellulose is 1-2% (w/w), operation pressure is 800-100bar, circulation 3-5 time, then 4 DEG C, under 11000rpm condition, a certain amount of moisture of centrifugal removing;
(6) get part nano-cellulose in step (5), being configured to concentration is 3-5% nano-cellulose suspension, and further ultrasonic disperse becomes colloidal.Being instilled concentration is in the divalent salt solutions of 0.20-0.50mol/L, leave standstill 8-12 hour, obtain the almost spherical granular nanometer cellulose aquagel that diameter is 4-8mm, filter, be placed in respectively double nano-cellulose hydrogel volume 25%, 50%, 95% ethanolic solution 12-24 hour, filter obtain nano-cellulose alcogel particle;
(7) the nano-cellulose alcogel particle of gained in step (6) is mixed mutually with the ethanolic solution of amino containing silane, in the withstand voltage water heating kettle reactor being placed in rotation, carry out modified-reaction.Reaction condition: reaction temperature 120 DEG C, is incubated 10-16 hour, the concentration 2-8% of amino containing silane in the ethanolic solution of amino containing silane at such a temperature, and the volume of the ethanolic solution of amino containing silane is 1-3 times of nano-cellulose alcogel volume, and rotary speed is 1-4rpm.After having reacted, promptly with running water cooling reactor half an hour, then filter, obtain aminated nanofiber crude granule;
(8) the aminated nanofiber crude granule just obtained in step (7) puts into supercritical extraction reactor, and at 35-60 DEG C, pressure is under 35-65MPa, and extraction 20-60 minute, obtaining aminated nano-cellulose aerogel particle is carbon dioxide absorbing material.
Beneficial effect of the present invention, the aminated nano-cellulose aerogel particle utilizing the present invention to produce has following characteristic:
1) BET surface area 400-600m
2/ g,
2) average pore size is 15-25nm,
3) 25 DEG C time carbon dioxide adsorption capacity be 1.5-2.5mmol/g;
4) carbon dioxide adsorption saturated after, 3 regeneration rates of this aeroge are all greater than 90%.
Detailed description of the invention
Manufacture the method for carbon dioxide absorbing material with fast growing wood, comprise following processing step:
(1) fast growing wood such as Plantation Poplar, eucalyptus is crushed to 30-50 order;
(2) under 90 DEG C of conditions, with 8-12%(w/w) sodium hydroxide solution treatment step (1) in the plant fiber material 6-9 hour that pulverized, filter, washing, obtains solid fiber.Then, then under 160-180 DEG C of condition, with 2-6%(w/w) these solid fibers of sodium sulfite solution process 0.5-2 hour, filter, washing, obtains white fiber element;
(3) at 4 DEG C of temperature, adopt 20-40% ammonium chloride saturated solution, precipitated cellulose enzymes soln, 3-6 hour is left standstill at 4 DEG C, then 4 DEG C, centrifugation under 8000rpm condition, get its supernatant, and wherein ammonium sulfate saturation degree will be adjusted to 60%, be positioned over hold over night in 4 DEG C of refrigerators, 4 DEG C, centrifugation under 8000rpm condition, remove supernatant, and with distilled water washing gained sediment three times, wash with the isopyknic deionized water of sediment, the sediment obtained is endo cellulase at every turn;
(4) under temperature 50 C, pH=4.8, the cellulose in the endo cellulase treatment step (2) obtained with separation in step (3), slurry solid-to-liquid ratio 1:30-60, endo cellulase consumption is 30-45IU/g paper pulp fiber, processing time 20-24 hour.After ferment treatment, filter, and spend deionized water three times, cumulative volume when each deionized water consumption equals ferment treatment;
(5) under room temperature, gained cellulose in high-pressure homogeneous process treatment step (4), during process, in slurry, content of cellulose is 1-2% (w/w), operation pressure is 800-100bar, circulation 3-5 time, then 4 DEG C, under 11000rpm condition, a certain amount of moisture of centrifugal removing;
(6) get part nano-cellulose in step (5), being configured to concentration is 3-5% nano-cellulose suspension, and further ultrasonic disperse becomes colloidal.Being instilled concentration is in the divalent salt solutions of 0.20-0.50mol/L, leave standstill 8-12 hour, obtain the almost spherical granular nanometer cellulose aquagel that diameter is 4-8mm, filter, be placed in respectively double nano-cellulose hydrogel volume 25%, 50%, 95% ethanolic solution 12-24 hour, filter obtain nano-cellulose alcogel particle;
(7) the nano-cellulose alcogel particle of gained in step (6) is mixed mutually with the ethanolic solution of amino containing silane, in the withstand voltage water heating kettle reactor being placed in rotation, carry out modified-reaction.Reaction condition: reaction temperature 120 DEG C, is incubated 10-16 hour, the concentration 2-8% of amino containing silane in the ethanolic solution of amino containing silane at such a temperature, and the volume of the ethanolic solution of amino containing silane is 1-3 times of nano-cellulose alcogel volume, and rotary speed is 1-4rpm.After having reacted, promptly with running water cooling reactor half an hour, then filter, obtain aminated nanofiber crude granule;
(8) the aminated nanofiber crude granule just obtained in step (7) puts into supercritical extraction reactor, and at 35-60 DEG C, pressure is under 35-65MPa, and extraction 20-60 minute, obtaining aminated nano-cellulose aerogel particle is carbon dioxide absorbing material.
Embodiment 1
Manufacture the method for carbon dioxide absorbing material with fast growing wood, comprise following processing step:
(1) fast growing wood such as Plantation Poplar, eucalyptus is crushed to 30 orders;
(2) under 90 DEG C of conditions, with 8%(w/w) sodium hydroxide solution treatment step (1) in the plant fiber material pulverized 6 hours, filter, washing, obtains solid fiber.Then, then under 160 DEG C of conditions, with 2%(w/w) these solid fibers of sodium sulfite solution process 0.5 hour, filter, washing, obtains white fiber element;
(3) at 4 DEG C of temperature, adopt 20% ammonium chloride saturated solution, precipitated cellulose enzymes soln, 3 hours are left standstill at 4 DEG C, then 4 DEG C, centrifugation under 8000rpm condition, get its supernatant, and wherein ammonium sulfate saturation degree will be adjusted to 60%, be positioned over hold over night in 4 DEG C of refrigerators, 4 DEG C, centrifugation under 8000rpm condition, remove supernatant, and with distilled water washing gained sediment three times, wash with the isopyknic deionized water of sediment, the sediment obtained is endo cellulase at every turn;
(4) under temperature 50 C, pH=4.8, the cellulose in the endo cellulase treatment step (2) obtained with separation in step (3), slurry solid-to-liquid ratio 1:30, endo cellulase consumption is 30-45IU/g paper pulp fiber, 20 hours processing times.After ferment treatment, filter, and spend deionized water three times, cumulative volume when each deionized water consumption equals ferment treatment;
(5) under room temperature, gained cellulose in high-pressure homogeneous process treatment step (4), during process, in slurry, content of cellulose is 1% (w/w), operation pressure is 800bar, circulation 3-5 time, then 4 DEG C, under 11000rpm condition, a certain amount of moisture of centrifugal removing;
(6) get part nano-cellulose in step (5), being configured to concentration is 3-5% nano-cellulose suspension, and further ultrasonic disperse becomes colloidal.Being instilled concentration is in the divalent salt solutions of 0.20mol/L, leave standstill 8 hours, obtain the almost spherical granular nanometer cellulose aquagel that diameter is 4mm, filter, be placed in respectively double nano-cellulose hydrogel volume 25%, 50%, 95% ethanolic solution 12 hours, filter and obtain nano-cellulose alcogel particle;
(7) the nano-cellulose alcogel particle of gained in step (6) is mixed mutually with the ethanolic solution of amino containing silane, in the withstand voltage water heating kettle reactor being placed in rotation, carry out modified-reaction.Reaction condition: reaction temperature 120 DEG C, is incubated 10 hours, the concentration 2-8% of amino containing silane in the ethanolic solution of amino containing silane at such a temperature, and the volume of the ethanolic solution of amino containing silane is 1-3 times of nano-cellulose alcogel volume, and rotary speed is 1rpm.After having reacted, promptly with running water cooling reactor half an hour, then filter, obtain aminated nanofiber crude granule;
(8) the aminated nanofiber crude granule just obtained in step (7) puts into supercritical extraction reactor, and at 35 DEG C, pressure is under 35MPa, extracts 20 minutes, and obtaining aminated nano-cellulose aerogel particle is carbon dioxide absorbing material.
Embodiment 2
Manufacture the method for carbon dioxide absorbing material with fast growing wood, comprise following processing step:
(1) fast growing wood such as Plantation Poplar, eucalyptus is crushed to 50 orders;
(2) under 90 DEG C of conditions, with 12%(w/w) sodium hydroxide solution treatment step (1) in the plant fiber material pulverized 9 hours, filter, washing, obtains solid fiber.Then, then under 180 DEG C of conditions, with 6%(w/w) these solid fibers of sodium sulfite solution process 2 hours, filter, washing, obtains white fiber element;
(3) at 4 DEG C of temperature, adopt 40% ammonium chloride saturated solution, precipitated cellulose enzymes soln, 6 hours are left standstill at 4 DEG C, then 4 DEG C, centrifugation under 8000rpm condition, get its supernatant, and wherein ammonium sulfate saturation degree will be adjusted to 60%, be positioned over hold over night in 4 DEG C of refrigerators, 4 DEG C, centrifugation under 8000rpm condition, remove supernatant, and with distilled water washing gained sediment three times, wash with the isopyknic deionized water of sediment, the sediment obtained is endo cellulase at every turn;
(4) under temperature 50 C, pH=4.8, the cellulose in the endo cellulase treatment step (2) obtained with separation in step (3), slurry solid-to-liquid ratio 1:60, endo cellulase consumption is 45IU/g paper pulp fiber, 24 hours processing times.After ferment treatment, filter, and spend deionized water three times, cumulative volume when each deionized water consumption equals ferment treatment;
(5) under room temperature, gained cellulose in high-pressure homogeneous process treatment step (4), during process, in slurry, content of cellulose is 2% (w/w), operation pressure is 100bar, circulate 5 times, then 4 DEG C, under 11000rpm condition, a certain amount of moisture of centrifugal removing;
(6) get part nano-cellulose in step (5), being configured to concentration is 3-5% nano-cellulose suspension, and further ultrasonic disperse becomes colloidal.Being instilled concentration is in the divalent salt solutions of 0.50mol/L, leave standstill 12 hours, obtain the almost spherical granular nanometer cellulose aquagel that diameter is 8mm, filter, be placed in respectively double nano-cellulose hydrogel volume 25%, 50%, 95% ethanolic solution 24 hours, filter and obtain nano-cellulose alcogel particle;
(7) the nano-cellulose alcogel particle of gained in step (6) is mixed mutually with the ethanolic solution of amino containing silane, in the withstand voltage water heating kettle reactor being placed in rotation, carry out modified-reaction.Reaction condition: reaction temperature 120 DEG C, is incubated 16 hours, the concentration 8% of amino containing silane in the ethanolic solution of amino containing silane at such a temperature, and the volume of the ethanolic solution of amino containing silane is 1-3 times of nano-cellulose alcogel volume, and rotary speed is 4rpm.After having reacted, promptly with running water cooling reactor half an hour, then filter, obtain aminated nanofiber crude granule;
(8) the aminated nanofiber crude granule just obtained in step (7) puts into supercritical extraction reactor, and at 60 DEG C, pressure is under 65MPa, extracts 60 minutes, and obtaining aminated nano-cellulose aerogel particle is carbon dioxide absorbing material.
Embodiment 3
Manufacture the method for carbon dioxide absorbing material with fast growing wood, comprise following processing step:
(1) fast growing wood such as Plantation Poplar, eucalyptus is crushed to 40 orders;
(2) under 90 DEG C of conditions, with 10%(w/w) sodium hydroxide solution treatment step (1) in the plant fiber material pulverized 7 hours, filter, washing, obtains solid fiber.Then, then under 170 DEG C of conditions, with 4%(w/w) these solid fibers of sodium sulfite solution process 1.5 hours, filter, washing, obtains white fiber element;
(3) at 4 DEG C of temperature, adopt 20-40% ammonium chloride saturated solution, precipitated cellulose enzymes soln, 4 hours are left standstill at 4 DEG C, then 4 DEG C, centrifugation under 8000rpm condition, get its supernatant, and wherein ammonium sulfate saturation degree will be adjusted to 60%, be positioned over hold over night in 4 DEG C of refrigerators, 4 DEG C, centrifugation under 8000rpm condition, remove supernatant, and with distilled water washing gained sediment three times, wash with the isopyknic deionized water of sediment, the sediment obtained is endo cellulase at every turn;
(4) under temperature 50 C, pH=4.8, the cellulose in the endo cellulase treatment step (2) obtained with separation in step (3), slurry solid-to-liquid ratio 1:45, endo cellulase consumption is 35IU/g paper pulp fiber, 22 hours processing times.After ferment treatment, filter, and spend deionized water three times, cumulative volume when each deionized water consumption equals ferment treatment;
(5) under room temperature, gained cellulose in high-pressure homogeneous process treatment step (4), during process, in slurry, content of cellulose is 1-2% (w/w), operation pressure is 900bar, circulate 4 times, then 4 DEG C, under 11000rpm condition, a certain amount of moisture of centrifugal removing;
(6) get part nano-cellulose in step (5), being configured to concentration is 4% nano-cellulose suspension, and further ultrasonic disperse becomes colloidal.Being instilled concentration is in the divalent salt solutions of 0.30mol/L, leave standstill 10 hours, obtain the almost spherical granular nanometer cellulose aquagel that diameter is 6mm, filter, be placed in respectively double nano-cellulose hydrogel volume 25%, 50%, 95% ethanolic solution 10 hours, filter and obtain nano-cellulose alcogel particle;
(7) the nano-cellulose alcogel particle of gained in step (6) is mixed mutually with the ethanolic solution of amino containing silane, in the withstand voltage water heating kettle reactor being placed in rotation, carry out modified-reaction.Reaction condition: reaction temperature 120 DEG C, is incubated 13 hours, the concentration 5% of amino containing silane in the ethanolic solution of amino containing silane at such a temperature, and the volume of the ethanolic solution of amino containing silane is 1-3 times of nano-cellulose alcogel volume, and rotary speed is 3rpm.After having reacted, promptly with running water cooling reactor half an hour, then filter, obtain aminated nanofiber crude granule;
(8) the aminated nanofiber crude granule just obtained in step (7) puts into supercritical extraction reactor, and at 40 DEG C, pressure is under 50MPa, extracts 30 minutes, and obtaining aminated nano-cellulose aerogel particle is carbon dioxide absorbing material.
Claims (8)
1. manufacture the method for carbon dioxide absorbing material with fast growing wood, it is characterized in that the method comprises following processing step:
(1) fast growing wood such as Plantation Poplar, eucalyptus is crushed to 30-50 order;
(2) sodium hydroxide solution process;
(3) precipitated cellulose enzymes soln;
(4) ferment treatment;
(5) centrifugal removing moisture;
(6) nano-cellulose alcogel particle is prepared;
(7) aminated nanofiber crude granule is prepared;
(8) preparing aminated nano-cellulose aerogel particle is carbon dioxide absorbing material.
2. fast growing wood according to claim 1 manufactures the method for carbon dioxide absorbing material, it is characterized in that described processing step (2) sodium hydroxide solution process: under 90 DEG C of conditions, with 8-12%(w/w) sodium hydroxide solution treatment step (1) in the plant fiber material 6-9 hour that pulverized, filter, washing, obtain solid fiber, then, again under 160-180 DEG C of condition, with 2-6%(w/w) these solid fibers of sodium sulfite solution process 0.5-2 hour, filter, washing, obtains white fiber element.
3. fast growing wood according to claim 1 manufactures the method for carbon dioxide absorbing material, it is characterized in that described processing step (3) precipitated cellulose enzymes soln: at 4 DEG C of temperature, adopt 20-40% ammonium chloride saturated solution, precipitated cellulose enzymes soln, 3-6 hour is left standstill at 4 DEG C, then at 4 DEG C, centrifugation under 8000rpm condition, get its supernatant, and wherein ammonium sulfate saturation degree will be adjusted to 60%, be positioned over hold over night in 4 DEG C of refrigerators, at 4 DEG C, centrifugation under 8000rpm condition, remove supernatant, and wash gained sediment three times with distilled water, wash with the isopyknic deionized water of sediment at every turn, the sediment obtained is endo cellulase.
4. fast growing wood according to claim 1 manufactures the method for carbon dioxide absorbing material, it is characterized in that described processing step (4) ferment treatment: under temperature 50 C, pH=4.8, cellulose in the endo cellulase treatment step (2) obtained with separation in step (3), slurry solid-to-liquid ratio 1:30-60, endo cellulase consumption is 30-45IU/g paper pulp fiber, processing time 20-24 hour, after ferment treatment, filter, and spend deionized water three times, cumulative volume when each deionized water consumption equals ferment treatment.
5. fast growing wood according to claim 1 manufactures the method for carbon dioxide absorbing material, it is characterized in that the described centrifugal removing moisture of processing step (5): under room temperature, gained cellulose in high-pressure homogeneous process treatment step (4), during process, in slurry, content of cellulose is 1-2% (w/w), operation pressure is 800-100bar, circulation 3-5 time, then 4 DEG C, under 11000rpm condition, a certain amount of moisture of centrifugal removing.
6. fast growing wood according to claim 1 manufactures the method for carbon dioxide absorbing material, it is characterized in that described processing step (6) prepares nano-cellulose alcogel particle: get part nano-cellulose in step (5), being configured to concentration is 3-5% (w/w) nano-cellulose suspension, and further ultrasonic disperse becomes colloidal; Being instilled concentration is in the divalent salt solutions of 0.20-0.50mol/L, leave standstill 8-12 hour, obtain the almost spherical granular nanometer cellulose aquagel that diameter is 4-8mm, filter, be placed in respectively double nano-cellulose hydrogel volume 25%, 50%, 95% ethanolic solution 12-24 hour, filter obtain nano-cellulose alcogel particle.
7. fast growing wood according to claim 1 manufactures the method for carbon dioxide absorbing material, it is characterized in that described processing step (7) prepares aminated nanofiber crude granule: mixed mutually with the ethanolic solution of amino containing silane by the nano-cellulose alcogel particle of gained in step (6), modified-reaction is carried out in the withstand voltage water heating kettle reactor being placed in rotation, reaction condition: reaction temperature 120 DEG C, be incubated 10-16 hour at such a temperature, the concentration 2-8% of amino containing silane in the ethanolic solution of amino containing silane, the volume of the ethanolic solution of amino containing silane is 1-3 times of nano-cellulose alcogel volume, rotary speed is 1-4rpm, after having reacted, promptly with running water cooling reactor half an hour, then filter, obtain aminated nanofiber crude granule.
8. fast growing wood according to claim 1 manufactures the method for carbon dioxide absorbing material, it is characterized in that described processing step (8) prepares aminated nano-cellulose aerogel particle is carbon dioxide absorbing material: the aminated nanofiber crude granule obtained in step (7) is put into supercritical extraction reactor, at 35-60 DEG C, pressure is under 35-65MPa, extraction 20-60 minute, obtaining aminated nano-cellulose aerogel particle is carbon dioxide absorbing material.
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| CN115382508A (en) * | 2021-11-16 | 2022-11-25 | 淮阴师范学院 | Preparation method of green and efficient low-partial-pressure carbon dioxide adsorbing material |
| CN116199930A (en) * | 2023-03-09 | 2023-06-02 | 国科温州研究院(温州生物材料与工程研究所) | Functionalized cellulose porous aerogel material and preparation method and application thereof |
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| CN105032364B (en) | 2018-01-05 |
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