CN115945186A - Preparation of lignin-based mesoporous carbon/magnesium oxide composite material and application of lignin-based mesoporous carbon/magnesium oxide composite material in microwave-assisted catalysis of glucose isomerization - Google Patents
Preparation of lignin-based mesoporous carbon/magnesium oxide composite material and application of lignin-based mesoporous carbon/magnesium oxide composite material in microwave-assisted catalysis of glucose isomerization Download PDFInfo
- Publication number
- CN115945186A CN115945186A CN202211225339.2A CN202211225339A CN115945186A CN 115945186 A CN115945186 A CN 115945186A CN 202211225339 A CN202211225339 A CN 202211225339A CN 115945186 A CN115945186 A CN 115945186A
- Authority
- CN
- China
- Prior art keywords
- lignin
- mesoporous carbon
- composite material
- magnesium oxide
- based mesoporous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920005610 lignin Polymers 0.000 title claims abstract description 54
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000002131 composite material Substances 0.000 title claims abstract description 44
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 40
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title claims abstract description 39
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 title claims abstract description 29
- 239000008103 glucose Substances 0.000 title claims abstract description 29
- 238000006317 isomerization reaction Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000006555 catalytic reaction Methods 0.000 title abstract description 9
- 229930091371 Fructose Natural products 0.000 claims abstract description 33
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 claims abstract description 33
- 239000005715 Fructose Substances 0.000 claims abstract description 33
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 12
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000003197 catalytic effect Effects 0.000 claims abstract description 9
- 239000003513 alkali Substances 0.000 claims abstract description 6
- 239000001103 potassium chloride Substances 0.000 claims abstract description 6
- 235000011164 potassium chloride Nutrition 0.000 claims abstract description 6
- 239000007864 aqueous solution Substances 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 238000001035 drying Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000003763 carbonization Methods 0.000 claims description 9
- 239000012153 distilled water Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000003575 carbonaceous material Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000010000 carbonizing Methods 0.000 claims description 5
- 238000007598 dipping method Methods 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 239000011541 reaction mixture Substances 0.000 claims description 5
- 238000005470 impregnation Methods 0.000 claims description 4
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 3
- 229910001414 potassium ion Inorganic materials 0.000 claims description 3
- 238000009656 pre-carbonization Methods 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 9
- 239000002585 base Substances 0.000 abstract description 8
- 239000002028 Biomass Substances 0.000 abstract description 5
- 239000007787 solid Substances 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 125000000524 functional group Chemical group 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 239000002105 nanoparticle Substances 0.000 abstract description 2
- 239000002243 precursor Substances 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 7
- 239000000969 carrier Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- NOEGNKMFWQHSLB-UHFFFAOYSA-N 5-hydroxymethylfurfural Chemical compound OCC1=CC=C(C=O)O1 NOEGNKMFWQHSLB-UHFFFAOYSA-N 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002638 heterogeneous catalyst Substances 0.000 description 2
- RJGBSYZFOCAGQY-UHFFFAOYSA-N hydroxymethylfurfural Natural products COC1=CC=C(C=O)O1 RJGBSYZFOCAGQY-UHFFFAOYSA-N 0.000 description 2
- 239000011968 lewis acid catalyst Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 239000002841 Lewis acid Substances 0.000 description 1
- 108700040099 Xylose isomerases Proteins 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000005815 base catalysis Methods 0.000 description 1
- 239000002551 biofuel Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 238000007210 heterogeneous catalysis Methods 0.000 description 1
- 238000007172 homogeneous catalysis Methods 0.000 description 1
- 239000002815 homogeneous catalyst Substances 0.000 description 1
- 239000013462 industrial intermediate Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 150000007517 lewis acids Chemical class 0.000 description 1
- 239000002029 lignocellulosic biomass Substances 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000696 nitrogen adsorption--desorption isotherm Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000009790 rate-determining step (RDS) Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a preparation method of a lignin-based mesoporous carbon/magnesium oxide composite material and application of the lignin-based mesoporous carbon/magnesium oxide composite material in microwave-assisted catalysis of glucose isomerization. The lignin-based mesoporous carbon/magnesium oxide composite material prepared by using alkali lignin as a carbon source, potassium chloride as a salt template and magnesium nitrate as a catalytic active site precursor has excellent structural characteristics such as a hierarchical porous structure, a high specific surface area, rich oxygen-containing functional groups and uniformly distributed magnesium oxide nanoparticles. In addition, the composite material is easy to recover, does not corrode equipment, is used as an environment-friendly solid base catalyst, can efficiently realize the isomerization of glucose in a short time by microwave assistance in an aqueous solution to prepare fructose, and has excellent catalytic performance. The novel heterogeneous solid base catalytic reaction system disclosed by the invention realizes the aim of preparing fructose by catalyzing glucose isomerization in an environment-friendly and efficient manner, and has a wide application prospect in the field of preparing high value-added chemicals from biomass.
Description
Technical Field
The invention relates to preparation and application of a carbon-based solid base catalyst, in particular to preparation of a lignin-based mesoporous carbon/magnesium oxide composite material and application of the lignin-based mesoporous carbon/magnesium oxide composite material in preparation of fructose by microwave-assisted catalysis of glucose isomerization in an aqueous solution.
Background
As the biomass resource is the only carbon-containing renewable energy on the earth, people pay more and more attention to the biomass resource for synthesizing sustainable chemicals and biofuels instead of the traditional fossil resource due to the advantages of abundant reserves, wide distribution, high cost benefit, environmental friendliness and the like. Glucose, one of the main monomers of lignocellulosic biomass, can be converted into a high value-added industrial intermediate chemical 5-hydroxymethylfurfural through a series of steps: (1) isomerization of glucose to fructose; and (2) dehydrating the fructose into 5-hydroxymethylfurfural. Among other things, isomerization of glucose to fructose serves as a rate limiting step, limiting the efficiency of conversion of glucose to value-added chemicals. Therefore, it is necessary and urgent to develop an efficient and sustainable isomerization catalyst.
Generally, isomerization of glucose to fructose is mainly achieved by two pathways, enzymatic and chemical catalysis. The enzyme catalysis (such as glucose isomerase) has the advantages of high selectivity, mild conditions and the like, and is widely applied to industrial production of fructose, but has the limitations of high cost, low efficiency, non-recycling and the like. Therefore, it is of great significance to develop a suitable chemical catalyst for efficiently isomerizing glucose to fructose. The chemical catalysis for preparing fructose by glucose isomerization mainly comprises homogeneous catalysis and heterogeneous catalysis. Homogeneous catalysts, while effective and having good catalytic performance during the reaction, have poor separability and recyclability that impair their competitiveness. In contrast, heterogeneous catalysts have the advantages of being environmentally friendly, cost effective, easy to regenerate and recover, and the like. Therefore, heterogeneous catalysts, including solid base or acid catalysts, are receiving increasing attention.
The isomerization of glucose to fructose may be by a Lewis acid or
Base catalysis. Recently, there have been reports
Base catalysts (e.g., 90 ℃ C. To 120 ℃ C.) can achieve efficient glucose isomerization at lower temperatures than Lewis acid catalysts (e.g., 120 ℃ C. To 160 ℃ C.). In addition, kinetics of glucose isomerizationStudy shows>
The activation energy of the base catalyst system is generally lower than that of the Lewis acid catalyst system. Therefore, the development of a high-performance and low-cost solid base catalyst applied to the reaction of preparing fructose by glucose isomerization is urgently needed.
In recent years, heterogeneous base catalysts containing metal oxides are prepared by impregnating carriers such as zeolite, silica, porous carbon and the like with metal precursors and then calcining the impregnated carriers, and are gradually applied to the reaction of preparing fructose through glucose isomerization. Among various carriers, porous carbon materials are favored because of their adjustable pore structure, high specific surface area, good stability, and other properties. On the basis of synthesizing lignin-based mesoporous carbon, the lignin-based mesoporous carbon/magnesium oxide composite material is prepared by subsequent impregnation and calcination and is applied to the reaction of preparing fructose by efficiently catalyzing glucose isomerization in aqueous solution with the assistance of microwave.
Disclosure of Invention
In view of the limitations of high cost, low efficiency, non-recycling and the like of the existing enzyme catalysis, the invention aims to provide a preparation method of a lignin-based mesoporous carbon/magnesium oxide composite material and application of the lignin-based mesoporous carbon/magnesium oxide composite material in a reaction for preparing fructose through glucose isomerization.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the method comprises the following steps: taking a certain amount of alkali lignin and potassium chloride, grinding, mixing, carbonizing, washing and drying to prepare the lignin-based mesoporous carbon material.
Step two: and (3) sequentially dipping, drying, carbonizing, washing and drying the lignin-based mesoporous carbon material obtained in the step one and magnesium nitrate to obtain the lignin-based mesoporous carbon/magnesium oxide composite material.
The mass ratio of the alkali lignin to the potassium chloride in the step one is 1: 0.25.
The carbonization procedure in the first step is performed in a nitrogen atmosphere, and can be divided into two stages, namely a pre-carbonization stage: heating from room temperature to 300 ℃ according to the heating rate of 3 ℃/min, and maintaining for 1h at 300 ℃; and (3) high-temperature carbonization: the temperature is raised from 300 ℃ to 700 ℃ according to the heating rate of 1 ℃/min and maintained at 700 ℃ for 2h.
The drying temperature in the first step is 105 ℃, and the drying time is 12 hours.
The washing process in the first step specifically comprises repeatedly washing with distilled water until no potassium ion can be detected in the filtrate.
And the mass ratio of the lignin-based mesoporous carbon material to the magnesium nitrate in the second step is 1: 0.2.
The dipping solution in the second step is a mixed solution of water and ethanol, the volume ratio is 1: 1, the volume ratio of the mass of the lignin-based mesoporous carbon to the mixed solution is 1 g: 15mL, the dipping temperature is room temperature, the stirring speed is 800rpm, and the dipping time is 12h.
The carbonization procedure in the second step is identical to that in the first step.
And the drying temperature in the second step is 65 ℃, and the drying time is 24 hours.
The invention also provides application of the lignin-based mesoporous carbon/magnesium oxide composite material in preparation of fructose by microwave-assisted catalytic glucose isomerization in an aqueous solution. The specific process is as follows: 0.5g of glucose, 0.1-0.35 g of lignin-based mesoporous carbon/magnesium oxide composite material and 15mL of distilled water are sequentially weighed and added into a 30mL microwave reaction tube, and then the reaction mixture is magnetically stirred at 100-130 ℃ to react for 5-25 min to prepare the fructose.
Compared with the prior art, the invention has the following advantages and effects: the lignin-based mesoporous carbon/magnesium oxide composite material prepared by the invention has excellent structural characteristics such as a hierarchical porous structure, a higher specific surface area, abundant oxygen-containing functional groups and uniformly distributed magnesium oxide nanoparticles. In addition, the composite material is easy to recover, has no corrosion to equipment, is green and environment-friendly, has low raw material cost and high catalytic activity, can realize the aim of preparing fructose by green and efficient catalytic isomerization of glucose in a water solution in a short time by microwave assistance, has excellent catalytic performance, and has wide application prospect in the field of preparing high value-added chemicals from biomass.
Drawings
FIG. 1 is an infrared spectrum of a lignin-based mesoporous carbon/magnesium oxide composite material obtained in example 1.
FIG. 2X-ray diffraction pattern of lignin-based mesoporous carbon/magnesium oxide composite obtained in example 1.
FIG. 3 is a scanning electron microscope image of the lignin-based mesoporous carbon/magnesium oxide composite material obtained in example 1.
FIG. 4A graph of the nitrogen adsorption-desorption isotherm and pore size distribution of the lignin-based mesoporous carbon/magnesium oxide composite obtained in example 1.
FIG. 5 is a graph of fructose yield versus reaction temperature in example 2.
FIG. 6 is a graph showing the relationship between fructose yield and reaction time in example 3.
Figure 7 graph of fructose yield versus catalyst loading in example 4.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with examples are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, and it is understood that these examples are provided solely for the purpose of illustrating the invention and are not intended to limit the scope of the invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined by the appended claims.
Example 1
2.0g of alkali lignin and 0.5g of potassium chloride were mixed uniformly by grinding, and then a two-stage carbonization process was performed in a tube furnace under an N2 atmosphere. In the pre-carbonization stage, the material is heated from room temperature to 300 ℃ at a heating rate of 3 ℃/min and kept at 300 ℃ for 1h. In the high-temperature carbonization stage, further heating was carried out from 300 ℃ to 700 ℃ at a temperature rise rate of 1 ℃/min, and then maintained at 700 ℃ for 2 hours. The obtained carbonized product was repeatedly washed with distilled water until no potassium ion was detected in the filtrate, and dried at 105 ℃ for 12 hours to prepare lignin-based mesoporous carbon.
1.0g of the lignin-based mesoporous carbon prepared above and 0.2g of magnesium nitrate were weighed into 15mL of a mixed solution of water and ethanol, magnetically stirred at 800rpm at room temperature for 12 hours, and then dried at 65 ℃ for 24 hours. And finally, carbonizing according to the same carbonization procedure to prepare the lignin-based mesoporous carbon/magnesium oxide composite material. As shown in fig. 1, the composite material possesses abundant oxygen-containing functional groups; as shown in fig. 2, the catalytically active component of the composite material was magnesium oxide; as shown in fig. 3, the composite material exhibits an irregular, rough, porous surface structure; as shown in fig. 4, a certain proportion of micropores and mesopores exist in the composite material structure.
Example 2
0.5g of glucose, 0.25g of the lignin-based mesoporous carbon/magnesium oxide composite material obtained in example 1 and 15mL of distilled water were sequentially weighed and added to a 30mL microwave reaction tube, and then, the reaction mixture was magnetically stirred at 100 ℃ to 130 ℃ for reaction for 5min. After the reaction, the microwave reaction tube was rapidly cooled to room temperature. And finally, detecting the content of the fructose by using a high performance liquid chromatograph, and further calculating to obtain the yield of the fructose. As shown in FIG. 5, the fructose yield was the highest when the reaction temperature was 130 ℃.
Example 3
0.5g of glucose, 0.25g of the lignin-based mesoporous carbon/magnesium oxide composite material obtained in example 1 and 15mL of distilled water were sequentially weighed and added to a 30mL microwave reaction tube, and then the reaction mixture was reacted at 130 ℃ for 5 to 25min with magnetic stirring. After the reaction, the microwave reaction tube was rapidly cooled to room temperature. And finally, detecting the content of the fructose by using a high performance liquid chromatograph, and further calculating to obtain the yield of the fructose. As shown in FIG. 5, fructose yield was highest when the reaction time was 5min.
Example 4
0.5g of glucose, 0.1 to 0.35g of the lignin-based mesoporous carbon/magnesium oxide composite material obtained in example 1 and 15mL of distilled water were sequentially weighed and added to a 30mL microwave reaction tube, and then, the reaction mixture was magnetically stirred at 130 ℃ for reaction for 5min. After the reaction, the microwave reaction tube was rapidly cooled to room temperature. And finally, detecting the content of the fructose by using a high performance liquid chromatograph, and further calculating to obtain the yield of the fructose. As shown in FIG. 5, when the amount of the lignin-based mesoporous carbon/magnesia composite material added was 0.25g, the catalyst loading was 0.5g -1 The fructose yield is highest.
The composite material has the advantages of easy recovery, no corrosion to equipment, low raw material cost, no pollution to the environment and high catalytic activity, can realize the aim of preparing fructose by catalyzing glucose isomerization in an environment-friendly and efficient manner, and has wide application prospect in the field of preparing high-added-value chemicals from biomass.
Finally, the foregoing description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The preparation method of the lignin-based mesoporous carbon/magnesium oxide composite material is characterized by comprising the following steps:
the method comprises the following steps: taking a certain amount of alkali lignin and potassium chloride, grinding, mixing, carbonizing, washing and drying to prepare the lignin-based mesoporous carbon material.
Step two: and (2) sequentially dipping, drying, carbonizing, washing and drying the lignin-based mesoporous carbon material obtained in the step one and magnesium nitrate to obtain the lignin-based mesoporous carbon/magnesium oxide composite material.
2. The preparation method of the lignin-based mesoporous carbon/magnesium oxide composite material according to claim 1, wherein the mass ratio of the alkali lignin to the potassium chloride in the first step is 1: 0.25.
3. The method for preparing lignin-based mesoporous carbon/magnesium oxide composite material according to claim 1, wherein the carbonization procedure in the first step is performed under nitrogen atmosphere, and can be divided into two stages, namely a pre-carbonization stage: heating from room temperature to 300 ℃ at a heating rate of 3 ℃/min, and maintaining at 300 ℃ for 1h; and (3) high-temperature carbonization: the temperature is raised from 300 ℃ to 700 ℃ according to the heating rate of 1 ℃/min and maintained at 700 ℃ for 2h.
4. The preparation method of the lignin-based mesoporous carbon/magnesium oxide composite material according to claim 1, wherein the drying temperature in the first step is 105 ℃ and the drying time is 12h.
5. The method for preparing the lignin-based mesoporous carbon/magnesium oxide composite material according to claim 1, wherein the washing process in the first step specifically comprises repeatedly rinsing with distilled water until no potassium ion is detected in the filtrate.
6. The method for preparing the lignin-based mesoporous carbon/magnesium oxide composite material according to claim 1, wherein the mass ratio of the lignin-based mesoporous carbon material to the magnesium nitrate in the second step is 1: 0.2.
7. The preparation method of the lignin-based mesoporous carbon/magnesium oxide composite material according to claim 1, wherein the impregnation solution in the second step is a mixed solution of water and ethanol, the volume ratio is 1: 1, the volume ratio of the mass of the lignin-based mesoporous carbon to the mixed solution is 1 g: 15mL, the impregnation temperature is room temperature, the stirring rate is 800rpm, and the impregnation time is 12h.
8. The method for preparing the lignin-based mesoporous carbon/magnesium oxide composite material according to claim 1, wherein the carbonization procedure in the second step is the same as that in the first step.
9. The preparation method of the lignin-based mesoporous carbon/magnesium oxide composite material according to claim 1, wherein the drying temperature in the second step is 65 ℃ and the drying time is 24h.
10. The application of the lignin-based mesoporous carbon/magnesium oxide composite material obtained by the preparation method in preparing fructose by microwave-assisted catalytic glucose isomerization in an aqueous solution according to claim 1 is characterized in that 0.5g of glucose, 0.1-0.35 g of the lignin-based mesoporous carbon/magnesium oxide composite material and 15mL of distilled water are sequentially weighed and added into a 30mL microwave reaction tube, and then the reaction mixture is magnetically stirred at 100-130 ℃ for reaction for 5-25 min to obtain the fructose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211225339.2A CN115945186A (en) | 2022-10-09 | 2022-10-09 | Preparation of lignin-based mesoporous carbon/magnesium oxide composite material and application of lignin-based mesoporous carbon/magnesium oxide composite material in microwave-assisted catalysis of glucose isomerization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211225339.2A CN115945186A (en) | 2022-10-09 | 2022-10-09 | Preparation of lignin-based mesoporous carbon/magnesium oxide composite material and application of lignin-based mesoporous carbon/magnesium oxide composite material in microwave-assisted catalysis of glucose isomerization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115945186A true CN115945186A (en) | 2023-04-11 |
Family
ID=87281249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211225339.2A Pending CN115945186A (en) | 2022-10-09 | 2022-10-09 | Preparation of lignin-based mesoporous carbon/magnesium oxide composite material and application of lignin-based mesoporous carbon/magnesium oxide composite material in microwave-assisted catalysis of glucose isomerization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115945186A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117299168A (en) * | 2023-08-14 | 2023-12-29 | 南开大学 | Method for preparing fructose by catalyzing glucose isomerization by utilizing nitrogen-doped carbon/magnesium oxide composite material |
-
2022
- 2022-10-09 CN CN202211225339.2A patent/CN115945186A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117299168A (en) * | 2023-08-14 | 2023-12-29 | 南开大学 | Method for preparing fructose by catalyzing glucose isomerization by utilizing nitrogen-doped carbon/magnesium oxide composite material |
| CN117299168B (en) * | 2023-08-14 | 2024-06-04 | 南开大学 | Method for preparing fructose by catalyzing glucose isomerization by utilizing nitrogen-doped carbon/magnesium oxide composite material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111617771B (en) | Preparation method of composite metal material catalyst and application of composite metal material catalyst in preparation of 5-HMF | |
| CN109289903B (en) | HZSM-5 supported Fe-Pd bimetallic catalyst for lignin depolymerization and preparation method thereof | |
| CN109012722B (en) | Cerium dioxide/titanium nitride nanotube taking Ce-MOF as precursor and preparation method and application thereof | |
| CN109346732B (en) | Nitrogen-doped porous carbon catalyst prepared from potatoes and preparation and application thereof | |
| CN107902654B (en) | Preparation method and application of coal tar pitch modified high-specific-surface porous carbon | |
| CN111389441A (en) | Catalyst for acetylene hydrochlorination reaction and preparation method and application thereof | |
| CN111151285B (en) | Nitrogen-doped porous carbon loaded ZnS nano composite material and preparation method and application thereof | |
| CN111250092B (en) | Preparation method and application of biomass honeycomb-shaped semicoke-loaded nickel-iron nanoparticle catalyst | |
| CN115945186A (en) | Preparation of lignin-based mesoporous carbon/magnesium oxide composite material and application of lignin-based mesoporous carbon/magnesium oxide composite material in microwave-assisted catalysis of glucose isomerization | |
| CN114538408A (en) | Method for preparing high electrocatalytic activity biochar through micro-aerobic pyrolysis | |
| CN115155616A (en) | Nano cellulose base porous solid acid catalyst and preparation method and application thereof | |
| CN112661729B (en) | Application of nitrate-assisted carbon catalytic system in preparation of 2, 5-furan dicarboxaldehyde by catalytic conversion of 5-hydroxymethylfurfural | |
| CN110639488A (en) | Application of biomass-based carbon material in electrochemical reduction of carbon dioxide | |
| CN110697708A (en) | Nitrogen-doped porous carbon material for lithium ion capacitor and efficient preparation method of low-temperature co-molten solvent activated biomass waste of nitrogen-doped porous carbon material | |
| CN112117466B (en) | Preparation method of nitrogen self-doped porous graphite carbon MFCs air cathode catalyst | |
| CN113289604A (en) | Preparation method and application of biomass coke-doped zirconium lanthanum magnesium aluminum solid acid catalyst | |
| CN112354563B (en) | Carbon catalyst loaded with phosphotungstic acid, and preparation method and application thereof | |
| CN114671432A (en) | Coal-based high-performance CO2Preparation method of activated carbon material for adsorption | |
| CN107973287B (en) | Mesoporous carbon material and preparation method thereof | |
| CN113522368A (en) | Fe and Co Co-doped sea urchin structure hollow carbon sphere electrocatalyst and preparation method thereof | |
| CN113351202A (en) | Titanium dioxide/ruthenium monoatomic noble metal nano catalytic material for degrading pollutants and preparation method thereof | |
| CN115974819B (en) | Method for preparing dimethyl furan by catalyzing 5-hydroxymethylfurfural through Cu-based catalyst | |
| LU501479B1 (en) | Preparation method of nitrogen self-doped porous graphite carbon MFCs air cathode catalyst | |
| CN111715278B (en) | Preparation method of Ni@ boron COFs catalyst for graphitizing carbon material | |
| CN110871109B (en) | Melamine resorcinol formaldehyde polymer modified graphite phase carbon nitride catalyst, preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |