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Biomass-based porous carbon material, preparation method and application of biomass-based porous carbon material in separation of 1, 3-butadiene from C4 olefin mixture

A technology of porous carbon materials and biomass carbon sources, applied in the direction of carbon compounds, filtration separation, separation methods, etc., can solve the problems of production cost, adsorption capacity and dynamic separation performance that have not been completely resolved, and achieve low equipment investment, Good industrial application prospect, high selective separation effect

Inactive Publication Date: 2021-03-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, MOFs materials are facing structural stability and production cost problems, and it still takes a long time to achieve industrialization
[0006] At present, most of the research on the adsorption and separation of 1,3-butadiene is concentrated on zeolite and MOFs materials, and the problems of adsorption capacity and dynamic separation performance have not been completely resolved.
At the same time, there are few reports on the separation of carbon tetraolefins using carbon materials as adsorption materials.

Method used

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  • Biomass-based porous carbon material, preparation method and application of biomass-based porous carbon material in separation of 1, 3-butadiene from C4 olefin mixture
  • Biomass-based porous carbon material, preparation method and application of biomass-based porous carbon material in separation of 1, 3-butadiene from C4 olefin mixture
  • Biomass-based porous carbon material, preparation method and application of biomass-based porous carbon material in separation of 1, 3-butadiene from C4 olefin mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 6g cornstarch, 0.66g acrylic acid to 60mL distilled water and mix. After uniform dispersion, it was transferred to an autoclave for hydrothermal polymerization at 190° C. for 14 hours, and the obtained carbon precursor was vacuum filtered and washed with water. Then, the carbon precursor was added and mixed with 0.16mol / L NaOH solution, stirred and reacted at 60°C for 12h, then the mixture was washed and dried, placed in a porcelain boat, placed in a high-temperature tube furnace, and raised under nitrogen protection. After reaching 800°C, the activation reaction was carried out for 1.5 h, after cooling, it was acid-washed with 1 mol / L dilute hydrochloric acid and washed with distilled water to neutrality, and a biomass-based porous carbon material was obtained after drying.

[0032] The scanning electron microscope picture of the material prepared in this example is as follows figure 1 As shown, after high-temperature carbonization activation, it still has a unifo...

Embodiment 2

[0035] Add 6g cornstarch, 0.66g acrylic acid to 60mL distilled water and mix. After uniform dispersion, it was transferred to an autoclave for hydrothermal polymerization at 190° C. for 14 hours, and the obtained carbon precursor was vacuum filtered and washed with water. Then, the carbon precursor was added and mixed with 0.16mol / L KOH solution, stirred and reacted at 60°C for 10h, then the mixture was washed and dried, then placed in a porcelain boat, placed in a high-temperature tube furnace, and raised under the protection of nitrogen. After reaching 800°C, the activation reaction was carried out for 1.5 h, after cooling, it was acid-washed with 1 mol / L dilute hydrochloric acid and washed with distilled water to neutrality, and a biomass-based porous carbon material was obtained after drying.

[0036] The scanning electron microscope picture of the material prepared in this example is as follows image 3 As shown, after high-temperature carbonization activation, it still ...

Embodiment 3

[0039] 6g of potato starch and 0.66g of acrylic acid were added to 60mL of distilled water for mixing. After uniform dispersion, it was transferred to an autoclave for hydrothermal polymerization at 190° C. for 14 hours, and the obtained carbon precursor was vacuum filtered and washed with water. Then, the carbon precursor was added and mixed with 0.16mol / L KOH solution, stirred and reacted at 60°C for 10h, then the mixture was washed and dried, then placed in a porcelain boat, placed in a high-temperature tube furnace, and raised under the protection of nitrogen. After reaching 800°C, the activation reaction was carried out for 1.5 h, after cooling, it was acid-washed with 1 mol / L dilute hydrochloric acid and washed with distilled water to neutrality, and a biomass-based porous carbon material was obtained after drying.

[0040] The adsorption isotherm of the material prepared in this example to the carbon tetraolefin component at 298K is as follows Figure 4 As shown, the m...

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Abstract

The invention discloses a biomass-based porous carbon material, a preparation method thereof, and an application of the biomass-based porous carbon material in separation of 1, 3-butadiene from a C4 olefin mixture. The method mainly comprises the following steps of: carrying out hydrothermal carbonization on a biomass carbon source and an organic acid aqueous solution, carrying out ion exchange onan obtained carbon precursor and a certain amount of alkali liquor, and then putting the product into a tubular furnace for carbonization and activation. The biomass-based porous material prepared bythe invention is a microporous carbon material with a stable structure, the range of raw materials is wide, the price is low, the preparation process is simple, and the regeneration performance of the material is excellent. More importantly, high-purity 1, 3-butadiene can be separated from C4 olefin components, and the method has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the field of adsorption and separation materials, and in particular relates to a method and application for selectively separating 1,3-butadiene from carbon tetraolefin mixed gas by using a biomass-based porous carbon material. Background technique [0002] 1,3-Butadiene is one of the basic organic raw materials used in the production of various synthetic rubbers and chemicals, with high commercial value, mainly from steam cracking of naphtha, catalytic cracking of gas oil and methanol production C4 olefin mixed gas in olefin (MTO) process. While the mixed gas mainly contains 1-butene, isobutene and 1,3-butadiene, these components have similar physical and chemical properties (such as boiling point and polarizability). [0003] In order to meet the high-purity requirements of downstream processes for 1,3-butadiene, the industry usually needs to use extractive distillation and solvent absorption for component separation. For e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/318B01J20/20B01J20/30B01J20/34
CPCC01B32/348C01B32/318B01J20/20B01J20/3491
Inventor 肖静杜胜君黄佳武李忠黄保林
Owner SOUTH CHINA UNIV OF TECH
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