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A method and product of biomass co-production of furfural and carbon quantum dots

A technology of carbon quantum dots and biomass, applied in the field of biomass co-production of furfural and carbon quantum dots, can solve the problems of high cost and low application, and achieve the effect of providing yield and high furfural selectivity

Active Publication Date: 2021-07-02
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, carbon nanotubes, carbon fibers, graphite rods, carbon ash and activated carbon are mostly used as carbon sources. The cost of such raw materials is relatively high, and the method of using biomass as a raw material to prepare carbon quantum dots is relatively low in cost but relatively seldom used.

Method used

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  • A method and product of biomass co-production of furfural and carbon quantum dots
  • A method and product of biomass co-production of furfural and carbon quantum dots
  • A method and product of biomass co-production of furfural and carbon quantum dots

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Experimental program
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Effect test

Embodiment 1

[0049] (a) Heat the 40-mesh to 80-mesh biomass raw material at 100°C for 24 hours to dry, and then place the biomass raw material and the Na / Fe composite solid acid catalyst in the first part of the reactor at a mass ratio of 1:10. In the reaction zone and the second reaction zone, feed nitrogen into the reactor to pressurize to 1.5MPa, put the reactor into the reactor after the two-stage fixed bed reaches 750°C, and heat for 15 minutes to pyrolyze the biomass raw material to produce solid products and volatile matter, wherein the volatile matter undergoes secondary cracking under the catalysis of the solid acid catalyst, and then enters the condensation device to form a liquid product;

[0050] (b) After the reaction is completed, cool to room temperature and release the pressure to atmospheric pressure, use methanol to extract the liquid product to obtain furfural, and dissolve the solid product in ethanol solvent, the mass ratio of solid product to ethanol solvent is 1:30, u...

Embodiment 2

[0055] In this embodiment, the temperature of the fixed bed is 550° C., and other conditions are the same as in Embodiment 1.

Embodiment 3

[0057] In this embodiment, the temperature of the fixed bed is 650° C., and other conditions are the same as in Embodiment 1.

[0058] Figure 5 It is the GC peak area of ​​the furfural that embodiment 1~3 makes and the GC peak area percentage figure of each product, as can be seen from the figure, the selectivity of furfural is very high in the furan compound product, and all proportion is greater than in the furan compound 50%, and with the increase of heating temperature, the yield of furfural (peak area percentage) increases first and then decreases, and reaches the maximum at 650°C;

[0059] Image 6 It is the FTEM result figure of the carbon quantum dots that comparative example 1 and embodiment 1~3 make, wherein a, b, c, d are the carbon that comparative example 1, embodiment 2, embodiment 3, embodiment 1 make respectively Quantum dots, the results show that the low-temperature pyrolysis in Comparative Example 1 is highly aggregated amorphous biomass carbon, and as th...

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Abstract

The invention belongs to the field of biomass conversion, and specifically discloses a method and a product for co-producing furfural and carbon quantum dots from biomass. The method includes placing the dry biomass raw material and the solid acid catalyst in the first reaction zone and the second reaction zone respectively, feeding an inert gas to pressurize and heating for a period of time, cooling to room temperature after the reaction is completed, and using an organic solvent to The liquid product is extracted to obtain furfural, and the solid product is dissolved in an organic solvent, ultrasonically oscillated to make it fully dissolved, and then the supernatant is selected, centrifuged and filtered to obtain the filtrate, the pH of the filtrate is adjusted, and then dialyzed to obtain the dialysis filtrate, and finally The dialysis filtrate was freeze-dried to obtain carbon quantum dots. In the present invention, the primary volatile matter produced by pyrolysis of biomass raw materials at high temperature undergoes secondary pyrolysis to generate furfural under the action of a solid acid catalyst, and at the same time, carbon quantum dots with better quality are obtained, thereby realizing the combination of furfural and carbon quantum dots. production, with better economy.

Description

technical field [0001] The invention belongs to the field of biomass conversion, and more specifically relates to a method and a product for co-producing furfural and carbon quantum dots from biomass. Background technique [0002] Traditional energy sources such as oil, coal and natural gas have played a vital role in supporting global development. However, in the face of the double crisis of environmental pollution and energy shortage, the development of clean and renewable new energy sources has increasingly attracted the attention of countries all over the world. Biomass is a kind of abundant, non-polluting or low-pollution, low-cost, renewable resources. Biomass is currently the only renewable carbon source in nature, showing its great potential as an alternative energy source. Therefore, the production of chemicals from biomass can replace traditional energy to a certain extent and help support the sustainable development of society. [0003] In recent years, both bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/48C07D307/50C09K11/65B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C07D307/48C07D307/50C09K11/65
Inventor 杨海平白小薇陈应泉陈伟陈旭邵敬爱杨晴曾阔王贤华张世红陈汉平
Owner HUAZHONG UNIV OF SCI & TECH
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