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Preparation method of tremella polysaccharide modified biomass based coupling reaction catalyst

A technology of Tremella polysaccharide and biomass, which is applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of reduced agglomeration catalytic activity, difficult degradation, and complicated preparation steps. and other problems, to achieve the effects of improved catalytic activity, improved oxidation resistance, and simple preparation steps

Inactive Publication Date: 2016-11-09
仇颖超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: for the currently widely used supported catalysts, inorganic ore materials or synthetic polymer materials are used as carriers, and non-renewable fossil resources are used as raw materials. Stability and anti-oxidation ability are poor, which leads to the disadvantages of easy agglomeration in the catalytic reaction process, reduced catalytic activity, and difficulty in degrading and polluting the environment. A tremella polysaccharide solution obtained by using dried fungus as raw material through high-pressure pulse heat extraction is provided, and then the Spartina stalks are used to prepare porous biochar, modify it with tremella polysaccharide solution and microorganisms, deposit metal palladium nanoparticles on the surface of biochar by reduction deposition method, and obtain a coupling reaction catalyst after drying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020]First, weigh 1 kg of dry white fungus, wash it with deionized water for 10 minutes to remove surface impurities, and after drying, crush it with a jet mill, pass through a 100-mesh standard sieve, and add the sieved white fungus powder into distilled water at a solid-to-liquid ratio of 1:5 After the ultrasonic dispersion is uniform, the tremella powder dispersion is sent into the high-voltage pulse electric field by a peristaltic pump at a rate of 15mL / min, and then treated with an electric field strength of 35kV / cm and a pulse width of 60μs for 30min; then the above-mentioned high-voltage pulse treatment The white fungus powder dispersion was transferred to a water bath at 75°C, kept for leaching for 2 hours, and after the leaching was completed, centrifuged with a horizontal centrifuge at a speed of 6000r / min for 15 minutes to separate the supernatant, which was the white fungus polysaccharide solution, and set aside; Mature Spartina alterniflora stalks are crushed and ...

example 2

[0023] First, weigh 2kg of dry white fungus, wash it with deionized water for 13 minutes to remove surface impurities, and after drying, crush it with a jet mill, pass through a 100-mesh standard sieve, and add the sieved white fungus powder into distilled water at a solid-to-liquid ratio of 1:5 After the ultrasonic dispersion is uniform, the tremella powder dispersion is sent into the high-voltage pulsed electric field by a peristaltic pump at a rate of 18mL / min, and then treated with an electric field strength of 40kV / cm and a pulse width of 70μs for 35min; Transfer the white fungus powder dispersion into a water bath at 80°C, heat-preserve and extract for 3 hours. After the extraction, use a horizontal centrifuge to centrifuge at a speed of 6500r / min for 18 minutes to separate the supernatant, which is the white fungus polysaccharide solution, and set aside; Mature Spartina alterniflora stalks are pulverized and passed through a 50-mesh standard sieve, and the sieved powder ...

example 3

[0026] First, weigh 2kg of dry white fungus, wash it with deionized water for 15 minutes to remove surface impurities, and after drying, crush it with a jet mill, pass through a 100-mesh standard sieve, and add the sieved white fungus powder into distilled water at a solid-to-liquid ratio of 1:5 After the ultrasonic dispersion is uniform, the tremella powder dispersion is sent into the high-voltage pulse electric field by a peristaltic pump at a rate of 20mL / min, and then treated with an electric field strength of 45kV / cm and a pulse width of 80μs for 40min; then the above-mentioned high-voltage pulse treatment Transfer the white fungus powder dispersion into a water bath at 85°C, heat-preserve and extract for 3 hours, centrifuge with a horizontal centrifuge at a speed of 7000r / min for 20 minutes after the extraction, and separate the supernatant, which is the white fungus polysaccharide solution, for later use; Mature Spartina alterniflora stalks are pulverized and passed thro...

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Abstract

The invention discloses a preparation method of a tremella polysaccharide modified biomass based coupling reaction catalyst and belongs to the technical field of biomass based catalyst preparation. The preparation method includes: using dry tremella as a raw material, and obtaining a tremella polysaccharide solution through high-pressure pulse heat extraction; using Spartina alterniflora loisel straw to prepare porous biochar; using the tremella polysaccharide solution and microorganisms to perform compound modification on the porous biochar; depositing metal palladium nanoparticles on the surface of the biochar through a reductive deposition method, and drying to obtain the coupling reaction catalyst. The preparation method is simple in preparation step, a carrier is large in specific surface area, and heat stability and antioxidation performance are improved by higher than 26.53% and higher than 29.38% respectively; the catalyst is high in dispersity in the process of catalytic reaction, catalytic activity is improved by higher than 25.6%, and the catalyst is easy to degrade in natural environment and pollution-free.

Description

technical field [0001] The invention relates to a preparation method of a tremella polysaccharide-modified biomass-based coupling reaction catalyst, which belongs to the technical field of biomass-based catalyst preparation. Background technique [0002] In general, catalytic reaction systems are divided into two types: homogeneous catalysis and heterogeneous catalysis. In the homogeneous reaction, the catalyst and the substrate are in the same phase, the mass transfer rate is fast and the reaction activity is high during the reaction process. However, most homogeneous catalysts are difficult to separate from the reaction substrate and cannot be recycled, and the homogeneous catalyst remaining in the reaction system brings great trouble to the purification of the product. Therefore, its industrial application is limited. The emergence of heterogeneous catalysts has solved the problem of recovery and reuse of homogeneous catalysts, accelerated the process of industrializati...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J35/10C12P1/06
CPCC12P1/06B01J31/069B01J2231/4211B01J35/61
Inventor 仇颖超盛海丰林茂平
Owner 仇颖超