Preparation method and application of a biomass-based hydrothermal carbon-supported nano-aluminum catalyst

A technology of hydrothermal carbon and nano-aluminum, which is applied in the direction of catalyst activation/preparation, preparation of sugar derivatives, physical/chemical process catalysts, etc. It can solve the problems of enzymes that cannot be reused, low stability, and difficult to separate homogeneous systems.

Active Publication Date: 2021-09-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the industrial production of this process is mainly realized by biological enzymatic methods. In view of the instability of enzymes, this technical path still faces technical problems such as low stability and the inability of enzymes to be reused.
Part of the research is dedicated to the study of homogeneous catalysts, but homogeneous systems face the problem of difficult separation from the beginning

Method used

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  • Preparation method and application of a biomass-based hydrothermal carbon-supported nano-aluminum catalyst
  • Preparation method and application of a biomass-based hydrothermal carbon-supported nano-aluminum catalyst
  • Preparation method and application of a biomass-based hydrothermal carbon-supported nano-aluminum catalyst

Examples

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Comparison scheme
Effect test

preparation example Construction

[0027] Such as figure 1 As shown, the preparation method and application of a kind of biomass-based hydrothermal charcoal supported nano-aluminum catalyst provided by the present invention comprises the following steps:

[0028] 1) The corn stalks are washed to remove dust, air-dried and crushed, and passed through a 40-mesh sieve.

[0029] 2) Add 20 g of corn stalk powder and 200 ml of 0.5 mol / L AlCl in a glass-lined reactor (4500, Parr Instrument Company, America) 3 Aqueous solution, the ratio of solid to liquid is 1:10 (g / ml). The reaction conditions were controlled by a Parr 4848 controller, and the stirring speed was 60r / min. Keep warm for 4 hours, and set three different hydrothermal carbonization temperatures of 160°C, 180°C and 200°C. After the reaction system was cooled to room temperature, the hydrothermal solid was vacuum filtered and washed, and then dried in an oven at 105° C. for 8 hours.

[0030] 3) The samples prepared at different hydrothermal temperatures...

Embodiment example 1

[0037] 1. Preparation of aluminum-containing hydrothermal carbon

[0038] Add 20 g of corn stover and 200 mL of 0.5 mol / L AlCl in a glass-lined reactor (4500, Parr Instrument Company, America) 3 Aqueous solution, the solid-to-liquid ratio is 1:10 (g / mL). Such as figure 1, using Parr 4848 controller to control the reaction conditions, stirring speed 60r / min. Keep warm for 4 hours, and set three different hydrothermal carbonization temperatures of 160°C, 180°C and 200°C. Two parallel experiments were performed for each group of samples. After the reaction system was cooled to room temperature, the hydrothermal solids were vacuum filtered and washed, and then dried in an oven at 105° C. for 8 hours to obtain aluminum-containing hydrothermal carbon solids. AlCl 3 The addition of the solution lowered the temperature of lignocellulose hydrothermal char formation.

Embodiment example 2

[0040] 2. Preparation of aluminum-supported hydrothermal carbon catalyst

[0041] The samples prepared above at different hydrothermal temperatures were calcined under anaerobic and anaerobic environments. The low-oxygen calcination is carried out in a muffle furnace. Weigh 1g of aluminum-containing hydrothermal charcoal solid into a 30mL porcelain crucible, cover it, fix it with a crucible shelf and place it in a muffle furnace for calcination for 1h. The heating rate is 5°C / min. Three different calcination temperatures 300°C, 400°C and 500°C. Anaerobic calcination was carried out in a tube furnace, and 1 g of hydrothermal charcoal was also weighed and placed in a rectangular corundum boat to calcine the sample (experimental conditions: temperature 300°C, 400°C and 500°C, heating rate 5°C / min, Holding time 1h, Ar flow rate is 120cm 3 / min), prepared as an aluminum-hydrothermal carbon catalyst, and the prepared catalyst was ground with an agate mortar. The Al-hydrothermal c...

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Abstract

The invention discloses a preparation method and application of a biomass-based hydrothermal carbon-loaded nano-aluminum catalyst. The rich and cheap agricultural waste corn stalks are used as raw materials. After the corn stalks are air-dried and pulverized, a certain amount of corn stalks are mixed with a certain concentration of aluminum chloride solution, and the water loaded with nano-aluminum is obtained by one-pot hydrothermal carbonization for a certain period of time. Hot charcoal solid; then the obtained hydrothermal charcoal solid is subjected to aerobic calcination at 300-500° C. for 1 h to obtain a hydrothermal charcoal-supported nano-aluminum catalyst. The catalyst prepared by the present invention realizes 42.6% yield and 83.6% selectivity of fructose at 180° C. for 5 minutes. It has high catalytic activity, selectivity and cycle characteristics. Significantly increases the catalytic effect of glucose isomerization to fructose.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of biomass, in particular to a preparation method of a biomass-based hydrothermal carbon-supported nano-aluminum catalyst and its application in the isomerization of glucose into fructose. Background technique [0002] The synthesis of high-value-added fuels and platform compounds from renewable biomass resources provides an effective way to address increasingly severe environmental and energy issues. Therefore, a lot of research is devoted to realize the sustainable chemical conversion of lignocellulose, deeply explore its important potential in fuel and industrial chemicals, in order to explore an economical and environmentally friendly technical route to realize efficient conversion of lignocellulose. [0003] Cellulose, starch and hemicellulose can be easily hydrolyzed to obtain glucose. Glucose, as a rich and mature platform compound, can be converted into various high value...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J35/08B01J37/08B01J37/10C07H1/00C07H3/02
CPCB01J21/18B01J35/08B01J37/088B01J37/10C07H1/00C07H3/02
Inventor 张玺铭刘蒋龙盛奎川钱湘群鄂爽
Owner ZHEJIANG UNIV
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