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Method for preparing green catalyst from biomass tar and application

A biomass and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve uncontrollable problems and achieve the effect of improving selectivity, high oxygen content, and best catalytic performance

Active Publication Date: 2020-05-29
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Designing a reasonable catalyst to realize the selective hydrodeoxygenation of guaiacol to obtain the target product under mild conditions is the appeal of this process. At the same time, there are many catalysts that can convert guaiacol into naphthenes, and the reaction is relatively thorough. And uncontrollable, there is still a large gap in the valuable products of a certain stage of guaiacol synthesis

Method used

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  • Method for preparing green catalyst from biomass tar and application
  • Method for preparing green catalyst from biomass tar and application
  • Method for preparing green catalyst from biomass tar and application

Examples

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preparation example Construction

[0027] preparation method according to claim 1, is characterized in that, the preparation process of carbon carrier is: 20g carbon precursor biomass tar is dissolved in 100ml absolute ethanol, and activator (K 2 FeO 4 , KOH) aqueous solution was added dropwise to the biomass tar solution, stirred in a 60°C water bath until a uniform solid was obtained, and then dried for 12h to obtain a solid mixture. The solid mixture was ground into uniform fine powder, placed in a tube furnace, and calcined for 2 h at different temperature (400-1000°C) at different heating rates (1-10°C / min) in a nitrogen atmosphere. After cooling to room temperature, wash the sample. Finally, vacuum drying at 100 °C for 12 h was performed to prepare a low-cost carbon carrier.

[0028] In the above preparation method, the catalyst is composed of a carrier and a nickel salt.

[0029]In the above preparation method, the concentration of potassium in the two activators in step (1) is the same and is 0.05-0....

Embodiment 1

[0044] (1) Preparation of carbon carrier with biomass tar: Weigh 20g of carbon precursor biomass tar and dissolve it in 100ml of absolute ethanol, then add 100ml 0.2mol / L activator KOH aqueous solution dropwise to the biomass tar ethanol solution, at 60 °C in a water bath environment for 8 h until a uniform solid was obtained, and then dried at 100 °C for 12 h to obtain a solid mixture. Grind the solid mixture into a uniform fine powder, put it in a tube furnace, raise the temperature to 800°C at 1°C / min in a nitrogen atmosphere, and roast for 2h. After cooling to room temperature, the sample was washed with HCl (1M, 100ML) and refluxed in a water bath for 10 hours, then washed twice with deionized water and washed three times with ethanol. Finally, the low-cost carbon support was prepared by vacuum drying at 100 °C for 12 h.

[0045] The preparation of catalyst, loading mass fraction is 10% metallic single substance nickel: with 1.1010g Ni (NO 3 ) 2 ·6H 2 O was dissolved ...

Embodiment 2

[0058] (1) Preparation of carbon carrier from biomass tar: Weigh 20g of carbon precursor biotar and dissolve it in 100ml of absolute ethanol, then add 100ml of 0.1mol / L activator K 2 FeO 4 The aqueous solution was added dropwise to the biotar solution, stirred in a water bath environment at 60°C for 8h until a uniform solid was obtained, and then dried at 100°C for 12h to obtain a solid mixture. Grind the solid mixture into a uniform fine powder, put it in a tube furnace, raise the temperature to 400°C at 1°C / min in a nitrogen atmosphere, and bake for 2h. After cooling to room temperature, the sample was washed with HCl (1mol / L, 100mL) and condensed and refluxed in a water bath for 10h, then washed twice with deionized water, and washed three times with ethanol. Finally, the low-cost carbon support was prepared by vacuum drying at 100 °C for 12 h.

[0059] The preparation of catalyst: loading mass fraction is 10% metallic single substance nickel, 1.1010g Ni (NO 3 ) 2 ·6H ...

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Abstract

The invention relates to a method for preparing a green catalyst from biomass tar and application. The method comprises the following steps: dissolving biomass tar in absolute ethyl alcohol, adding anactivator solution, reacting to obtain a solid, drying, grinding into powder, heating to 400-1000 DEG C, and roasting to obtain a catalyst carrier; adding the catalyst carrier into a metal nickel salt aqueous solution accounting for 70-90% of the total amount to obtain a turbid liquid; adding a complexing agent into the residual metal nickel salt aqueous solution, dropwise adding an obtained mixture into the turbid liquid, completely evaporating to form a solid, roasting at 450-550 DEG C, and reducing to obtain a green catalyst. The catalyst is applied to bio-oil hydrotransalkylation. The catalyst obtained by the invention has the advantages of high efficiency, stability, greenness, safety, low cost and the like, and has a wide market application prospect.

Description

technical field [0001] The invention belongs to the field of biomass resource development and utilization, and specifically designs a method and application for preparing a green catalyst by utilizing biomass tar. Background technique [0002] With the gradual shortage of traditional resources (coal and oil) and the increase of the greenhouse effect, people are looking for cheaper, clean and renewable energy. Given the abundant biomass resources on earth, which have renewable, CO 2 It has the characteristics of zero emission and can be directly converted into liquid fuel, which has excellent environmental and economic benefits, and is one of the good alternatives to fossil fuels. There has been a trend in recent years to make biomass into functional products such as pharmaceuticals, cosmetics and high-value products such as aromatic hydrocarbons. However, biomass oil has complex composition, unstable chemical properties and high oxygen content, and it is difficult to direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/78C07C29/20C07C29/36C07C35/14
CPCB01J23/755B01J23/78B01J23/002C07C29/20C07C29/36C07C2601/14C07C35/14Y02P30/20
Inventor 李浩王思琪
Owner HEBEI UNIV OF TECH
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