Method for preparing monophenol chemicals by catalyzing lignin depolymerization through metal organic framework material derivative loaded ruthenium

A metal-organic framework and derivative technology, which is used in the field of biomass degradation, metal-organic framework material derivatives supported ruthenium catalyzed lignin conversion to prepare monophenolic chemicals, and can solve the problems of catalyst performance degradation, catalyst susceptibility to deactivation, etc. , to achieve the effect of high conversion rate, lignin conversion rate and single-classification chemical yield improvement, and simple process conditions

Active Publication Date: 2021-05-28
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process conditions of this technology need to reach 300°C to achieve the best yield conditions, and under the process conditions of 300°C, the coking phenomenon ...

Method used

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  • Method for preparing monophenol chemicals by catalyzing lignin depolymerization through metal organic framework material derivative loaded ruthenium
  • Method for preparing monophenol chemicals by catalyzing lignin depolymerization through metal organic framework material derivative loaded ruthenium
  • Method for preparing monophenol chemicals by catalyzing lignin depolymerization through metal organic framework material derivative loaded ruthenium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: 3wt.%Ru / ZrO 2 Preparation of @C catalyst

[0036] Zirconium-based metal-organic framework derivatives supported ruthenium-based metal catalysts through a two-step process:

[0037] (1) ZrO 2 Preparation of @C carrier: Weigh 1.16g of ZrCl with a purity of 99.9% 4 Solid, 0.83g of PTA (terephthalic acid) solid with a purity of 99%, the two were added to 250mL of a DMF solution with a purity of 99.5%, and 25mL of acetic acid with a purity of 99.5% was added. The prepared reaction liquid system was ultrasonicated for 30 min, transferred to a reaction vessel, and reacted at 120° C. for 24 h. After the reaction was completed, the reaction system was cooled to room temperature and centrifuged to obtain a white solid. The obtained white solid was washed several times with DMF, ethanol, and deionized water respectively, dried overnight in a vacuum oven, and ground to obtain a white powder, which is the carrier precursor. Transfer the white powder to a tube furnace...

Embodiment 2

[0040] Example 2: 3wt.%Ru / ZrO 2 Preparation of @C catalyst

[0041] Zirconium-based metal-organic framework derivatives supported ruthenium-based metal catalysts through a two-step process:

[0042] (1) ZrO 2 Preparation of @C carrier: Weigh 1.16g of ZrCl with a purity of 99.9% 4 Solid, 0.83g of PTA solid with a purity of 99%, the two were added to 250mL of a DMF solution with a purity of 99.5%, and 25mL of acetic acid with a purity of 99.5% was added. The prepared reaction liquid system was ultrasonicated for 30 min, transferred to a reaction vessel, and reacted at 120° C. for 24 h. After the reaction was completed, the reaction system was cooled to room temperature and centrifuged to obtain a white solid. The obtained white solid was washed several times with DMF, ethanol, and deionized water respectively, dried overnight in a vacuum oven, and ground to obtain a white powder, which is the carrier precursor. Transfer the white powder to a tube furnace and calcinate at 55...

Embodiment 3

[0044] Example 3: 0.5wt.%Ru / ZrO 2 Preparation of @C catalyst

[0045] Zirconium-based metal-organic framework derivatives supported ruthenium-based metal catalysts through a two-step process:

[0046] (1) ZrO 2 Preparation of @C carrier: Weigh 1.16g of ZrCl with a purity of 99.9% 4 Solid, 0.83g of PTA solid with a purity of 99%, the two were added to 250mL of a DMF solution with a purity of 99.5%, and 25mL of acetic acid with a purity of 99.5% was added. The prepared reaction liquid system was ultrasonicated for 30 min, transferred to a reaction vessel, and reacted at 120° C. for 24 h. After the reaction was completed, the reaction system was cooled to room temperature and centrifuged to obtain a white solid. The obtained white solid was washed several times with DMF, ethanol, and deionized water respectively, dried overnight in a vacuum oven, and ground to obtain a white powder, which is the carrier precursor. Transfer the white powder to a tube furnace and calcinate at ...

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Abstract

The invention discloses a method for preparing monophenol chemicals by catalyzing lignin depolymerization through metal organic framework material derivative loaded ruthenium. According to the method, lignin is taken as a raw material, organic micromolecular alcohol is taken as a reaction medium, and selective conversion of lignin is realized by regulating and controlling the loading amount of catalyst metal ruthenium and conditions of a catalytic system, and meanwhile, formation of a byproduct coke is inhibited. Under the conditions that the ruthenium loading capacity is 0.5 wt.%-5 wt.%, the H2 pressure is 1-5 MPa, the reaction time is 230-290 DEG C and the reaction time is 2-12 h, the lignin conversion rate can reach 80.20% to the maximum, the monophenol product yield can reach 14.45 wt.%, the coke rate is only 0.8 wt.% to the minimum, the 4-ethyl phenol yield reaches 5.56 wt.% to the maximum, and the selectivity can reach 41.72% to the maximum. After the catalyst is repeatedly used for 10 times, the activity is not obviously reduced.

Description

technical field [0001] The invention relates to biomass degradation, in particular to a method for preparing monophenolic chemicals by catalyzing lignin conversion with metal-organic framework material derivatives loaded with ruthenium; it belongs to the field of high-value utilization of renewable biomass. [0002] technical background [0003] Energy is the foundation and support for national prosperity and sustainable economic development. In order to achieve a further breakthrough in scientific and technological civilization, the energy problem has become a key problem that people have to face and solve. In the entire energy system, biomass, as the only renewable carbon resource in nature, occupies an important position. [0004] In biomass, lignin is a complex polymer compound mainly present in the woody part of plants, and together with cellulose (40%-50%) and hemicellulose (20%-30%), it constitutes the three components of woody biomass. large components. Hemicellulo...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J37/08B01J37/16B01J37/02C07C37/54C07C39/04C07C39/06C07C39/07C07C39/10C07C41/18C07C43/23C07C51/377C07C59/52C07C59/64C07C67/317C07C69/732C07C69/734C07C45/51C07C49/84
CPCB01J23/462B01J37/086B01J37/16B01J37/0201C07C37/004C07C41/18C07C51/377C07C67/333C07C45/51C07C39/04C07C39/06C07C39/07C07C39/10C07C43/23C07C59/52C07C59/64C07C69/732C07C69/734C07C49/84Y02P20/52
Inventor 李雪辉郑歆来龙金星吕凯奇
Owner SOUTH CHINA UNIV OF TECH
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