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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 that will occur during the lignin conversion process is more obvious, making the catalyst easy to poison and deactivate. Catalyst performance drops significantly after five cycles

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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