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Low-temperature aqueous-phase catalyst for lignin phenol derivative hydrodeoxygenation and preparation method thereof

A phenol derivative, hydrodeoxygenation technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of low selectivity of saturated naphthenes, and achieve easy operation and simple preparation process. , the effect of simple reaction process

Inactive Publication Date: 2015-05-20
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can solve the problem of low selectivity of saturated naphthenes in the hydrodeoxygenation process of lignin model compounds under low temperature conditions, and at the same time select water as a solvent to protect the environment

Method used

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  • Low-temperature aqueous-phase catalyst for lignin phenol derivative hydrodeoxygenation and preparation method thereof
  • Low-temperature aqueous-phase catalyst for lignin phenol derivative hydrodeoxygenation and preparation method thereof
  • Low-temperature aqueous-phase catalyst for lignin phenol derivative hydrodeoxygenation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of the 0.5%Ru / Beta catalyst that adopts in the present embodiment is as follows steps:

[0024] 1) A certain amount of Beta molecular sieve raw powder (molar ratio: SiO 2 / Al 2 o 3 =25) placed in a crucible, and calcined in a muffle furnace for 4 hours at a calcining temperature of 550° C. and a heating rate of 5° C. / min. Cool to room temperature and set aside.

[0025] 2) Put 1g of roasted molecular sieve raw powder in a beaker and disperse it into a suspension with 40mL deionized water, add the prepared 1.79mg / mL RuCl 3 Solution 2.8mL, then add a certain amount of water to a total volume of 50mL, continue to stir for 30 minutes. The water was evaporated at 80°C to yield a slurry of solid product. Dry overnight (12 hours) in a constant temperature drying oven at 80°C, and grind into powder.

[0026] 3) Place the quartz boat containing the powder sample in a tube furnace, inject 50 mL / min of hydrogen / argon gas mixture, and reduce at 200° C. ...

Embodiment 2

[0037] In this example, the influence of different supports on the hydrodeoxygenation reaction of diphenyl ether was investigated by using 0.5% Ru catalysts loaded on different supports.

[0038] Table 2 Effect of different acid center supports on the hydrodeoxygenation reaction of diphenyl ether

[0039]

[0040]

[0041] The catalytic results show that under the conditions of the six catalysts, the substrate conversion rate is not much different, but the selectivity of cyclohexane is the highest for Beta and ZSM-5 molecular sieve carriers, which is different from that of image 3 Middle NH 3 - TPD shows consistent results for high acid strength for both materials. HBeta is an ideal acidic support due to the high selectivity of dicyclohexyl ether, a by-product of overhydrogenation, in Ru / ZSM-5.

Embodiment 3

[0043] In this example, the effect of 0.5% Ru / Beta on the hydrodeoxygenation reaction of diphenyl ether at different temperatures (reaction time: 1 hour).

[0044] Table 3 Effects of different temperatures on the hydrodeoxygenation reaction of diphenyl ether

[0045]

[0046] The catalytic results show that under the reaction condition of 140℃, the reaction rate of dehydration of cyclohexanol to cyclohexane is significantly increased, indicating that this temperature is an ideal reaction temperature.

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Abstract

The invention relates to a low-temperature aqueous-phase catalyst for lignin phenol derivative hydrodeoxygenation and a preparation method thereof. The catalyst comprises a zeolite molecular sieve HBeta serving as a carrier and a load Ru, wherein the molar ratio of silicon to aluminum is 10-50, and the loading amount of Ru is 0.1 to 2%. The preparation method comprises the following steps: mixing measured aqueous solution of RuCl3 with a zeolite suspension, evaporating water and drying, and then reducing the obtained solid with hydrogen / argon mixed gas. A cyclic hydrocarbon (the conversion rate is greater than 98% and the selectivity is greater than 95%) is prepared at high selectivity under the relatively mild (100-150 DEG C and 1-4MPa) condition, so that the defects that the reaction conditions are harsh and the energy efficiency is low in the refining process of biomass pyrolysis oil can be overcome. The bifunctional catalyst provided by the invention has the advantages of simplicity and easiness in operation in the preparation process, stable physical and chemical properties, and direct application. At low temperatures, the catalyst shows excellent hydrodeoxygenation activity and extremely high selectivity of saturated hydrocarbons, has a simple and environment-friendly reaction process, and can be widely used in the refining of bio-gasoline.

Description

technical field [0001] The present invention relates to a low-temperature water-phase catalyst for hydrodeoxygenation of phenol derivatives of lignin and a preparation method thereof, specifically to catalyze the hydrodeoxygenation of phenol derivatives in lignin pyrolysis oil to efficiently prepare naphthenes under low-temperature water-phase conditions The catalyst belongs to the research field of synthetic fuel and chemicals derived from biomass. Background technique [0002] At present, the problems of energy shortage and environmental pollution are becoming more and more prominent, and it is imminent to develop new energy sources that are renewable and low in nitrogen and sulfur oxide emissions. Biomass is a widely sourced, renewable, cheap, and low-pollution biological raw material. The new technology of using biomass resources to prepare fuel oil and fine chemicals has attracted more and more people's attention. [0003] Lignocellulose exists in plant cell walls and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/74C07C1/20C07C13/18
Inventor 关乃佳姚刚李兰冬武光军戴卫理
Owner NANKAI UNIV
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