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A method of catalyzing lignin-derived aromatic ethers to prepare alkane liquid fuels

A liquid fuel and lignin technology, applied in the field of catalytic conversion of biomass derivatives, can solve the problems of limiting the application of sulfide catalysts, catalyst deactivation, and products susceptible to sulfur pollution, and achieve enhanced ether bond breaking and hydrodeoxygenation performance , large specific surface area, good effect of low temperature deoxidation activity

Active Publication Date: 2015-11-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the product is easily contaminated by sulfur, and the formation of a small amount of water causes catalyst deactivation and other shortcomings, which also limit the application of sulfide catalysts in hydrodeoxygenation.

Method used

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  • A method of catalyzing lignin-derived aromatic ethers to prepare alkane liquid fuels
  • A method of catalyzing lignin-derived aromatic ethers to prepare alkane liquid fuels
  • A method of catalyzing lignin-derived aromatic ethers to prepare alkane liquid fuels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: the preparation of 10wt%Ni / 20NbAC catalyst

[0029] Prepare 20wt% Nb by ammonia precipitation method 2 o 5 ·H 2 O / AC. Weigh 2.43g of niobium oxalate and dissolve it in 90mL of ethylene glycol aqueous solution with a volume ratio of 2:1. After stirring evenly, add 2.4g of activated carbon into it, after stirring, add ammonia water dropwise until the pH is between 9 and 10, and continue stirring 0.5h. Then the temperature was raised to 80°C and kept constant for 24h. After cooling to room temperature, filter with suction and dry at 100°C for 12h.

[0030] 10wt%Ni / 20NbAC was prepared by equal volume impregnation method. Weigh 1.12g of nickel nitrate, dissolve it in 2g of deionized water, add dropwise to 2g of 20wt%Nb prepared above 2 o 5 ·H 2 In O / AC, ultrasonically disperse for 10 minutes, let stand for 24 hours, and then dry at 100°C for 12 hours. The obtained catalyst was calcined in Ar at 400 °C for 3 h.

Embodiment 2

[0031] Embodiment 2: Co-precipitation method prepares 10wt%Ni / 20NbAC catalyst

[0032] Weigh 2.43g of niobium oxalate and 1.67g of nickel nitrate, dissolve them in 90mL of ethylene glycol aqueous solution with a volume ratio of 2:1, stir well, add 2.4g of activated carbon to it, stir and add ammonia water dropwise until the pH is 9-10 Between, continue stirring for 0.5h. Then the temperature was raised to 80°C and kept constant for 24h. After cooling to room temperature, filter with suction and dry at 100°C for 12h. The obtained catalyst was calcined in Ar at 400 °C for 3 h.

Embodiment 3

[0033] Example 3: Preparation of 10wt% Ni / 20NbAC catalyst scale by urea precipitation.

[0034]Take 2.43g of niobium oxalate and 1.67g of nickel nitrate, dissolve them in 90mL of ethylene glycol aqueous solution with a volume ratio of 2:1, add a sufficient amount of urea according to the ratio of urea / (Ni+Nb) molar ratio of 20, stir evenly , 2.4g of activated carbon was added thereto, and stirring was continued for 0.5h. Then the temperature was raised to 90°C and kept constant for 24h. After cooling to room temperature, filter with suction and dry at 100°C for 12h. The obtained catalyst was calcined in Ar at 400 °C for 3 h.

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Abstract

The invention discloses a method for preparing alkane liquid fuel by catalysis of lignin derivative aryl ether, belonging to the technical field of catalytic conversion of biomass derivatives. A catalyst required in the method comprises a deoxidized active component, a hydrogenated active component and a carrier, and is prepared by adopting a precipitating and impregnating method or a coprecipitation method. Richest aryl ether model compounds in a lignin structure are taken as raw materials and are converted into the saturated alkane liquid fuel through one-step catalytic hydrodeoxygenation. The method is suitable for kettle type reaction and continuous fixed bed reaction, and the conversation rate of the raw materials and the selectivity of saturated alkane can reach more than 99%. Moreover, the reaction condition is mild, and the catalyst is simple in preparation process, low in price, relatively high in activity and selectivity and good in stability. According to the technical scheme, a new way for preparing alkane fuel from downstream products derived from renewable resources with rich reserves is provided, and the method has very good application prospects.

Description

technical field [0001] The invention belongs to the technical field of catalytic transformation of biomass derivatives, and relates to a method for preparing saturated alkane liquid fuel by one-step catalytic hydrodeoxygenation of a downstream product aromatic ether derived from lignin. Background technique [0002] At present, with the rapid development of the industrialization level of various countries, the rate of energy consumption is increasing day by day, and the shortage of global fossil resources forces humans to actively look for new alternative energy sources. Biomass is called "green energy" because of its carbon neutrality, easy access, and renewable advantages, which has attracted great attention from human society. Lignin is a kind of natural aromatic polymer compound, second only to cellulose in terms of quantity in plants. It is estimated that 150 billion tons of lignin can be produced by plant growth in the world every year. According to the heat storage c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00B01J23/84
CPCY02P30/20
Inventor 梁长海靳少华陈霄汪镭
Owner DALIAN UNIV OF TECH