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A method for synthesizing high-density aviation fuel with lignocellulose as raw material

A high-density liquid and hydrocarbon fuel technology, which is applied in the preparation of biological raw materials, liquid hydrocarbon mixtures, and the petroleum industry, and can solve problems such as low density, high reaction temperature, and small volume calorific value

Active Publication Date: 2017-05-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction temperature required in the hydrodeoxygenation step of these methods is still relatively high (350°C).
At the same time, most of the products are chain alkanes, which have the limitations of low density and small calorific value in some special application fields.

Method used

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  • A method for synthesizing high-density aviation fuel with lignocellulose as raw material
  • A method for synthesizing high-density aviation fuel with lignocellulose as raw material
  • A method for synthesizing high-density aviation fuel with lignocellulose as raw material

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Experimental program
Comparison scheme
Effect test

Embodiment 1-14

[0032] 1. Preparation of catalyst:

[0033] 1) Preparation of solid base catalysts: alkaline earth oxides (MgO, CaO, SrO, BaO) and rare earth oxides (La 2 o 3 , CeO 2 ) respectively by the corresponding nitrate in N 2 Calcined under atmosphere for 8h. Alkaline earth and rare earth mixed oxides were mixed with 20wt% NH 3 .H 2 O was added dropwise to the two nitrate solutions mixed in a certain molar ratio, the pH was adjusted to 9, stirring was continued for 1 h, dried overnight at 80 °C, and calcined at 650 °C for 8 h. Magnesium aluminum hydrotalcite is a mixture of Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 Add NaOH and NaCO dropwise to the O solution in a water bath at 70°C 3 in the mixed solution ([CO 3 ] / [Al]+[Mg]=0.53, [OH] / [Al]+[Mg]=2.33), after the dropwise addition, continue to stir and age overnight, filter and wash, dry at 80°C overnight, and calcinate at 450°C for 8h to obtain Magnesium aluminum mixed oxide. Lithium aluminum hydrotalcite is Al(NO 3 ) ...

Embodiment 10

[0039] Sedimentation and precipitation method: prepare 0.14M nickel nitrate solution with equal volume and divide it into two parts A and B, add SiO to A 2 Carrier and an appropriate amount of concentrated nitric acid, add 0.42M urea to B, slowly drop B into A in a water bath at 80°C, stir for 10 hours after raising the temperature to 90°C, filter and wash, dry at 80°C overnight, and roast in air at 500°C for 2 hours, the catalyst after roasting In situ reduction with hydrogen in a fixed bed at 500 °C for 2 h. (see table 1, embodiment 11-15)

Embodiment 11-15

[0040] Table 1 Supported metal A / X type bifunctional catalyst

[0041]

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Abstract

The invention relates to a synthesis route of polycyclic hydrocarbon hydrocarbon fuels with high density and high volume calorific value, which uses lignocellulose-based platform compounds as raw materials and is completely independent of fossil energy. The liquid fuel obtained by the method can be used in various aviation aircraft or used as an additive to improve the combustion performance of aviation fuel. The method of the present invention is divided into two parts: 1) under the joint catalysis of alkali catalyst and Raney metal, cyclopentanol (furfural selective hydrogenation product) synthesizes oxygen-containing organic compounds with carbon numbers of 10 and 15 through Guerbet reaction; 2) Using a supported metal A / X type bifunctional catalyst to carry out a one-step hydrodeoxygenation reaction on the product produced in step 1 at a lower temperature and without a solvent to obtain cyclic hydrocarbon fuels with 10 and 15 carbons. This high-density liquid fuel (C10 bicycloalkane: 0.866g / cm3; C15 tricycloalkane: 0.917g / cm3) can effectively increase the energy carried by the aircraft, reduce the fuel consumption ratio of the engine, and meet the requirements of high speed, large load, and long range.

Description

technical field [0001] The present invention relates to a synthetic route of aviation fuel based on a lignocellulose-derived platform compound completely independent of fossil energy, which specifically includes two steps: 1) starting from cyclopentanol (lignocellulose-based furfural selective hydrogenation product) through The Guerbet reaction produces polycyclic oxygen-containing organic compounds with carbon numbers of 10 and 15; 2) one-step hydrodeoxygenation of these polycyclic oxygen-containing organic compounds by supported metal catalysts to obtain polycyclic hydrocarbon fuels with carbon numbers of 10 and 15 . Compared with the previously reported work, the aviation fuel synthesized in this work has higher density and volume calorific value, and can be widely used as biomass aviation kerosene or diesel oil. Background technique [0002] Facing the dual pressure of energy shortage and environmental degradation, the preparation of liquid fuels from biomass has attrac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00
CPCY02P30/20
Inventor 李宁盛雪茹张涛王爱琴王晓东丛昱
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI