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Method for synthesizing high-density aviation fuel by using cyclopentanone as raw material

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

Active Publication Date: 2014-12-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • 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 volume calorific value in some special aircraft.

Method used

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  • Method for synthesizing high-density aviation fuel by using cyclopentanone as raw material
  • Method for synthesizing high-density aviation fuel by using cyclopentanone as raw material
  • Method for synthesizing high-density aviation fuel by using cyclopentanone as raw material

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Experimental program
Comparison scheme
Effect test

Embodiment 1-14

[0031] 1. Catalyst preparation:

[0032] 1) Preparation of solid acid catalysts: Nafion and Amberlyst resins, Y-type molecular sieves, montmorillonite K-10 and KSF are commercial catalyst products purchased directly.

[0033] Zirconium phosphate (ZrP) catalyst is mixed with 1mol / L zirconium oxychloride and ammonium dihydrogen phosphate aqueous solution at a volume ratio of 2:1, the obtained precipitate is washed and filtered repeatedly, dried at 120°C for 10h, and then dried at 400°C Under roasting 4h.

[0034] 2) Preparation of solid base catalysts: alkaline earth oxides (MgO, CaO, SrO, BaO) and rare earth oxides (La 2 o 3 , CeO 2 ) were obtained by calcining the corresponding nitrates under N2 atmosphere for 8h, respectively. 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 ca...

Embodiment 15-31

[0042] 2. Aldol self-condensation reaction: Add 10g cyclopentanone and 1g solid catalyst (the mass fraction of the catalyst is 10wt% of the raw material) into a 30mL closed reaction kettle, heat in an oil bath at 150°C (considering the maximum use temperature of the acidic resin , using 120 ° C) under stirring for 8h. The reaction results are shown in Table 2. After the reaction is finished, the catalyst is separated by centrifugation, and the remaining cyclopentanone is removed by distillation under reduced pressure to obtain a mixed solution of products A, B and some high polymers.

[0043] Table 2 cyclopentanone self-condensation reaction result

[0044]

[0045]

[0046] Table 3 Aldol condensation target product structural formula

[0047]

[0048] It can be seen from Table 2 that under the action of an acidic catalyst, the dimer generated by self-polymerization of cyclopentanone is easy to continue to condense to form trimer and high polymer. Among them, the y...

Embodiment 32-35

[0050] Taking lithium aluminum hydrotalcite (LiAl-HT) as an example, the optimization of reaction conditions was explored.

[0051] 1) Effect of catalyst mass fraction on yield of cyclopentanone condensation reaction

[0052] Table 4. Effect of catalyst mass fraction on A and B yields

[0053]

[0054]

[0055] It can be seen from Table 4 that when the mass fraction of the catalyst in the reaction substrate is 10%, the yield of product A is the highest.

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Abstract

The invention relates to a synthetic route of a hydrocarbon fuel with high density and high volumetric calorific value by using a lignocelluloses-based platform chemical compound as a raw material and completely independent of fossil energy. A liquid fuel obtained by the method can be used in various aircrafts or used as an additive to raise combustion performance of aviation fuel. The method is divided into two parts: 1) under the promotion action of an acid / base catalyst, cyclopentanone (furfural selective hydrogenation product) is subjected to an aldol self-condensation reaction to synthesize unsaturated organic compounds with C10 and C15 polycyclic structures; and 2) a metal loaded A / X catalyst is used to carry out a one-step hydrodeoxygenation and hydrogenation reaction on products generated from the step 1 under low-temperature solvent-free conditions, so as to obtain polycyclic hydrocarbon fuel with carbon number being 10 and 15. The liquid fuel has high density (C10: 0.92g / cm<3>; C15: 1.12g / cm<3>), can be used to effectively raise carrying energy of an aircraft and reduce fuel consumption rate, and meets requirements of high navigational speed, large load and long range.

Description

technical field [0001] The present invention relates to a synthetic route of aviation fuel based on lignocellulose-derived platform compounds that is completely independent of fossil energy, which specifically includes two steps: 1) starting from cyclopentanone (lignocellulose-based furfural selective hydrogenation product) through The aldol condensation reaction generates oxygen-containing organic compounds with carbon numbers of 10 and 15; 2) one-step hydrodeoxygenation of the oxygen-containing compounds by a supported metal catalyst 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 attracted widesprea...

Claims

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Application Information

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IPC IPC(8): C10G3/00
CPCY02P30/20
Inventor 张涛杨金帆李宁王爱琴丛昱王晓东
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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