Preparation method of branched paraffin in range of gasoline, aviation kerosene or diesel

A technology for aviation kerosene and branched-chain alkanes, which is applied in the field of preparation of branched-chain alkanes in the range of gasoline, aviation kerosene or diesel, and can solve problems such as rising costs and the like

Active Publication Date: 2017-10-31
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

There are two main disadvantages: 1. At present, most of the platform compounds used for research need to be obtained from biomass through two or more steps.
In the two-step reaction, the separation of the catalyst and the rectification of the product are required, which will lead to an increase in cost

Method used

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  • Preparation method of branched paraffin in range of gasoline, aviation kerosene or diesel
  • Preparation method of branched paraffin in range of gasoline, aviation kerosene or diesel
  • Preparation method of branched paraffin in range of gasoline, aviation kerosene or diesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-14

[0023] 1. Preparation of catalyst:

[0024] 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.

[0025] Phosphorylated zirconium oxide (ZrP) catalyst is mixed with 1mol / L zirconium oxychloride and ammonium dihydrogen phosphate aqueous solution at a volume ratio of 2:1, and the obtained precipitate is washed and filtered repeatedly, dried at 120°C for 10 hours, and then placed in Calcined at 400°C for 4h.

[0026] 2) Preparation of solid base catalysts: alkaline earth oxides (MgO, CaO, SrO) and rare earth oxides (La 2 o 3 , CeO 2 ) respectively by the corresponding nitrate in N 2 Calcined under atmosphere for 8h.

[0027] Magnesium aluminum hydrotalcite is the mass of 0.093mol Mg(NO 3 ) 2 ·6H 2 O and 0.0465molAl(NO 3 ) 3 9H 2 O is dissolved in 100ml of water, and the solution is 0.219mol NaOHand 0.0565mol NaOH and 0.0565mol NaOH in a water bath...

Embodiment 13

[0037] Sedimentation and precipitation method: Prepare 0.14M nickel nitrate solution and divide it into two parts A and B in equal volume. Add one of H-ZSM-5, H-MOR, silicon-aluminum composite carrier, H-β molecular sieve and alumina to A. Seed 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 14-18)

Embodiment 14-18

[0038] Table 1 Supported metal A / X type bifunctional catalyst

[0039]

[0040] 2. Self-condensation reaction: In a fixed-bed reactor, put 1.0g of catalyst into the reaction tube, keep the hydrogen pressure in the reactor at 0.3MPa, and the hydrogen flow rate at 150mL / min. / min pumped into the reactor. The reaction results are shown in Table 2 and Table 3.

[0041] Table 2 Acetone self-condensation reaction result

[0042]

[0043]

[0044] It can be seen from Table 2 that, under the action of solid acid and basic catalyst, the self-polymerization product of acetone is mainly propylidene acetone, and a small amount of isophorone is also generated. When metal is doped on the base catalyst (Examples 29-35), an oxygen-containing precursor with 6-15 carbon atoms is generated. Among them, the activity is better when doped with Pd and Pt.

[0045] Table 3 Acetone self-condensation reaction result

[0046]

[0047]

[0048] It can be seen from Table 3 that at high...

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Abstract

The invention relates to a preparation method of branched paraffin in a range of gasoline, aviation kerosene or diesel. The preparation method mainly comprises two parts: (1) carrying out self-condensation reaction on a biomass ABE fermentation product on a first catalyst bed layer of a fixed bed continuous reactor under the catalysis of an acid/alkali catalyst or metal doped solid alkali, so as to obtain a C6-C21 oxygen-containing organic compound; and (2) further carrying out hydrodeoxygenation reaction on a product of the first fixed bed continuous reactor on a second fixed bed continuous reactor at a relatively low temperature and a solvent-free condition under the catalysis of a metal-loaded A/X type bifunctional catalyst, so as to obtain C6-C21 branched paraffin in the range of gasoline, aviation kerosene or diesel. The branched paraffin, namely a liquid fuel can be used as a potential substitute of existing gasoline, aviation kerosene or diesel.

Description

technical field [0001] The present invention relates to a kind of preparation method based on lignocellulose upstream platform compound, completely independent of fossil energy gasoline, aviation kerosene or diesel oil range of branched alkanes, specifically comprising two steps: 1) in a fixed-bed continuous reactor The first catalyst bed layer, the biomass ABE fermentation product acetone is catalyzed by acid / base catalyst or metal-doped solid base, through self-condensation reaction, to obtain oxygen-containing organic compounds with carbon numbers of 6 to 21; 2) in On the second catalyst bed of the fixed-bed continuous reactor, the product generated in the first catalyst bed is catalyzed by the supported metal A / X type bifunctional catalyst, and undergoes one-step hydrodeoxygenation at a lower temperature and without solvent Reaction to obtain branched chain alkanes in the range of gasoline, aviation kerosene or diesel oil with carbon numbers from 6 to 21. Compared with th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00
CPCC10G3/44C10G3/54Y02P30/20
Inventor 李宁盛雪茹张涛李广亿王爱琴王晓东丛昱
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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