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A kind of method for preparing aviation fuel by hydrogen-free conversion of high water content grease

A high water content, aviation fuel technology, applied in the preparation of liquid hydrocarbon mixtures, petroleum industry, biological raw materials, etc., to avoid energy-intensive dehydration processes, mild reaction conditions, and improve activity and selectivity.

Active Publication Date: 2017-11-17
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The yield of hydrocarbon diesel is only improved after additional methanol or glycerol addition, but there is still a large amount of unreacted oleic acid or stearic acid

Method used

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  • A kind of method for preparing aviation fuel by hydrogen-free conversion of high water content grease

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The hydrodeoxygenation reaction of oil is carried out on a set of autoclave type reaction device. The device is mainly composed of a 250 mL high-pressure reactor, a magnetic stirring device, an electric heating temperature control device, and a temperature and pressure measurement device. During the test, 4.25 g of oily esters, 1.0 g of pre-reduced Pd / C catalyst, and 100 mL of dodecane / water mixed solution with a volume ratio of 90:10 were added to the reactor, sealed and passed into the nitrogen replacement tank. Air 3 times. Start magnetic stirring, set the rotation speed at 700 rpm (the preliminary test shows that the effect of external diffusion can be basically eliminated at this rotation speed), and heat to the set temperature at a heating rate of 5 ºC / min. After the reaction was completed, the reactor was placed in tap water and rapidly cooled to room temperature, and samples were taken for analysis.

Embodiment 2

[0023] The experimental operation of oil hydrodeoxygenation using liquid hydrocarbons as the in-situ hydrogen source was the same as in Example 1, but the volume ratio of the dodecane / water mixed solution was 70:30.

Embodiment 3

[0025] The experimental operation of oil hydrodeoxygenation using liquid hydrocarbons as in-situ hydrogen source is the same as in Example 1, but the volume ratio of dodecane / water mixed solution is 50:50.

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Abstract

The invention discloses a method for preparing aviation fuel by converting oil with high water content without hydrogen. Biomass oil and in-situ hydrogen source are added into a high-pressure reactor, wherein the mass / volume ratio of biomass oil and in-situ hydrogen source is ( 4~5) / 100, add noble metal catalyst, stir and react at 250°C for 12 hours; the in-situ hydrogen source is composed of the following components: liquid hydrocarbon / water (volume ratio)=1:0.1~9. The method does not require an external hydrogen source, and the hydrodeoxygenation reaction using in-situ hydrogen generally has a relatively high reaction rate and can be carried out under relatively low reaction temperature and pressure conditions, which can reduce the demand for high-pressure resistant reaction equipment. Therefore, the method for preparing aviation fuel by hydrogen-free conversion of high-moisture fats and oils of the present invention is suitable for directly converting high-moisture fats and oils into hydrocarbon diesel with high efficiency and low energy consumption, and the reaction rate is fast, and the yield of hydrocarbon diesel in the product reaches 72% %.

Description

technical field [0001] The invention belongs to the field of catalytic conversion and utilization of biomass, and in particular relates to a method for preparing aviation fuel by converting oil with high water content without hydrogen. Background technique [0002] With the continuous reduction of fossil energy resources and the deterioration of the ecological environment, the development and utilization of new renewable energy has become an urgent task. Among numerous biomass resources, microalgae are considered to be a very promising source of renewable energy due to their high cell lipid content (up to 60 wt.%) and short growth cycle. At present, dry microalgae powder is mainly used as raw material to prepare biofuel, but the energy required for the dehydration process of wet microalgae accounts for 90% of the total energy required for biofuel production. In addition, although the technology of converting oil into fatty acid alkyl esters (biodiesel) through transesterifi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00
CPCY02P30/20
Inventor 倪珺江大好毛军吴先元李小年
Owner ZHEJIANG UNIV OF TECH