Method for preparing whole biomass base aviation biofuel

A biofuel and biomass technology, applied in the direction of biological raw materials, fuels, liquid carbon-containing fuels, etc., can solve the problems such as the preparation process of biomass-based aviation fuel needs to be improved, and the physical properties and combustion performance do not match.

Active Publication Date: 2017-03-29
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, in the existing research work, the fuel obtained by the preparation process of lignocellulose-based aviation biofuels is mostly single-component alkanes, while the actual aviation fuel is composed of alkanes with a certain distribution of carbon atoms, so in some There will be a mismatch in physical properties and combustion performance
[0005] Therefore, the current preparation process of biomass-based aviation fuel still needs to be improved

Method used

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  • Method for preparing whole biomass base aviation biofuel
  • Method for preparing whole biomass base aviation biofuel
  • Method for preparing whole biomass base aviation biofuel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The dilute acid pretreatment of embodiment 1 lignocellulosic raw material

[0053] The lignocellulosic biomass raw material used is wheat straw, which is produced in Shandong Province. After the wheat straw is crushed, the part with a particle size of 20-60 mesh is taken, and the main components of the wheat straw used are analyzed according to the lignocellulose component determination method of the American Renewable Energy Laboratory. The results are: moisture 4.6%, dextrose Sugar 35.2%, xylan 21.4%, arabinan 2.8%, lignin 21.1%, ash 6.6%, other soluble solids 8.3%.

[0054] Mix the wheat straw raw material with the sulfuric acid solutions of different concentrations shown in the table below according to the ratio of solid to liquid of 1:10kg / L, then stir and pretreat in the autoclave for 30 minutes at the temperature shown in the table below, and then filter to obtain the pretreated solid (i.e. cellulose solids) and xylose solution. The pretreated solids were fully...

Embodiment 2

[0057] The formic acid classification pretreatment of embodiment 2 lignocellulosic raw material

[0058] The lignocellulosic raw material used is the same as in Example 1. Adopt mass concentration to be the formic acid aqueous solution of 75% at the liquid-solid ratio (L / kg) of 10:1 under the condition of 107 ℃ of pretreatment (being soaking treatment) 1h, the mixture adopts vacuum filtration after pretreatment, and the solid matter obtained adopts and During the pretreatment process, formic acid of the same concentration is washed once at a liquid-solid ratio of 5:1 based on the dry weight of the initial solid, and then vacuum-filtered. The solid matter is evaporated under reduced pressure at 90°C and 5kpa absolute pressure to recover most of the formic acid. The obtained solid (i.e. cellulose solid) is fully washed with tap water and then enzymatically hydrolyzed for 120 h at 5% solid concentration, 0.5 g / L Tween 20, pH 4.8, and 50 degrees Celsius with a cellulase dosage of ...

Embodiment 3

[0059] Embodiment 3 xylose is converted into furfural under sulfuric acid catalysis

[0060]After adding 3% by mass of sulfuric acid to the xylose solution in Example 1, heat it in an autoclave. During the reaction, the furfural vapor generated is released intermittently through the gas phase extraction port at the top of the reactor, thereby reducing the amount of furfural in the high-temperature reaction system. residence time to avoid side reactions or degradation of furfural. The reaction temperature was controlled at 175°C, the total reaction time was 180min, the final yield of furfural was 49.5%, and the selectivity was 55%.

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Abstract

The invention provides a method for preparing whole biomass base aviation biofuel. The method includes the steps that raw materials are pretreated, cellulase catalytic hydrolysis is conducted, glucose is biologically fermented and converted into 2,3-butanediol, at least one of lignocellulose biomass, a lignin solid and solid enzymolysis residue is carbonized and sulfonated, xylonic acid is catalytically dehydrated and degraded into furfural, the 2,3-butanediol is subjected to acid catalysis dehydration and converted into methyl ethyl ketone, an aldol reaction happens to the furfural and the methyl ethyl ketone, and oxygen-containing precursor hydrodeoxygenation treatment is conducted. By the utilization of the method, the whole biomass base aviation biofuel with the main raw materials and catalysts coming from lignocellulose can be prepared, the raw materials are renewable, cellulose, hemicellulose and lignin in the lignocellulose are comprehensively used, atom economy and environmental friendliness are achieved, and the net emission of carbon dioxide is remarkably reduced.

Description

technical field [0001] The invention relates to the field of biomass chemical industry, in particular to a method for preparing all biomass-based aviation biofuel by using lignocellulosic biomass as a raw material. Background technique [0002] In recent years, due to the shortage of fossil energy, the increasingly serious environmental problems and the massive emission of greenhouse gases, people began to accelerate the pace of developing clean and renewable energy. Biomass, such as lignocellulose, is the most abundant organic matter in nature. Lignocellulosic biomass is widely distributed and inexpensive, and it is one of the most promising raw materials for the production of renewable biofuels. my country produces more than 700 million tons of crop straw every year, equivalent to 350 million tons of standard coal, more than 10 million tons of forest logging and processing residues, and more than 4 million tons of bagasse. Around 2%, there are still a lot of unutilized. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/02C12P19/14C12P7/18C10L1/04C13K13/00C13K1/02C10G3/00
CPCC10G3/54C10G2300/202C10G2300/70C10G2300/701C10L1/04C10L2200/0469C10L2270/00C10L2290/141C10L2290/58C12P7/18C12P19/02C12P19/14C12P2201/00C12P2203/00C13K1/02C13K13/002Y02P30/20
Inventor 赵雪冰崔兴凯刘德华
Owner TSINGHUA UNIV
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