Biomass pyrolysis oil refining method

A biomass thermal cracking and refining method technology, applied in the field of biomass energy conversion, can solve the problems of high cost of additives, complex process, incomplete water removal and acid adjustment, etc., and achieves reduced corrosion, high specific surface area, and effective better results

Inactive Publication Date: 2010-12-01
QINGDAO UNIV
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Problems solved by technology

[0005] In order to achieve the above purpose and solve the shortcomings of existing bio-oil modification technology such as incomplete water removal and acid adjustment, complicated process, high operation or auxiliary cost, the biomass pyrolysis oil involved in the present invention is catalyzed for esterification and dehydration The refining method of acid adjustment includes four process steps of vacuum distillation, acetyl chloride water removal, catalytic esterification and water removal for acid adjustment:

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  • Biomass pyrolysis oil refining method

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Embodiment 1

[0024] First do infrared spectrum analysis on the sawdust raw material bio-oil with a water content of about 30wt%. -1 There is a strong absorption peak nearby which is the symmetrical stretching vibration of C-O-C in ethers; at 1300cm -1 There is a strong absorption peak near the stretching vibration of the C-O bond; at 1400cm -1 There is a weaker absorption peak nearby is -CH in alkanes 3 The characteristic absorption peak; 1600cm -1 The absorption peak nearby is the absorption peak of C=C in the aromatic ring, which is the skeleton vibration of the benzene ring; at 1700cm -1 There is a strong absorption peak nearby which is the stretching vibration of C=O, which is the most recognizable absorption peak in infrared; at 3000cm -1 There are several weaker absorption peaks nearby are C-H and -CH in the benzene ring 3 ,-CH 2 Stretching vibration absorption peak of middle C-H; at 3400cm -1There is a strong absorption peak nearby, which is the -OH stretching vibration associ...

Embodiment 2

[0030] In this embodiment, straw raw material bio-oil with a water content of about 50% is taken, and the composition is more complex, containing a large amount of organic carboxylic acids (such as formic acid and acetic acid), which makes the pH of the bio-oil lower (1 to 3); Take 80mL of slow-speed oil and pour it into a distillation bottle, add 1 / 5 volume of isooctyl alcohol (which can delay the aging of oil at high temperature) and a few zeolites, use the vacuum pump to maintain a low vacuum of 0.02Mpa, and put it in a water bath at 80°C Distill under reduced pressure until basically no fraction flows out. This process can be completed within one hour, and most of the water (about 80%) and low-boiling components can be distilled out, because the distilled low-boiling components are very less, and the oxygen content is very high, so there is no need to re-separate and recover; the acetyl chloride dewatering method is to measure about 20mL of bio-oil after decompression disti...

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Abstract

The invention belongs to the technical field of biomass energy conversion, and relates to a biomass pyrolysis oil refining method. The method comprises the following steps: mixing biological oil stock solution and isooctyl alcohol in the volume ratio of 5:1, adding 2-10 zeolite grains, keeping the low vacuum of 0.02 Mpa, and distilling under reduced pressure in a 80 DEG C water bath until no water can be distilled off, thereby obtaining low-water biological oil; during magnetic stirring, adding equal volume of acetyl chloride to react until no bubbles burst out, thereby obtaining anhydrous biological oil; calculating the generation amount of acetic acid according to the amount of the anhydrous biological oil, adding ethanol to acetic acid in the mol ratio of 2.8:1, mixing catalyst and theanhydrous biological oil in the mass ratio of 1:35, adding 2-10 zeolite grains, stirring, heating for back flow at 80 DEG C, and esterifying to obtain the esterified biological oil; adding anhydrous magnesium sulfate to esterified biological oil in the mass ratio of 1:5 to dehydrate and regulate the acidity; and filtering under reduced pressure to remove solid, thereby obtaining the refined biological oil. The invention has the advantages of simple process route, favorable dehydration effect and high product yield.

Description

Technical field: [0001] The invention belongs to the technical field of biomass energy conversion, and relates to a method for refining biomass pyrolysis oil. The biomass oil is modified and refined into fuel oil that can be used in a large scale after dehydration, catalysis and acid adjustment. Background technique: [0002] Biomass energy is the fourth largest energy after coal, oil, and natural gas, and occupies an important position in the entire energy system. Biomass energy is not only the safest and most stable energy, but also can produce different kinds of energy through a series of conversion technologies, such as biomass solidification and carbonization can produce high-quality solid fuel, biomass gasification can produce gas fuel, biomass Substances can be liquefied to obtain liquid fuels and more. Biomass pyrolysis liquefaction can convert low-quality, low-calorific-value biomass energy into high-quality, high-calorific value, easy-to-transport and store liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/04C10G57/00
Inventor 王翠苹聂兆光胡艳芳吕翠盈
Owner QINGDAO UNIV
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