Method for preparing biological fuel oil by fast pyrolyzing biomass

A biofuel and biomass technology, applied in the preparation of biofuels, liquid hydrocarbon mixtures, waste fuels, etc., can solve the problems of large hydrogen consumption and low yield, and achieve improved fuel quality, increased yield, and uniform products. Effect

Inactive Publication Date: 2015-06-24
BEIJING FORESTRY UNIVERSITY
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  • Abstract
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Problems solved by technology

[0004] So far, researchers have mainly focused on reducing the oxygen content of oil in the preparation of bio-oil into bio-fuel, but this requires a large amount of hydrogen consumption
The yield of traditional rapid pyrolysis of biomass is generally 60%, and the yield of treated biomass rapid pyrolysis can reach 80-90%, mainly because the rapid pyrolysis of lignin contained in traditional biomass mainly generates solid pyrolysis carbon, resulting in a relatively low yield

Method used

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  • Method for preparing biological fuel oil by fast pyrolyzing biomass

Examples

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Effect test

Embodiment 1

[0029] (1) The raw larch with a particle size of 1 mm was immersed in dilute sulfuric acid with a concentration of 0.2% for 1 hour at a temperature of 30 °C, the mass ratio of larch and dilute sulfuric acid was 1:20, filtered after immersion, and dried at 105 °C For 3 hours, the dried product was subjected to steam explosion pretreatment in a high-pressure saturated water vapor environment of 120°C and 1Mpa for 60 seconds, then the pressure was instantly vented to normal pressure, the steam explosion product was added to 20 times the mass of methanol, and stirred for 30 minutes , to obtain methanol extract and steam-exploded larch.

[0030] (2) In 100g of steam-exploded larch, add 1500g of distilled water, 30g of glacial acetic acid, and 50g of sodium chlorite in turn, heat at 50°C for 5 minutes, filter to obtain a solid substance, and wash the solid substance with distilled water until the filtrate is medium. properties, and dried at 105 °C for 5 hours to obtain delignified l...

Embodiment 2

[0032](1) The raw material of poplar with a particle size of 3 mm was impregnated with dilute hydrochloric acid with a concentration of 1% at a temperature of 50 ° C for 0.5 hours, the mass ratio of poplar to dilute hydrochloric acid was 1:40, filtered after dipping, and dried at 105 ° C For 4 hours, the dried product was subjected to steam explosion pretreatment for 45 seconds in a high-pressure saturated water vapor environment of 150°C and 0.8Mpa, and then the pressure was instantly discharged to normal pressure, and the steam explosion product was added to 30 times the mass of ethanol, and stirred for 30 minutes. minutes to obtain ethanol extract and steam-exploded poplar.

[0033] (2) In 100g of steam-exploded poplar, add 2000g of distilled water, 40g of glacial acetic acid, and 80g of sodium chlorite successively, heat at 55°C for 7 minutes, filter to obtain a solid substance, and wash the solid substance with distilled water until the filtrate is neutral , and dried at ...

Embodiment 3

[0035] (1) The raw material of corn stalk with a particle size of 5 mm was impregnated with dilute nitric acid with a concentration of 2% at a temperature of 50 ° C for 1 hour, the mass ratio of corn stalk to dilute sulfuric acid was 1:10, filtered after immersion, and dried at 105 ° C For 5 hours, the dried product was subjected to steam explosion pretreatment in a high-pressure saturated water vapor environment of 145°C and 0.75Mpa for 30 seconds, and then the pressure was instantly discharged to normal pressure, and the steam explosion product was added to 40 times the mass of ethylene glycol, Stir for 30 minutes to obtain ethylene glycol extract and steam-exploded corn stover.

[0036] (2) Add 3000g of distilled water, 50g of glacial acetic acid, and 100g of sodium chlorite to 100g of steam-exploded corn stalks in sequence, heat at 70°C for 10 minutes, and filter to obtain a solid substance. Wash the solid substance with distilled water until the filtrate is Neutral, dried...

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Abstract

The invention relates to a method for preparing biological fuel oil by fast pyrolyzing biomass, and belongs to the technical field of biomass energy. The method comprises the following steps: firstly immersing a biomass raw material by using dilute acid, and carrying out steam explosion pretreatment on obtained pickling biomass in a high-voltage saturated steam environment; adding distilled water, glacial acetic acid and sodium hypochlorite to steam explosion biomass; heating, and then filtering to obtain a solid substance; drying to obtain delignification biomass, fast pyrolyzing the delignification biomass to generate pyrolysis steam, and carrying out gas-solid separation to obtain purified pyrolysis steam; introducing the purified pyrolysis steam into a catalytic reactor to generate catalytic esterification pyrolysis steam, and fast condensing the catalytic esterification pyrolysis steam to obtain the biological fuel oil and water. The method disclosed by the invention has the advantages of simple process, high yield of the biological fuel oil and no generated tar oil; the finally obtained biological fuel oil is an oxygen-containing small-molecule stable and inflammable organic substance and can be added to petrochemical products, such as diesel and gasoline.

Description

technical field [0001] The invention relates to a method for preparing biofuel by rapid thermal cracking of biomass, and belongs to the technical field of biomass energy. Background technique [0002] The technology of preparing liquid product bio-oil from biomass by rapid thermal cracking is one of the most promising utilization technologies of biomass thermochemical conversion. This technique usually operates at moderate reaction temperatures (450-550°C), high heating rates (10 3 ~10 5 ℃ / sec), short gas phase residence time (0.5-2 seconds) and under anoxic conditions, it has high conversion efficiency (bio-oil yield of more than 60%), simple process, clean process without pollution, turning waste into treasure, etc. The main product bio-oil is mainly used as chemical raw material and liquid fuel. At present, due to the increasing shortage of fossil fuel resources, the technology of rapid thermal cracking of biomass to prepare liquid fuel has become one of the hot topics ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00C10B53/02
CPCY02E50/10Y02E50/30
Inventor 常建民王文亮任学勇李露霏张忠涛虞宇翔耿晶
Owner BEIJING FORESTRY UNIVERSITY
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