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Method for preparing biological diesel oil antioxidant additive with biomass microwave auxiliary directional thermal decomposition

An antioxidant additive, microwave-assisted technology, used in fuel additives, chemical instruments and methods, petroleum industry, etc., can solve the problem of high cost of antioxidants, and achieve the effects of reducing separation difficulty, good miscibility, and rich mineral element content

Inactive Publication Date: 2008-10-29
NANCHANG UNIV
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AI Technical Summary

Problems solved by technology

There is no need to discuss the high cost of foreign antioxidants
The high cost of directly adding oil antioxidants is also unbearable for biodiesel companies

Method used

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  • Method for preparing biological diesel oil antioxidant additive with biomass microwave auxiliary directional thermal decomposition

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Embodiment 1

[0012] The Chinese fir bark of 100g is cut off and pulverized, after all passing through 20 mesh screens, with 200g mass fraction, be that the dilute sulfuric acid solution of 0.5% is soaked 12 hours and drain gravity water, then it is sent into special-purpose microwave pyrolysis device ( Temporarily do not add ionic liquid medium), confirm the airtightness of the system, and empty the air in the system with nitrogen; control the microwave pyrolysis temperature ≤ 120 ℃, keep it for 20 minutes, collect the acetic acid, formic acid and methanol that occur, and when the liquid at the condensation nozzle The drop rate is less than 1d / min, take out about 103.5g of the collected liquid (containing about 3g of acetic acid, about 1g of methanol, and about 0.1g of formic acid); use nitrogen to empty the air in the system, raise the microwave pyrolysis temperature to ≤150°C, and keep 8min, collect furfural and light bio-oil, when the dripping speed of the liquid at the condensation nozz...

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Abstract

A method for preparing an antioxidant additive of bio-diesel fuel by using microwave-assisted oriented pyrolysis of biomass is characterized in that the method comprises the following steps: cracking biomass such as plant cellulose with rich lignin in the presence of an inorganic acid as the catalyst and under controlled cracking process parameters and a microwave-assisted condition, fraction-collecting the cracking products, circularly using a reducible non-condensible gas component to maximally transform the lignin to phenol residues with small molecular weight, absorbing the phenol products by a functional ionic liquid, synchronously carrying out alkyl modification, and extracting in a solvent to obtain the antioxidant additive of bio-diesel fuel with good oil solubility, strong antioxidant effect and low cost. The method can achieve the green chemical goal of completely utilizing biomass such as plant cellulose.

Description

technical field [0001] The invention relates to a preparation method of a biodiesel antioxidant additive, in particular to a method for preparing a biodiesel antioxidant additive by microwave-assisted directional pyrolysis of biomass. Background technique [0002] my country's current economic development is very rapid, energy demand is growing strongly, and the dependence on oil imports is close to 40%. The development of renewable energy such as biodiesel is a very urgent task to ensure my country's energy security. By 2015, it is predicted that the demand for biodiesel in my country will reach 20 million tons. However, compared with petrochemical diesel, biodiesel contains a large amount of unsaturated fatty acid methyl esters, which can react with oxygen more quickly and produce deposits that can damage the engine. Studies have shown that only the addition of antioxidants can meet the storage life requirements of biodiesel. [0003] Commodities that have been listed ab...

Claims

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Application Information

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IPC IPC(8): C09K15/34C10L10/00
Inventor 刘玉环阮榕生
Owner NANCHANG UNIV
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