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Method and device for producing biodiesel according to coal-based methanol and palm oil supercritical method

A biodiesel, palm oil technology, applied in the direction of biofuel, fatty acid esterification, etc., can solve the problem that biodiesel has not been reported in the literature, and achieve the effect of less corrosiveness of equipment and environmental friendliness

Inactive Publication Date: 2014-03-26
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no literature report on the preparation of biodiesel by the supercritical method of coal-based methanol and palm oil, which are widely and cheaply sourced.

Method used

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  • Method and device for producing biodiesel according to coal-based methanol and palm oil supercritical method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Using plunger pumps 2 and 4, according to the coal-based methanol:palm oil ratio of 40:1, the coal-based methanol in the methanol storage tank 1 and the palm oil in the oil storage tank 3 are continuously fed into the Φ20×1000mm preheater respectively 5. After mixing and preheating to a temperature of 350°C, enter the tubular reactor 6 with a Φ20×5000mm spiral tube, so that the coal-based methanol can undergo transesterification of oil under a supercritical state to produce crude biodiesel and glycerin. Control the temperature of the tubular reactor 6 at 350° C. and the pressure at 20 MPa by automatically controlling the power input of the electric heating, and adjust the residence time of the reactants in the tubular reactor 6 by controlling the opening of the outlet pressure reducing valve 7. 5 minutes. After decompression, the reaction product enters the Φ300×600mm gas-liquid separator 8 and is divided into gas phase (crude methanol) and two liquid phases (the upper ...

Embodiment 2

[0036] Using plunger pumps 2 and 4, according to the coal-based methanol:palm oil leg ratio of 30:1, respectively, the coal-based methanol in the methanol storage tank 1 and the palm oil leg in the oil storage tank 3 are continuously fed into the Φ20×1000mm pre- Heater 5, after mixing and preheating to a temperature of 300°C, enters into tubular reactor 6 with a Φ20×5000mm spiral tube, so that methanol can perform transesterification reaction of oil under supercritical state to generate biodiesel and glycerin. By automatically controlling the power input of the electric heating, the temperature of the tubular reactor 6 is controlled at 300°C and the pressure is at 15MPa, and the residence time of the reactants in the tubular reactor 6 is adjusted by controlling the opening of the outlet pressure reducing valve 7 for 15 minutes. After decompression, the reaction product enters the Φ300×600mm gas-liquid separator 8 and is divided into gas phase (crude methanol) and two liquid ph...

Embodiment 3

[0038] Use plunger pumps 2 and 4 to continuously feed the coal-based methanol in methanol storage tank 1 and the palm oil in oil storage tank 3 into the Φ20×1000mm pre-heater according to the ratio of coal-based methanol:palm oil leg is 35:1. The heater 5, after mixing and preheating to a temperature of 320°C, enters the tubular reactor 6 with a spiral tube of Φ20×5000 mm, so that the methanol can undergo transesterification of oil under supercritical conditions to generate biodiesel and glycerin. By automatically controlling the power input of the electric heating, the temperature of the tubular reactor 6 is controlled at 300°C and the pressure is at 17MPa, and the residence time of the reactants in the tubular reactor 6 is adjusted by controlling the opening of the outlet pressure reducing valve 7 for 10 minutes. After decompression, the reaction product enters the Φ300×600mm gas-liquid separator 8 and is divided into gas phase (crude methanol) and two liquid phases (the upp...

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Abstract

The invention discloses a method and device for producing biodiesel according to the coal-based methanol and palm oil supercritical method, and belongs to the technical field of renewable energy resources. The coal-based methanol and palm oil are sent into a preheater continuously for mixing and preheating, then sent into a tube-type reactor to ensure that transesterification reaction of coal-based methanol is carried out under a supercritical condition; reaction products enter a gas-liquid separator after being decompressed through a reducing valve, so as to generate crude biodiesel and crude methanol; the crude biodiesel is sent into a decompression rectifying tower for rectification to obtain biodiesel and resid; the crude methanol enters a methanol rectifying tower to obtain methanol of which the purity is 99 percent. The method and device have the advantages that the raw materials are easy to obtain and low in price; no catalyst is added; high-quality biodiesel can be obtained through decompression rectifying of the crude biodiesel; the problems, such as corrosion of acid-base catalyst on equipment and difficulty in separating a catalyst, of the conventional catalysis supercritical method are solved; environmental pollution is avoided; the biodiesel is good in quality; the methyl ester conversion is high.

Description

technical field [0001] The invention belongs to the technical field of green and renewable energy, and in particular relates to a method and a device for preparing biodiesel by a supercritical method of coal-based methanol and palm oil. Background technique [0002] Biodiesel is prepared from animal and vegetable oils and fats, and can be used to replace mineral diesel as clean fuel for compression ignition engines. Compared with mineral oil, biodiesel is a clean and renewable energy source. Due to the limited oil resources on the earth, according to the current rate of oil exploitation and use, the world's oil resources will be exhausted within 50 years. With the aggravation of the energy crisis and the increasing shortage of mineral energy (petroleum and coal), finding alternative fuels that are rich in resources, friendly to the environment and economically feasible has become a major problem to be solved urgently for mankind. Therefore, the preparation technology of bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/10
CPCY02E50/10
Inventor 吴玉龙李青海胡湖生陈镇高飞蒲薇华杨明德刘吉
Owner TSINGHUA UNIV
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