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Method for preparing biodiesel by using film integrated reactor

A biodiesel and reactor technology, applied in the preparation of biological raw materials, biofuels, liquid hydrocarbon mixtures, etc., can solve the problems of long reaction time, long process flow, low conversion rate, etc., achieve simple operation, improve reaction rate, The effect of reducing mass transfer resistance

Active Publication Date: 2009-08-26
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of using membrane dispersion to enhance the mass transfer of transesterification reaction can solve many problems in the existing process, such as long reaction time, low conversion rate, large energy consumption and long process flow.

Method used

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  • Method for preparing biodiesel by using film integrated reactor
  • Method for preparing biodiesel by using film integrated reactor
  • Method for preparing biodiesel by using film integrated reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] according to figure 2 Connect the relevant components and equipment, first add 0.35g potassium hydroxide and 93.2g anhydrous methanol to the reactor, and heat it to 60°C, adjust the pressure of the nitrogen cylinder to 0.40MPa, and pass 70.8g soybean oil through the 800nm ​​sheet Alumina ceramic film is dispersed into the reactor mixture, and the dispersion rate is 155kg m -2 h -1 , the total reaction time was 30min, and the yield of methyl soybean oil was calculated to be 85.2% after the reaction solution was separated.

Embodiment 2

[0027] according to figure 2 Connect the relevant components and equipment, first add 0.71g of sulfuric acid and 93.2g of anhydrous methanol to the reactor, and heat it to 50°C, adjust the pressure of the nitrogen cylinder to 0.55MPa, pass 70.8g of soybean oil through the multi-channel alumina with a pore size of 500nm The ceramic membrane is dispersed into the reactor mixture, and the dispersion rate is 131kg m -2 h -1 , the total reaction time was 55min, and the yield of methyl soybean oil was calculated to be 89.8% after the reaction solution was separated.

Embodiment 3

[0029] according to figure 2 Connect the relevant components and equipment, first add 0.71g potassium hydroxide and 93.2g anhydrous methanol to the reactor, and heat it to 40°C, adjust the pressure of the nitrogen cylinder to 0.82MPa, and pass 70.8g soybean oil through a tube with a diameter of 200nm The alumina ceramic film is dispersed into the reactor mixture, and the dispersion rate is 102kg m -2 h -1 , the total reaction time was 40min, and the yield of methyl soybean oil was calculated to be 92.6% after the reaction solution was separated.

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Abstract

The invention relates to a method for preparing biodiesel by using a film integrated reactor, comprising: first, low-carbon alcohol and catalyst are added into the reactor 7, oil is pressurized by a pressure driving device 1; under the pressure action, the oil is dispersed into the reactor 7 from a store tank 3 through a porous membrane dispersing device 6 to be mixed with the low-carbon alcohol for reaction; after that, the biodiesel and glycerol stand still to be layered and separated, so that the biodiesel product is obtained. The method for preparing the biodiesel has the advantages of low energy consumption of equipment, short reaction time, high production rate, simple technique, etc.

Description

Technical field: [0001] The invention relates to a method for preparing biodiesel, in particular to a method for preparing biodiesel by using oil and low-carbon alcohol as raw materials and dispersing and strengthening transesterification through a porous ceramic membrane. Background technique: [0002] In recent years, the energy crisis has increasingly become a global problem, especially the shortage of fossil energy - oil, which has triggered an "energy war". Among them, diesel is widely used as liquid fuel for diesel engines such as large vehicles, ships, generators, etc., and because high-speed diesel engines (for automobiles) are more fuel-efficient than gasoline engines, the demand for diesel is growing faster than gasoline, and some small cars also switch to diesel. But regardless of gasoline or diesel oil, its large-scale use will inevitably lead to further shortage of oil resources. Biodiesel, as a renewable biomass energy, and its environmental friendliness, espe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00
CPCY02E50/13Y02P30/20Y02E50/10
Inventor 李卫星赵磊章秀娟邢卫红徐南平
Owner NANJING UNIV OF TECH