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Load type solid base catalyst for preparing biology diesel fuel and preparation method thereof

A solid base catalyst, biodiesel technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve poor activity and restrict large-scale application of solid base catalysts and other problems, to achieve the effect of easy separation, good reactivity and good stability

Inactive Publication Date: 2009-03-11
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In general, there are still certain problems in the activity and stability of solid base catalysts in current patents and literature, and the activity is poor when recycled, thus restricting the large-scale application of solid base catalysts in industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Catalyst preparation

[0020] Take 0.38g of strontium nitrate powder, dissolve it in 3ml of distilled water, then weigh 1g of mesoporous carbon synthesized with aluminum phosphate as a template, add it to the above solution, stir for 4h, dry at 120°C, and then bake at 1000°C for 6h. That is, a supported solid base catalyst is obtained.

[0021] 2. Test experiment of transesterification reaction activity

[0022] Get 15g glycerol triacetate and 13g methyl alcohol to mix, add 0.3g above-mentioned catalyzer after vigorously stirring, reaction time is 1h, and reaction temperature is 60 ℃, after reaction is finished, filter out catalyzer, adopt gas chromatography to measure the content of fatty acid methyl ester, The obtained conversion rate of triglyceride is 97%, and the activity can still reach 93% after five cycles.

Embodiment 2

[0024] 1. Catalyst preparation

[0025] Take 1.44g of calcium nitrate powder, dissolve it in 6ml of distilled water, then weigh 2g of activated carbon and add it to the above solution, stir for 2h, dry at 110°C, and roast at 850°C for 10h to obtain a supported solid base catalyst.

[0026] 2. Test experiment of transesterification reaction activity

[0027] Take 40g of soybean oil and mix with 16g of methanol, add 1.2g of the above-mentioned catalyst and stir vigorously, the reaction time is 6h, the reaction temperature is 65°C, after the reaction is completed, the catalyst is filtered off, and the content of fatty acid methyl ester is determined by gas chromatography to obtain glycerol The conversion rate of triester is 94%, and the activity can still reach 89% after five cycles.

Embodiment 3

[0029] 1. Catalyst preparation

[0030] Take 0.2g of barium nitrate powder, dissolve it in 6ml of distilled water, then weigh 2g of carbon molecular sieves into the above solution, stir for 6h, dry at 100°C, and roast at 1000°C for 13h to obtain a supported solid base catalyst.

[0031] 2. Test experiment of transesterification reaction activity

[0032] Get 30g of sunflower oil and 27g of methyl alcohol and mix, add 0.3g of above-mentioned catalyzer and stir vigorously, reaction time is 4h, and reaction temperature is 70 ℃, after reaction is finished, filter out catalyzer, adopt the content of gas chromatography to measure fatty acid methyl ester, obtain The conversion rate of triglyceride is 93%, and the activity can still reach 88% after five cycles.

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PUM

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Abstract

The invention belongs to the technical field of catalyst and a preparation method thereof; a loading type solid alkali catalyst used for preparing biodiesel takes alkaline earth metal oxide as an active component and porous carbon as a carrier; the preparation method comprises the following steps: soluble saline solution of alkaline earth metal and carbon materials are dipped with equal volume, stirred evenly, dried and roasted to obtain the catalyst. The catalyst of the invention has simple preparation technique, high activity for catalyzing ester exchange reaction of triglyceride and methanol and low price, can be regenerative and used repeatedly and prolongs the service life of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalysts and preparation methods thereof, and in particular relates to a supported solid base catalyst for catalyzing the transesterification reaction between grease (triglyceride) and methanol to prepare biodiesel below the boiling point of methanol. Background technique [0002] Biodiesel generally refers to substances derived directly or indirectly from biological products that can be used as fuel for diesel engines, including vegetable oils (such as rapeseed oil, peanut oil, soybean oil, cottonseed oil, etc.), cracking products of animal and vegetable oils, or animal and vegetable oils and short-chain alcohols Fatty acid esters obtained by transesterification, etc. Biodiesel currently used in countries around the world mainly refers to fatty acid methyl esters obtained by transesterifying animal and vegetable oils with methanol. With the two oil crises in the last century and the enhancement of envi...

Claims

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Application Information

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IPC IPC(8): B01J23/02B01J21/18C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 刘钢祖艳红贾明君张文祥
Owner JILIN UNIV