Method for preparing biologic oil from blue algae in catalytic cracking mode in vacuum

A catalytic cracking and bio-oil technology, which is applied in the direction of fat production, fat oil/fat production, etc., can solve the problems of low bio-oil yield, low oil quality, and high production cost, and avoid rare precious metals and toxic metals Use, high oil yield, and the effect of improving yield

Inactive Publication Date: 2014-05-07
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing bio-oil by vacuum catalytic cracking of cyanobacteria, so as to solve the problems of low yield of bio-oil produced by existing cyanobacteria, high production cost, and low quality of oil products.

Method used

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  • Method for preparing biologic oil from blue algae in catalytic cracking mode in vacuum

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Experimental program
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Effect test

Embodiment 1

[0029] Calcinate Mg-Al hydrotalcite at 300°C for 1 hour, mix 0.5g of the product with 10g of cyanobacteria powder and put it into a tube furnace with a vacuum of 100kPa, stay at 100°C for 60min, and then heat it at a rate of 10°C / min Raise the temperature to 400°C, crack for 0.5h, and condense the cracked gas through -20°C glass cold hydrazine to collect bio-oil. 6.23g of bio-oil, 2.42g of residual carbon and 1.35g of cracked gas were obtained. The bio-oil yield was 62.3%.

Embodiment 2

[0031] Calcinate Ca-Mg-Al hydrotalcite at 450°C for 3 hours, take 0.5g of the product and 10g of cyanobacteria powder and mix it evenly, then put it into a tube furnace with a vacuum of 50kPa, stay at 100°C for 20min, and then use 10°C / min The heating rate raised the temperature to 400°C, cracked for 1.0h, and the cracked gas was condensed through -20°C glass cold hydrazine to collect bio-oil. 6.37g of bio-oil, 2.34g of residual carbon and 1.29g of cracked gas were obtained. The bio-oil yield was 63.7%.

Embodiment 3

[0033] Calcinate Mg-Al hydrotalcite at 600°C for 5 hours, mix 0.5g product with 10g cyanobacteria powder and put it into a tube furnace with a vacuum of 100kPa, stay at 100°C for 20min, and then heat it at a heating rate of 10°C / min Raise the temperature to 400°C, crack for 1.5 hours, and condense the cracked gas through -20°C glass cold hydrazine to collect bio-oil. 6.42g of bio-oil, 2.35g of residual carbon and 1.23g of cracked gas were obtained. The bio-oil yield was 64.2%.

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Abstract

The invention discloses a method for preparing biologic oil from blue algae in a catalytic cracking mode in vacuum. The biologic oil is prepared by taking blue alga powder as a raw material and a composite metal oxide which takes hydrotalcite as a precursor as a catalyst in the catalytic cracking mode in vacuum. The method takes the composite metal oxide as the catalyst, so that the preparation is simple to carry out; by applying the prepared catalyst to blue alga cracking, the yield of the biologic oil can be effectively improved; moreover, as the metal oxide can absorb the moisture in the blue algae, the quality of the biologic oil is improved. The method disclosed by the invention is simple, the blue algae which is the chief culprit of eutrophication to a water body is taken as the raw material, the waste is turned into wealth, and the environment pollution is alleviated.

Description

technical field [0001] The invention relates to a method for treating cyanobacteria, in particular to a method for preparing bio-oil by vacuum catalytically cracking cyanobacteria with a composite metal oxide as a catalyst. Background technique [0002] Cyanobacteria is the most important type of planktonic algae produced by eutrophication in many inland lakes in China and the world. It exists in water bodies and brings endless harm to people, such as destroying ecosystems and polluting water sources, endangering human health. And emission of odor pollution air and so on. Salvage is a common measure taken by my country to deal with the pollution caused by algal blooms in lakes. It has been used regularly in Dianchi Lake, Taihu Lake, and Chaohu Lake in my country. According to incomplete statistics, in 2011 Jiangsu Province salvaged 970,000 tons of blue-green algae liquid from Taihu Lake, nearly 300,000 tons more than in 2010. How to timely and quickly harmlessly treat and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/00
Inventor 肖国民张俊田路飞徐威薛志君黄兵
Owner SOUTHEAST UNIV
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