Method for preparing bio-oil by catalyzing and cracking microalgae with supported Hangjin No.2 soil solid base catalyst

A solid base catalyst, supported technology, applied in chemical instruments and methods, carbon compounds, chemical/physical processes, etc., can solve the problems of short service life, difficult industrial application, poor stability, etc., and achieve lower production costs and lower costs. , the effect of easy mining

Inactive Publication Date: 2012-11-07
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional homogeneous catalysts, solid base catalysts (such as alkali metals, alkaline earth metal oxides and supported catalysts, hydrotalcite-type solid bases, zeolite molecular sieves, etc.) have higher activity for catalytic thermal cracking to prepare bio-oil, but Poor stability, short service life, difficult for industrial application

Method used

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  • Method for preparing bio-oil by catalyzing and cracking microalgae with supported Hangjin No.2 soil solid base catalyst
  • Method for preparing bio-oil by catalyzing and cracking microalgae with supported Hangjin No.2 soil solid base catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) Screening and cultivation of algal species

[0041] The algal species used in this example is a high-lipid-content Chlorella pyrenoidosa that was independently screened in a freshwater lake and has both autotrophic and heterotrophic functions. The composition of the culture medium is as follows: a strain of chlorella pyrenoidosa with both autotrophic and heterotrophic growth capabilities, the oil content of the chlorella is 30-50%, and the protein content is 40-60%. The composition of Chlorella pyrenoidosa culture medium is as follows (1000mL deionized water): MgSO 4 7 hours 2 O 0.5-2.0g, Na 2 HPO 4 12H 2 O 0.5-2.0g, KNO 3 0.5-2.0g, CaCl 2 0.01-0.05g, EDTA-2Na 0.01-0.05g, ferric ammonium citrate 0.01-0.05g. The initial pH of this prepared medium is 6.5-8.0.

[0042] Preferred medium composition (1000mL deionized water): MgSO 4 ·7H 2 O 1.0g, Na 2 HPO 4 12H 2 O 1.5g, KNO 3 2.0g, CaCl 2 30mg, EDTA-2Na 50mg, ferric ammonium citrate 10mg. The initial pH...

Embodiment 2

[0050] 1) Screening and cultivation of algal species

[0051] The algal species used are Dunaliella salina and Scenedesmus, and the screening and cultivation are the same as those in Example 1, so no repeated description is given here.

[0052] 2) Loaded KI / MgO / Hangjin 2 # Preparation of soil solid alkali catalyst:

[0053] Take MgO / Hangjin 2 respectively # Soil and KI were added into water according to 2:5 (mass ratio), stirred, heated and activated in a constant temperature water bath at 100°C for 4 hours. After the activation reaction is completed, cool, filter with suction, and wash until the pH value is 5-6, then dry the filter cake at 105°C. After drying, grind it into powder, bake it in a vacuum heating furnace at 300°C for 2 hours, put it in a desiccator and cool it to room temperature, pass it through a 200-mesh sieve, and keep it sealed.

[0054] 3) Preparation of biofuel oil by catalytic cracking of microalgae

[0055] The prepared KI / MgO / Hangjin 2 # The soil ...

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Abstract

The invention relates to a method for preparing bio-oil by catalyzing and cracking microalgae with a supported Hangjin No.2 soil solid base catalyst. The method comprises the steps as follows: microalgae and supported Hangjin No.2 soil solid base catalyst are mixed at the weight ratio of (10:1)-(2:1) and then are placed in a thermal cracking reaction device, wherein nitrogen gas is taken as a carrier gas, the heating rate is 10-30 DEG C / min, and the temperature is raised to 350-600 DEG C; and gas generated during thermal cracking process is taken out of the reactor by the carrier gas, undergoes a three-stage cooling system of liquid nitrogen, dry ice and ice-water mixture, and then is collected to obtain liquid bio-oil. The invention further discloses the supported Hangjin No.2 soil solid base catalyst. According to the invention, on the basis that the supported compound solid base catalyst with high activity, high selectivity and low cost is synthesized, microalgae with high grease content is adopted and is transformed into bio-fuel oil through high-temperature catalytic cracking reaction, so that reaction temperature is lowered, green biological energy sources with excellent performances are obtained, and dual purposes of microalgae environmental management and high-value utilization of resources are achieved.

Description

technical field [0001] The invention belongs to the technical field of bioenergy, in particular to a load-type Hangjin 2 # Soil solid alkali catalyst. [0002] The present invention also relates to the use of the above load-type Hangjin 2 # The invention discloses a method for preparing biofuel oil by cracking microalgae with earth solid alkali catalyst. Background technique [0003] The increasing depletion of global non-renewable energy and the global climate change caused by the greenhouse effect pose a serious threat to human survival and sustainable development. The development of green energy with high added value has become a research hotspot. Microalgae is the simplest photosynthetic organism. It is reported that more than 90% of the oxygen in the atmosphere is produced by microalgae. It has the advantages of high photosynthetic efficiency, fast growth and reproduction, strong environmental adaptability, and easy cultivation and amplification. It has been widely u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/16B01J27/08C11B1/00C10L1/02C01B31/08C01B32/318
Inventor 席北斗贾璇夏训峰张列宇李晓光赵颖郭丽岗
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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