A metal-free supported biochar deoxygenation catalyst and method for preparing liquid fuel by catalyzing lipid compounds
A technology of carbon deoxygenation catalyst and liquid fuel, which is applied in the preparation of liquid hydrocarbon mixture, physical/chemical process catalyst, biological raw material, etc., to achieve significant catalytic effect, overcome poor repeatability, and overcome technical difficulties.
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Embodiment 1
[0035] The carrier gas was nitrogen, and the pyrolytic carbonization conditions were kept at 700 °C for 2 hours. The scanning electron microscope (SEM) image of C2 rice straw biochar is shown in image 3 . The component distribution of bio-oil obtained after rice straw biochar deoxygenation catalyst C2 catalyzed the pyrolysis and upgrading of rapeseed oil is shown in GC-MS Figure 4 , chemical component differentiation see Figure 5 , compared with the direct pyrolysis of rapeseed oil, the content of aromatic hydrocarbons in bio-oil is significantly increased, the content is about 70% or more, and the content of acid lipids is about 5% or less, which further shows that the biochar deoxidation catalyst has a significant deoxidation effect. Can improve the quality of bio-oil.
[0036] The catalytic effect of biochar deoxidation catalysts prepared from different organic materials on the upgrading of lipid compounds was tested. The catalyst test conditions are: rapeseed oil is u...
Embodiment 2
[0040] Using rice straw as the organic material, the carrier gas is nitrogen, and it is kept at different temperatures for 2 hours for pyrolytic carbonization.
[0041] The catalytic effect of biochar deoxidation catalysts prepared at different temperatures on the upgrading of oils and fats was tested. The catalyst test conditions are: rapeseed oil is used as the raw material of oily compounds, 0.4g biochar deoxidation catalyst, rapeseed oil WHSV=2 h -1 , the reaction temperature is 600°C, and the carrier gas is nitrogen. The results are shown in Table 2, which shows that the pyrolysis carbonization temperature has a great influence on the catalytic activity of the unsupported biochar catalyst. When the pyrolysis carbonization temperature reaches 800 °C, the deoxygenation efficiency of the catalyst is very poor, and the oxygen content of the biofuel is as high as 6.81%. . When the pyrolytic carbonization temperature is 300-750°C, it has a good effect, and the more suitable p...
Embodiment 3
[0045] Rice was used as the organic material, the carrier gas was nitrogen, and the pyrolysis was carried out at a temperature of 700°C for different periods of time.
[0046] The catalytic effect of the biochar deoxygenation catalysts prepared under different pyrolysis times on the upgrading of oils and fats was tested. Catalyst test conditions are: rapeseed oil is used as the raw material of oil compounds; 0.4g biochar deoxidation catalyst, rapeseed oil WHSV=2 h -1 , the reaction temperature is 600°C, and the carrier gas is nitrogen. The results are shown in Table 3, indicating that the biochar deoxidation catalysts prepared under different pyrolysis and carbonization times all have deoxidation effects, but the pyrolysis and carbonization time has a certain influence on the catalytic deoxidation effect of biochar (oxygen content of bio-oil), and the more suitable pyrolysis The carbonization time is 1-24 hours, and the more optimal carbonization time is 1-4 hours.
[0047] ...
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