Method for preparing bio-oil and/or pyrolytic gas by pyrolysis of biomass
A biomass pyrolysis and biomass technology, applied in the field of chemical industry, can solve the problems of harsh reaction conditions, high temperature and pressure, complex process, etc., and achieve the effect of low production cost, large profit margin, and simple equipment process
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Embodiment 1
[0048] 1. Weigh 20g NaOH (analytical grade AR) and add it to 380g tap water to obtain a 5% NaOH solution.
[0049] 2. After the dried corncobs (with a water content of 5%-15%) are pulverized by a pulverizer, they are passed through a 20-mesh sieve to obtain corncob powder.
[0050] 3. Weigh 150g of the corncob powder obtained in step 2, add it to 75g of the NaOH solution obtained in step 1, stir and mix evenly, let it stand for 3 hours, put it in an oven at 80°C for 12 hours, and dry the dried corncob The powder is passed through a 20-mesh sieve to obtain catalyst-containing corncob powder.
[0051] 4. Take by weighing 31.8 g of corn cob powder obtained in step 3, and add 124.7 g of oil bottoms into the colloid mill and fully mix to obtain a pyrolysis reactant whose corn cob content is 20% (hereinafter referred to as solid content). The reactant was added to a pyrolysis rectification tower, and pyrolyzed at normal pressure and 270° C. for 0.5 h to obtain pyrolysis liquid and ...
Embodiment 2
[0057] Steps 1-3 are the same as in Example 1. In step 4, the solid content is 30%; other reaction conditions are the same as in Example 1. After the pyrolysis is complete, the liquid yield is 64.69%, and the gas yield is 13.12%. , the solid content is 30% to carry out repeatedly experiment, the liquid yield obtained is all about 65%, and repeatability is good.
[0058] The obtained bio-oil was taken for detection, and the results are shown in Table 1.
[0059] Table 1 Bio-oil technical indicators
[0060] Analysis Project
[0061] 10% recovery temperature, ℃
[0062] The results show that the obtained bio-oil has a high calorific value of 41.59MJ / kg, which is higher than that of fuel oil (39.8MJ / kg). At the same time, its density, flash point, mechanical impurities and other indicators are similar to those of fuel oil, so it can be used to replace fuel oil. . Biodiesel can also be obtained through further deep processing or an emulsification process can...
Embodiment 3
[0068] Steps 1-3 are the same as in Example 1. In step 4, the material with a solid content of 40% is prepared, and the pyrolysis time is 0.3h. Other reaction conditions are the same as in Example 1. After the pyrolysis is complete, the liquid yield is 57.83%. , and the gas yield was 18.20%.
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