Method for preparing nitrogen/carbon-containing material by biomass pyrolysis and carbonization
A biomass pyrolysis and nitrogen-carbon material technology is applied in the field of nitrogen-containing carbon material preparation to achieve the effects of simple and easy production process, soil improvement, and suitability for large-scale production
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[0030] Example 1
[0031] In this example, a quartz tubular reactor of 34 mm in diameter and 300 mm in length was used, and the heating section in the reactor was isolated with quartz wool. The quartz reactor was placed in a temperature-controlled furnace. During operation, ammonia gas was used as a carrier gas, and its flow rate was controlled by a gas flow meter. The carrier gas used in this experiment was NH 3 or NH 3 / N 2 , NH 3 / He mixture. The reaction raw materials and the catalyst are mixed evenly and flowed together with the carrier gas flow from the opening of the quartz tube to the pyrolysis interface. The liquid product flows from the reactor to the condenser, the gas product is collected in a gas sampling bag, and the solid product is supported by quartz wool. After the reaction is complete, the catalyst and the solid product produced by the reaction are separated, collected and weighed. The separated solid product is the nitrogen-containing biomass carbon ...
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[0033] Example 2
[0034] In this example, 6 different catalysts were tested for catalytic pyrolysis of cellulose, including: γ-Al 2 O 3 , SiO 2 -Al 2 O 3 , SnO 2 / SO 42- , MCM-41, HZSM-5. The powdery reactant was prepared by physically mixing carbohydrate feed and catalyst. The dosage ratio of catalyst and bagasse in this experiment was 2, the reaction temperature was 550 °C, and the gas flow rate was 200 ml / min. The pyrolysis carbonization time is 0.5h. The catalyst is mixed with cellulose and ground into powder.
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[0036]
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[0037] Example 3
[0038] In this example, the effect of different catalysts to biomass ratios on nitrogen-containing biomass carbon materials was tested, and the catalyst in this experiment was γ-Al 2 O 3 , the reaction temperature is 550°C, the gas flow rate is 200ml / min, and the pyrolysis carbonization time is 0.5h. The catalyst is mixed with cellulose and ground into powder.
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