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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

Active Publication Date: 2014-08-20
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure carbon materials still have some defects

Method used

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  • Method for preparing nitrogen/carbon-containing material by biomass pyrolysis and carbonization
  • Method for preparing nitrogen/carbon-containing material by biomass pyrolysis and carbonization
  • Method for preparing nitrogen/carbon-containing material by biomass pyrolysis and carbonization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this example, a quartz tubular reactor with a diameter of 34 mm and a length of 300 mm was used, and the heating part in the reactor was isolated with quartz wool. Install the quartz reactor 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 evenly mixed and flow 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 and collected and weighed. The separated solid product is nitrogen-containing biomass carbon material. In this exam...

Embodiment 2

[0034] In this example, 6 different catalysts were tested for the 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 powdered reactant was prepared by physically mixing carbohydrate feed and catalyst. In this experiment, the ratio of catalyst to bagasse was 2, the reaction temperature was 550°C, and the gas flow rate was 200ml / min. The pyrolytic carbonization time is 0.5h. The catalyst is mixed with cellulose and ground into powder.

[0035]

[0036]

Embodiment 3

[0038] In this example, the influence of different catalysts to biomass ratios on nitrogen-containing biomass carbon materials is tested. The catalyst in this experiment is 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.

[0039]

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Abstract

The invention provides a method for preparing a nitrogen / carbon-containing material by biomass pyrolysis and carbonization, which comprises the following steps: uniformly mixing biomass and a catalyst, and feeding the catalyst and biomass into a reactor together; in the reactor, heating to perform pyrolysis and carbonization reaction on the biomass organic material in the presence of gas containing reactive nitrogen compounds; and separating the catalyst from the solid product generated by the pyrolysis and carbonization, and collecting the residual solid after pyrolysis reaction to obtain the nitrogen / carbon-containing material.

Description

technical field [0001] The invention relates to the field of preparation of nitrogen-containing carbon materials, in particular to a method for preparing nitrogen-containing carbon materials by pyrolyzing biomass. Background technique [0002] Biomass is an important organic compound with the most existence and widest distribution in nature, mainly composed of carbon, hydrogen and oxygen. With the increasing consumption and pollution of coal and oil resources around the world, people's need to find a renewable and clean energy source is becoming more and more urgent. Compared with fossil energy, biomass energy has the characteristics of wide distribution, large amount, no pollution and renewable. In addition, waste protein, urban organic waste and other wastes are lost in large quantities and have not been effectively utilized, resulting in a great waste of resources and environmental pollution. Biomass resources are the only sustainable source of organic carbon and the on...

Claims

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Application Information

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IPC IPC(8): C05C11/00H01B1/04B01J32/00B01J27/24
CPCY02P60/21
Inventor 张颖徐禄江姚倩韩铮
Owner UNIV OF SCI & TECH OF CHINA
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