Method for jointly preparing carbon nanotube/porous carbon material and hydrogen-rich synthesis gas through biomass pyrolysis

A biomass pyrolysis and porous carbon material technology is applied in the field of biomass pyrolysis combined preparation of carbon nanotubes/porous carbon materials and hydrogen-rich synthesis gas, which can solve the problems of high equipment requirements, high reaction temperature, and increased utilization costs. , to achieve the effect of improving solubility, enhancing interaction and realizing economic value

Active Publication Date: 2021-07-23
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Solid products often have high pyrolysis and developed pore structure, and are often used as fuel and activated carbon precursor materials. When used as activated carbon precursor materials, further activation is required, which increases the cost of utilization; liquid products are highly acidic and contain oxygen. The amount is high, and the utilization rate is low; the main component of the gas product obtained by pyrolysis is CH 4 , CO, H 2 and CO 2 , where syngas (H 2 +CO) is an important chemical raw material, but due to the high oxygen content in the biomass, the H in the product gas 2 content is low, while CO 2 The content is too high, and it will inevitably be mixed with tar, which is difficult to meet the needs of the downstream synthesis process, and needs to provide a higher reaction temperature during operation, which requires higher equipment requirements

Method used

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  • Method for jointly preparing carbon nanotube/porous carbon material and hydrogen-rich synthesis gas through biomass pyrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The experiment used corn stalk powder as raw material. Corn straw particles with a particle size of 50 mesh were selected, washed with deionized water, and dried at 105 °C for 24 h. The dried material was collected in a sample bag for later use. Take 0.01 mol NiCl 2 ﹒ 6H 2 O with 0.01 mol CaCl 2 ﹒ 2H 2 O was dissolved in 1500mL of water, and then 10.0 g of dry corn stover powder was impregnated in the above NiCl 2 and CaCl 2 In the mixed solution of corn stalk powder and NiCl 2 and CaCl 2 The mixed solution was fully contacted, and then dried in a drying oven at 105 °C for 24 h to obtain a Ni-Ca-loaded dry material. Take 5.0 g of the obtained Ni-Ca-loaded dry material and heat it on a fixed bed at 800 °C for 60 min under an inert atmosphere with a nitrogen flow rate of 150 ml / min. The solid product obtained by pyrolysis is carbon nanotube / porous carbon material, and its SEM image is as follows figure 1 shown. The gas obtained by pyrolysis is purified by ...

Embodiment 2

[0026] The experiment used corn stalk powder as raw material. Corn straw particles with a particle size of 50 mesh were selected, washed with deionized water, and dried at 105 °C for 48 h. The dried material was collected in a sample bag for later use. Take 0.03 mol NiCl 2 ﹒ 6H 2 O with 0.03 mol CaCl 2 ﹒ 2H 2 O was dissolved in 3000mL of water, and then 10.0 g of dry corn stover powder was impregnated in the above NiCl 2 and CaCl 2 In the mixed solution of corn stalk powder and NiCl 2 and CaCl 2 The mixed solution was fully contacted, and then dried in a drying oven at 105 °C for 48 h to obtain a Ni-Ca-loaded dry material. Take 5.0 g of the obtained Ni-Ca-loaded dry material and heat it on a fixed bed at 800 °C for 60 min under an inert atmosphere with a nitrogen flow rate of 150 ml / min. The solid product obtained by pyrolysis is carbon nanotube / porous carbon material. The gas obtained by pyrolysis is purified by 3000 ml of 0.005g / ml calcium hydroxide solution (t...

Embodiment 3

[0028] The experiment used corn stalk powder as raw material. Corn straw particles with a particle size of 50 mesh were selected, washed with deionized water, and dried at 105 °C for 24 h. The dried material was collected in a sample bag for later use. Take 0.05 mol NiCl 2 ﹒ 6H 2 O with 0.05 mol CaCl 2 ﹒ 2H 2 O was dissolved in 5000mL of water, and then 10.0 g of dry corn stover powder was impregnated in the above NiCl 2 and CaCl 2 In the mixed solution of corn stalk powder and NiCl 2 and CaCl 2The mixed solution was fully contacted, and then dried in a drying oven at 105 °C for 24 h to obtain a Ni-Ca-loaded dry material. Take 5.0 g of the obtained Ni-Ca-loaded dry material and heat it on a fixed bed at 800 °C for 60 min under an inert atmosphere with a nitrogen flow rate of 150 ml / min. The solid product obtained by pyrolysis is carbon nanotube / porous carbon material. The gas obtained by pyrolysis is purified by 5000 ml of 0.002g / ml calcium hydroxide solution (th...

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Abstract

The invention discloses a method for jointly preparing a carbon nanotube/porous carbon material and hydrogen-rich synthesis gas through biomass pyrolysis, which comprises the following steps: (1) washing and drying corn straw powder to remove redundant impurities for later use; (2) dipping the obtained corn straw powder in a mixed aqueous solution of NiCl2 and CaCl2, fully stirring to enable the corn straw powder to be fully contacted with the mixed aqueous solution of NiCl2 and CaCl2, and drying to obtain a Ni-Ca loaded dry material; and (3) in a nitrogen atmosphere, heating and pyrolyzing the Ni-Ca loaded dry material in an inert atmosphere to obtain the carbon nanotube/porous carbon composite material. The gas generated by pyrolysis is purified with a calcium hydroxide solution to obtain hydrogen-rich synthetic gas. According to the method, the carbon nanotube/porous carbon material and the hydrogen-rich synthesis gas can be obtained at the same time, the comprehensive utilization efficiency of biomass pyrolysis products is improved, and a new way is provided for high-value utilization of biomass resources.

Description

technical field [0001] The invention belongs to the technical field of biomass resource utilization, and in particular relates to a method for jointly preparing carbon nanotubes / porous carbon materials and hydrogen-rich synthesis gas by pyrolysis of biomass. Background technique [0002] Biomass energy is an abundant, clean and renewable energy resource with important development and utilization value. The development and utilization of biomass energy can effectively alleviate the increasingly serious environmental pollution and energy shortage problems. Pyrolysis is an effective way to utilize biomass energy, which can convert biomass into solid, liquid and gas three-phase products with high added value. Solid products often have high pyrolysis and developed pore structure, and are often used as fuel and activated carbon precursor materials. When used as activated carbon precursor materials, further activation is required, which increases the cost of utilization; liquid pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/162C01B32/318C01B3/02
CPCC01B32/162C01B32/318C01B3/02
Inventor 董庆杜洋孙振杰黄思思王朝宇张金峰时号李红艳郭依峰庞任泽王凯孟中玺李相前罗楚平
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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