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Process for preparing high-quality activated carbon and co-producing synthesis gas through multi-effect series negative pressure pyrolysis

A kind of activated carbon, high-quality technology, applied in the direction of gasification process, petroleum industry, carbon compounds, etc., to achieve the effect of reducing the consumption of activator, improving the utilization efficiency and simplifying the process

Active Publication Date: 2020-07-17
DALIAN UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Chinese patent document CN104163427A discloses a method for preparing activated carbon by two-step activation of molten salt, which can effectively control the waste of chemical reagents due to volatilization, but does not effectively process and utilize metal potassium vapor and pyrolysis gas.
Chinese patent document CN110171829A discloses a method for preparing activated carbon by using sludge fermentation residues. Water vapor and carbon dioxide mixed gas are introduced as the reaction medium to couple potassium hydroxide and sodium hydroxide for strong alkali joint activation to prepare activated carbon. Although this method avoids nitrogen, The use of protective gas such as argon, but still need to add a separate gas source

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  • Process for preparing high-quality activated carbon and co-producing synthesis gas through multi-effect series negative pressure pyrolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Take 100g of industrial papermaking black liquor lignin as the carbon precursor, and use potassium hydroxide and potassium oxalate mixed salt as the activator, and add the two into the activation reactor under the condition that the mass ratio of the activator to the carbon precursor is 0.5:1 , for mechanical grinding. Fill 200g of industrial papermaking black liquor lignin into the first-stage de-insertion device, the second-stage de-insertion device and the third-stage de-insertion device as a de-interpolation agent, and start the negative pressure device to activate the main activation reactor, the first-stage de-insertion device, the second-stage de-insertion device, etc. The first-stage de-insertion device and the third-stage de-insertion device are vacuumized. Set the microwave heating power to 600W, the heating time to 300s, heat the main activation reactor, turn on the negative pressure device, set the negative pressure to -5KPa, and introduce the metal potassiu...

Embodiment 2

[0030]With 100g industrial petroleum coke as the carbon precursor, potassium hydroxide and potassium citrate mixed salt as the activator, under the condition that the mass ratio of the activator to the carbon precursor is 1:1, the two are added to the activation reactor to carry out mechanical grinding. Fill 100g of petroleum coke into the first-stage de-insertion device, second-stage de-insertion device and third-stage de-insertion device as a de-interpolation agent, start the negative pressure device to activate the main activation reactor, the first-stage de-insertion device, and the second-stage de-insertion device Vacuumize with the three-stage detachment device. Set the microwave heating power to 800W, the heating time to 120s, heat the main activation reactor, turn on the negative pressure device, set the negative pressure to -10KPa, and introduce the metal potassium vapor and pyrolysis gas generated during the pyrolysis activation process into the first stage degasser....

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Abstract

The invention belongs to the technical field of carbon material preparation, and provides a process for preparing high-quality activated carbon and co-producing synthesis gas by multi-effect series negative pressure pyrolysis. An adopted device comprises a main activation reactor, a primary de-intercalation device, a secondary de-intercalation device, a tertiary de-intercalation device, a negativepressure device, a gas purification device and a gas storage device. Metallic potassium and pyrolysis gas are captured in situ by utilizing the physical adsorption effect of pores of a de-intercalation agent and the chemical effect of surface functional groups, and meanwhile, the de-intercalation agent is continuously pre-activated under the action of high-temperature pyrolysis gas and metallic potassium penetrating layers to create an original pore diameter for activation, so that activating agent molecules can continuously permeate along the pores. The invention provides an effective schemefor solving the problem of strong corrosivity in the process of preparing activated carbon by alkaline activation; meanwhile, the use of inert protective gas is avoided, and the production cost is reduced; pyrolysis gas containing a large amount of greenhouse gas is recycled, and harm of the pyrolysis gas to the atmospheric environment is reduced. Wide market prospects and environment benefits are realized.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation, and in particular relates to a green preparation process for synchronously co-producing syngas by multi-effect series preparation of activated carbon with high specific surface area. Background technique [0002] At present, the global annual demand for activated carbon is as high as 1.6 million tons, especially the demand for activated carbon with high specific surface area is increasing year by year. Activated carbon with high specific surface area is widely used in many energy fields such as energy storage, catalysis, adsorption and gas separation. Common activated carbon preparation methods include: physical activation method, chemical activation method, physical-chemical combined activation method. In order to prepare activated carbon with rich pore size and high specific surface area, strong alkali chemical activation method is often used, but it has the problem of high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C10J3/46
CPCC01B32/348C10J3/46C10J2300/0906
Inventor 高原李爱民王欣张雷姬国钊赵紫宁
Owner DALIAN UNIV OF TECH