A process for the preparation of high-quality activated carbon and co-production of synthesis gas by multi-effect series negative pressure pyrolysis

Abstract

The invention belongs to the technical field of carbon material preparation, and provides a process for preparing high-quality activated carbon co-production synthesis gas by multi-effect series negative pressure pyrolysis, including a main activation reactor, a first-stage de-insertion device, a second-stage de-insertion device, three Stage removal device, negative pressure device, gas purification device and gas storage device. Utilize the physical adsorption of the intercalation agent's own pores and the chemical action of surface functional groups to capture metal potassium and pyrolysis gas in situ, and at the same time, it is continuously pre-activated under the action of high-temperature pyrolysis gas and metal potassium cross-layer to create the original pore size for activation. Facilitate the continuous infiltration of activator molecules along the pores. The invention provides an effective solution for solving the strong corrosive problem in the process of preparing activated carbon by alkaline activation; at the same time, it avoids the use of inert protective gas and reduces production costs; it recycles and utilizes pyrolysis gas containing a large amount of greenhouse gases to reduce its impact on the atmospheric environment. hazards. It has broad market prospects and environmental benefits.

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...

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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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