Spherical activated carbon with high compressive strength and its preparation method and use

Abstract

The invention provides spherical active carbon with high compression strength and a preparation method and applications thereof. According to the preparation method, the temperature of the sulfonationphase is maintained in a range of 200 to 350 DEG C, spherical polymer with a median size (D50) of 0.10 to 2.5 mm is taken as the raw material, spherical active carbon with a small size and a median size (D50) of 0.05 to 2.0 mm can be prepared, the yield is good, the cost is low; and the prepared spherical active carbon has high compression strength, which can reach 85 to 300 N. Compared with conventional active carbon, the spherical degree of provided active carbon is higher, and the hollow structure is better. Moreover, in the sulfonation phase, the heating is carried out in a gradient temperature rising mode to greatly reduce the generation rate of semispherical balls, and the cracking rate is reduced. The provided active carbon has excellent physical or mechanical characteristics, prominently reduced cracking rate, and excellent adsorbing performance, and is capable of adsorbing harmful gas efficiently.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, in particular to a spherical activated carbon with high compressive strength, its preparation method and application. Background technique [0002] Activated carbon has broad non-specific adsorption properties and is therefore the most widely used adsorbent. Activated carbon is generally obtained by carbonization, followed by activation, of carbon-containing starting compounds, preferably such compounds which give economically reasonable yields. This is because the weight loss due to the departure of volatile components during carbonization and subsequent burnout during activation is significant. [0003] Due to different processes, activated carbon can be used in different forms, such as powdered carbon, flake carbon, granular carbon (Kornkohle), shaped carbon (Formkohle) and spherical activated carbon that have been used since the end of the 1970s. [0004] Spherical activated ca...

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Problems solved by technology

However, when using the existing process to prepare spherical activated carbon, there are still many defects

For example, in the actual production, it is difficult to obtain a larger particle size spherical activated carbon while obtaining satisfactory pore size and strength characteristics in the actual production, and the practical application range is greatly limited.

Moreover, the existing technology is difficult to realize the synergy between parameters such as particle size, sphericity, cracking rate and adsorption performance of spherical activated carbon.

Further, the existing preparation method of spherical activated carbon has high energy consumption, which is not conducive to technological production

Similarly, for spherical activated carbon with smaller particle size, there is also a situation where the particle size and other parameters cannot be coordinated to achieve the optimum

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