Method for preparing high specific surface area granular activated carbon by physical activation process

Abstract

The invention provides a method for preparing grain active carbon with high specific surface area by a physical activation method, comprising the steps as follows: firstly, coconut shell is carbonized under high temperature; subsequently, the crushed and screened carbonization material is arranged in a microwave radiation device; by controlling activation temperature and adjusting activation time and activation gas flux, the raw material is activated so as to gain the grain active carbon product with the specific surface area more than 2200m<2> / g. The method utilizes high-temperature carbonization to improve the micro-pore structure of the carbonization material of the coconut shell, is beneficial for improving the orderly structure of the carbonization material of the coconut shell, reduces the burning of the carbon during the carbonization process and improves the yield of the active carbon product; the prepared active carbon is the grain active carbon, and the applicable range is improved.

Description

1. Technical field [0001] The invention relates to a method for preparing granular activated carbon with a high specific surface area by a physical activation method, and belongs to the technical field of material preparation. 2. Background technology [0002] Activated carbon is a kind of porous carbon material, which has a wide range of applications in the fields of chemical industry, environmental protection, metallurgy, electronics and energy. In recent years, with the development of science and technology, the application field of activated carbon has continued to expand, and new and higher requirements have been put forward for the adsorption performance. Under the general requirements of "high adsorption, multi-function, high strength", special-purpose The demand for activated carbon is increasing. At present, activated carbon with high specific surface area is usually prepared by chemical activation method, and 2000m 2 Activated carbon with a high specific surface ...

AI Technical Summary

Problems solved by technology

In the patent No. 200510010669.X, a method of "physically treating tobacco rod waste to make activated carbon" is disclosed. The tobacco rod is used as raw material and water vapor is used as the activation gas. Although the required time is relatively short, its The product can only meet the requirements of commonly used activated carbon products, far from the application requirements of electrodes, hydrogen storage, methane storage and other fields of electric double layer capacitors, and the yield is also low (less than 30%)