Preparation method of activated carbon

Abstract

The invention provides a method for preparing activated carbon by degraded residues of straw-type lignocellulose, which comprises the following steps: 1) processing straw-type lignocellulose by an alkali method; 2) processing the residues obtained in step 1) by enzyme hydrolysis; and 3) performing activation to the enzyme hydrolyzed residues obtained in step 2) by a chemical activator under a high temperature condition to prepare an activated carbon product. In the method provided by the invention, the sugar solution obtained after the pretreatment of the lignocellulose raw material by the alkali method and the enzyme hydrolysis is applicable to the preparations of bio-fermentation products such as alcohol, citric acid, xylitol, and the like; the enzyme hydrolyzed residues is applicable to the preparation of activated carbon; the utilization ratio of the raw material is increased, and the method has considerable economic and social benefits.

Description

technical field

[0001] The invention belongs to the technical field of biochemical industry, and in particular relates to a method for preparing activated carbon by using straw-like lignocellulose degradation residues. Background technique

[0002] Lignocellulose resources widely exist in nature, and as a renewable resource, it can be used in chemical or energy fields. However, so far, the utilization rate of lignocellulosic resources is still quite low, and only a small part is used as raw material for papermaking, feed and preparation of chemicals. The traditional way of utilizing lignocellulose resources is relatively simple. In addition to returning to the field, the main ways of utilization are combustion, gasification and hydrolysis.

[0003] Activated carbon products can be prepared from lignocellulosic resources. For example, using corncobs to prepare furfural will produce a large amount of residues. If these residues are not properly treated, it will not only poll...