Preparation method of active carbon based on cellulose aerogel, and applications thereof

Abstract

The invention discloses a preparation method of active carbon based on cellulose aerogel. The preparation method comprises following steps: air-dried corn leaf and corn skin are collected via peeling, and are subjected to shearing, mixing, grinding, and sieving so as to obtain a qualified raw material; the qualified raw material is subjected to hydrogen peroxide / potassium hydroxide treatment so as to obtain corn biomass cellulose; the corn biomass cellulose is subjected to swelling via low temperature sodium hydroxide / urea method, and is subjected to heating to realize gelatinization, and low temperature liquid nitrogen treatment is carried out so as to prepare a cellulose aerogel; the cellulose aerogel is subjected to segment heating carbonization drying in nitrogen, and high temperature activation of the processed cellulose aerogel with carbon dioxide is carried out, so that the carbonaceous adsorbent with relatively large specific surface area and pore volume is obtained. The active carbon prepared via the preparation method possesses a black large particle structure, and possesses relatively high adsorption capacity on carbon dioxide.

Description

technical field

[0001] The invention relates to a method for preparing and absorbing carbon dioxide (CO 2 ) technology of granular activated carbon, which belongs to the technical field of natural polymer modified materials. Background technique

[0002] Currently CO 2 The greenhouse effect caused by CO has become a global environmental problem. 2 Capture, utilization and storage is the key to controlling CO 2 Effective means of emission has become a hot spot for efficient and clean utilization of fossil energy. CO 2 capture is to achieve CO 2 The premise of utilization and storage, the development of high-efficiency and low-cost CO 2 Capture technology has become the focus of current research. Capture CO 2 The methods mainly include solvent absorption method, membrane separation method, cryogenic method, adsorption method, etc. [1] . Among them, the adsorption method has the advantages of simple process, low energy consumption, good stability, high operating flexi...