Air Purification Carbon

The structure of air purification activated carbon is relatively complicated, composed of planar layer of arranging in hexagonal carbon atoms, these planes are not arranged entirely along the common vertical axis, but layer and layer with an angular displacement, is messy and irregular, such a structure called the "whorl like structure". In the process of activation, all kinds of carbon compounds and disordered carbon between basic microcrystalline are cleared, created a space, the accumulations of remaining carbon are quite loose, but the mutual coupling is quite strong.Therefore between crystallite have many spaces with different shape, size and certain strength. According to the aperture size these spaces are generally divided into big pore, mid-hole and micropore. 90% specific surface area of activated carbon comes from micropore, its specific surface area can reach more than 1000m2/g, and pore volume also is large, so micropore is an important factor decided adsorption performance of air purification activated carbon. The adsorption characteristics of activated carbon depend on its pore structures and the surface chemical properties, and surface chemical properties determine the chemical adsorption of active carbon. Activated carbon for gas adsorption includes physical adsorption and chemical adsorption, generally both been accompanied by simultaneous. Physical adsorption simply via attractive forces between molecules adsorbs adsorbate on the surface of the adsorbent. Physical adsorption is reversible, reducing adsorbent partial pressure in the gas phase, increasing the adsorption temperature, adsorbent quickly desorption, without changing its chemical composition. Chemical absorption has high selectivity, and a kind of adsorbent only has the effect to the specific substance. Chemical adsorption is irreversible, after adsorption adsorbent has changed the original characteristics. Air purification activated carbon has big specific surface area, abundant pore s....

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