Yuanying Industry Limited

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 1000m2g, 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.

Yuanying activated carbon has high mechanical strength, quick adsorption speed, big adsorption capacity, large specific surface area, rich pore structure, strong decolorization capacity, special electronic properties, easy to regulate surface groups, strong acid-resistant, alkali-resistant and heat-resistant properties.According to users requirements, different production methods are applied such as chemical method, physical method, chemical-physical or physical-chemical method.The most common use of activated carbon is air purification, water treatment, catalyst carrier.Air purification activated carbon is made of wood, coal or coconut shell, granular or cylindrical appearance. For air purification, the best is coconut shell. It can efficaciously adsorb methanol, ammonia, radon, benzene, xylene, exhaust gas, lampblack, especially aromatic compound.The raw materials of water treatment activated carbon have coconut shells, walnut shell, apricot, peach shell, wood, coal and so on, the coconut shell activated carbon is considered the best water treatment activated carbon. Water treatment activated carbon has powder, granule and columnar, among them granule is the most widely used. The smaller granularity, the faster absorption, but head loss increases, usually in 8-30 mesh is better.Activated carbon as catalyst carrier also can be directly as catalyst. As a carrier, mainly used to support catalyst, lets catalyst load on its surface and makes it possess certain physical and chemical property, carrier itself generally does not have catalytic activity.