What are the physical properties of coconut shell activated carbon? Let's take a look at it. First, let's talk about the price of coconut shell activated carbon in Beijing. The iodine value of coconut shell activated carbon determines the price of coconut shell activated carbon. Beijing coconut shell The market price of activated carbon 900 iodine value is around 8,500, and the price of iodine value of 1000 or more is above 9,500.
Coconut shell activated carbon is a multi-aperture charcoal. Coconut shell activated carbon has a very rich pore structure. Coconut shell activated carbon has good adsorption characteristics. The adsorption of coconut shell activated carbon is formed by physical and chemical suction. The color is black.
In addition to the main carbon, its composition contains a small amount of hydrogen, nitrogen, oxygen, and its structure looks like a hexagon. Due to the irregular hexagonal structure, it is determined by its large body and high surface area. The characteristic is that each gram of coconut shell activated carbon has a specific surface equivalent to 1000 square meters.
Application of Beijing coconut shell activated carbon in waste gas treatment:
1. Granular activated carbon is often used in gas phase adsorption, usually by allowing gas to pass through the activated carbon layer for adsorption. According to the state of the activated carbon layer in the adsorption device, the adsorption layer has several fixed layers, a moving layer and a flowing layer. However, in small adsorbers such as electric frosts and deodorizers in automobiles, adsorption by gas convection and diffusion is performed. In addition to granular activated carbon, activated carbon fibers and activated carbon moldings are also increasingly being used in gas phase adsorption.
2. The air in the instrument room, air-conditioned room, basement and submarine facilities often contains body odor, smoking odor, cooking odor, oil, organic and inorganic sulphide, corrosive ingredients due to external pollution or the influence of crowd activities in a closed environment. Etc., causing corrosion of precision instruments or affecting human health. It can be purified by activated carbon to remove impurity components.
3. Chemical plants, tanneries, paint factories, and engineering gases using various organic solvents contain various organic solvents, inorganic and organic sulfides, hydrocarbons, chlorine, oil, mercury, and other environmentally harmful The ingredients can be discharged after adsorption with activated carbon. The gases emitted from the atomic energy facilities contain radioactive cesium, strontium, iodine, etc., which must be adsorbed with activated carbon before being discharged. The flue gas generated by the combustion of coal and heavy oil contains sulfur dioxide and nitrogen oxides, which are harmful components that pollute the atmosphere and form acid rain. They can also be adsorbed and removed by activated carbon.
4. There are many use cases of coconut shell activated carbon for refined gas, such as gas masks, cigarette filters, refrigerator deodorizers, automobile exhaust gas treatment devices, etc., all of which utilize the excellent adsorption performance of activated carbon to make the toxic components in the gas unfavorable to the human body. The ingredients or odorous ingredients are removed. For example, by adding 100 to 120 ng of activated carbon to a cigarette filter, a large portion of the harmful components of the smoke can be removed.
Attention method in the transportation of coconut shell activated carbon
When the coconut shell activated carbon is stored or transported, it should be prevented from direct contact with the fire source to prevent the fire and the regeneration of the activated carbon from avoiding oxygen and regenerating thoroughly. After the regeneration, it must be cooled to below 80 °C by steam, otherwise the temperature is high, and the oxygen is activated. Self-ignition.
During the transportation process, the coconut shell activated carbon is prevented from being mixed with hard substances, and it is not allowed to step on and step to prevent the carbon particles from being broken and affecting the quality.
To prevent the tar-like substances from being used in the process of using tar, the tar-like substances should be prohibited from being carried into the activated carbon bed to avoid blocking the voids of the activated carbon and causing the adsorption to be lost. It is best to have a decoking device to purify the gas.
The relationship between the specific gravity of the activated carbon and the specific surface area, the total change of the mmWm capacity of the activated carbon with the increase of the specific surface area is small, possibly due to the increase of the specific product, the density of the activated carbon microspheres decreases, resulting in volume specific capacity. reduce. Similar to the mass specific capacity, the relationship between the volume specific capacity of activated carbon microspheres and the specific surface area is not proportional. Some samples have abnormal trends, which may also be due to the influence of other factors on the volumetric capacity of these samples. Caused by.
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