The pores of activated carbon can be divided into three categories according to the pore size.
Large hole: radius 1000-1000000 A.
Transition hole: radius 20-1000 A.
Micro hole: radius-20 A.
Activated carbon made from different raw materials has different pore sizes. Activated carbon made from coconut shell has the smallest pore radius. Wood activated carbon generally has the largest pore radius, they are used to adsorb larger molecules, and they are almost exclusively used in the liquid phase.https://www.chinactivecarbon.com/products/coconut-carbon-gold.html
Activated carbon can be made of many kinds of carbonaceous materials, including wood, sawdust, coal, coke, peat, lignin, fruit core, hard nut shell, sucrose pulp, bone, lignite, petroleum residue, etc. Among them, coal and coconut shells have become the most commonly used raw materials for making activated carbon. The production of activated carbon is basically divided into two processes. The first process includes dehydration and carbonization. The raw materials are heated and dried at a temperature of 170 to 600°C, and approximately 80% of the original organic matter is carbonized.
The second process is to activate the carbonized material, which is completed by the reaction of activator such as water vapor and carbon. In the endothermic reaction, a mixed gas composed of CO and H2 is mainly generated to extinguish and heat the carbonized material to an appropriate temperature (800 To 1000℃), to burn out all the synthesizable substances in it, resulting in a prosperous microporous structure and a large specific surface area, so it has a strong adsorption ability.
The first type of granular activated carbon used in the field of urban water supply treatment is made of wood, called charcoal. The pore size of coal activated carbon is somewhere in between.
Among coal-based activated carbons, lignite activated carbons have more transitional pores and larger uniform pore diameters than anthracite activated carbons, so they can effectively remove macromolecular organics in water. Activated carbon commonly used in water treatment does not necessarily have a large surface area, but it should have more transitional pores and a larger uniform pore size.https://www.chinactivecarbon.com/
Large hole: radius 1000-1000000 A.
Transition hole: radius 20-1000 A.
Micro hole: radius-20 A.
Activated carbon made from different raw materials has different pore sizes. Activated carbon made from coconut shell has the smallest pore radius. Wood activated carbon generally has the largest pore radius, they are used to adsorb larger molecules, and they are almost exclusively used in the liquid phase.https://www.chinactivecarbon.com/products/coconut-carbon-gold.html
Activated carbon can be made of many kinds of carbonaceous materials, including wood, sawdust, coal, coke, peat, lignin, fruit core, hard nut shell, sucrose pulp, bone, lignite, petroleum residue, etc. Among them, coal and coconut shells have become the most commonly used raw materials for making activated carbon. The production of activated carbon is basically divided into two processes. The first process includes dehydration and carbonization. The raw materials are heated and dried at a temperature of 170 to 600°C, and approximately 80% of the original organic matter is carbonized.
The second process is to activate the carbonized material, which is completed by the reaction of activator such as water vapor and carbon. In the endothermic reaction, a mixed gas composed of CO and H2 is mainly generated to extinguish and heat the carbonized material to an appropriate temperature (800 To 1000℃), to burn out all the synthesizable substances in it, resulting in a prosperous microporous structure and a large specific surface area, so it has a strong adsorption ability.
The first type of granular activated carbon used in the field of urban water supply treatment is made of wood, called charcoal. The pore size of coal activated carbon is somewhere in between.
Among coal-based activated carbons, lignite activated carbons have more transitional pores and larger uniform pore diameters than anthracite activated carbons, so they can effectively remove macromolecular organics in water. Activated carbon commonly used in water treatment does not necessarily have a large surface area, but it should have more transitional pores and a larger uniform pore size.https://www.chinactivecarbon.com/
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