.... Activated Carbon Technical Design Considerations
Activated carbon can be made from various raw material such as coconut, coal, coal pitch, wood, and synthetic resin etc. During activation, various techniques are employed to control pore size, pore volume and the pore wall structure. Additionally, activated carbon can be treated in various solutions to enhance its performance and finally place it in appropriate shape and sizes.
..........If material safety data sheets are needed, please proceed below. If further explanation of terminology is needed, please proceed below.
In order to select appropriate activated carbon for your use, many factors needed to be considered. Some parameters are not so obvious such as raw material used and some parameters are obvious such as the final shapes desired. Other parameters are not readily visible such as the surface area characteristics and pore size distributions, yet these parameters have significant impact on the performance you wish to achieve.
Classified by Raw material used Classified by final shapes and states
* Coal Based * Powder * Suspended in liquid
* Coconut Based * Granular * Paste
* Wood Based * Pallets * Adhered to Non-woven fiber
* Oil Based * Bonded & Shaped * Carbon Blocks
* Phenol Resin Based * Fiber
* Rayon Based * Woven Cloth
* Coal Pitch Based
Classified by pore size volume ....... Classified by pore size distribution
If micro pore sizes are too small compared to the target gas molecule size you wish to capture, little adsorption will take place. If pore sizes are too large for the gas, again it is difficult to capture the target gas at low concentration. If pore sizes are matching to the target gas molecular size, adsorption will take place at relatively low concentration level. Activated carbon regularly contains micro pores smaller than 20 angstroms. The pore size distribution is represented by pore size distribution curve as an example is shown above.
Adsorption enhancement by various activated carbon treatments
Activated carbon performance can be further enhanced by use of catalyst as well as treating the carbon by various chemical solutions to fine tune the adsorption characteristics of certain gases and liquids. For catalytic use in activated carbon, Pt, Pd, Rh often used.
|Products||Carbon Treatment||Taget Gases/Bacteria||Gas Examples||Typical Applications|
|T-B||Phosphoric acid||acidic gases||ammonia, trymethylamine||Odor Gas Removal(Home Use)|
|T-A||Potassium carbonate||acidic gases||hydrochloric acid||Odor Gas Removal|
|T-S||Silver||Anti-bacteria||-||Water Purification Filter|
|T-F||Aniline||alkaline gases||acetaldehyde, formaldehyde||Odor Gas Removal|
|T-E||Palladium||ethylene gases||ethylene||To keep fruit/Vegitable Fresh|
|T-C||Bromine||neutral gases||methyl chloride||Odor Gas Removal|
|T-BFU||Ethylene urea/Phosphoric acid||alkaline/acidic gases||ammonia, acetaldehyde||Odor Gas Removal(Home Use)|
Activated carbon performance can be enhanced by additives as in the case of lead removal property of APG/ARG in liquid.
For more information on liquid phase and its products, please refer to LIQUID PHASE TECHNICAL INFORMATION .
For water purification applications, please visit NSF certified PGW carbons and for carbon block products, please visit PMC blocks.
Forodor gas removal design calculations, please visit: ODOR GAS DESIGN - PDF File (486K)
For specialized gas separations (molecular sieving) , please visit: N2 Gas Separation GN
For technical information on high surface area activated carbon for super capacitor design, please refer to YP-50F & YP-80F carbon.
For simple manufacturing process descriptions, please visit at manufacturing process description page.