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                     .... 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. 

 

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..........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

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.

For odor 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.

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