|
As a leading master distributor of activated carbon, granular
activated carbon, and liquid phase activated carbon, Res-Kem Corp. has vast experience is helping customers in selecting the best carbon to use with their equipment and application.
Unlike many distributors, Res-Kem manufactures activated carbon filters and has engineers and activated carbon
specialists on staff to assist you in the selection of the best carbon for your application, regardless of your industry.
This Carbon Selection Chart below captures a lot of that information, but we would also encourage you to contact us if you need assistance.
We are a stocking distributor for Calgon, Jacobi, Norit and our own Res-Karb brand activated
carbon. All products meet or exceed AWWA B100 and are listed under NSF Standard 61.
Carbon Selection Chart
| Application |
Comments |
Product |
Taste and Odor
Chlorine Removal
Low Level Organics |
Carbon reacts with chlorine; it is not absorbed. Iodine number not relevant. Use on city supplies and chlorinated well water for taste and odor. |
CL1240
JCL1240
F-200
GAC40S |
| Pre-Filtration to Demineralizers, Softeners, etc. |
Strictly dechlorination |
JCL1240
F-200 |
| Pre-Filtration to Demineralizers, Softeners, etc. |
Organics loading |
F-300/F-400
GAC40S
JCL1240 |
| Ultra Pure |
Coconut-based carbon ahead of RO. If pH is critical, use acid washed. |
CS-1240
CPG-LF
GAC-1240+
AQUASORB 2000 |
| Hydrogen Sulfide |
Use carbon with enhanced catalytic sites. In extreme cases, add chlorine or peroxide. |
CENTAUR |
Low Level VOCs
Gasoline
Benzene
Toluene
TCE |
Do not backwash with untreated water to avoid fouling bed. These molecules are best adsorbed by carbons with a high iodine number. |
F-300/F-400
GAC830/1240
JCL1240 |
High Level VOCs
Gasoline
Benzene
Toluene
TCE |
Same as above for Low Levels, plus: Use more or larger tanks as flow requires. Longer contact times are necessary. |
F-300/F-400
GAC830/1240
JCL1240 |
| Color Removal |
Color molecules are large and best adsorbed by carbons with high molasses numbers (lignite). |
DARCO 1240 |
| Chloramine |
Carbon with enhanced catalytic sites works 2 to 3 times better than standard carbon. |
CENTAUR |
| THM |
These molecules are small so coconut carbon works well in this application. Consider contaminants when applying. |
CS-1240 |
| MTBE |
Found in well water supplies, MTBE is a gasoline additive and known carcinogen. |
F-600 |
| Kidney Dialysis |
Watch for pH shifts; acid washed usually preferred. Where chloramine is present, consider CENTAUR. |
CPG-LF
CENTAUR |
Disclaimer for Carbon Selection Chart
All suggestions and recommendations above concerning the use of activated carbon are based on our
experience and currently available reliable data. As Res-Kem cannot control the use of these products by others,
no guarrantee is either expressed or implied by any suggestion or recommendation by Res-Kem, nor is any information
contained in this page to be construed as a recommendation to infringe any currently valid patent.
Notes on Carbon Selection Chart
- Vigorous backwashing of the bed after installation is recommended. This will remove fines and more importantly,
will reclassify the bed according to particle size. If this classification doesn't take place right away,
you risk mixing exhausted carbon with the good carbon each time you backwash. Consult Res-Kem for more
details on these applications.
- The capacity of activated carbon to remove specific sbustances and mixtures depends on the nature
of the specific chemical compounds, their concentration, conditions of adsorption (temperature, pressure, contact time, etc.),
and how the activated carbon is applied to the problem. In order to provide contact times and usage rates,
Res-Kem would need a full water analysis.
- What carbon cannot do: water softening, bactericidal treatment, desalinating, heavy metals removal.
Raw Materials Used to Manufacture Activated Carbon
The following raw materials are used in the manufacture of activated carbon:
- Bituminous Coal - This coal has both large and small pores and is a good general purpose carbon for this reason.
Coal is easy to reactivate and is good for chlorine removal. Coal-based activated carbon may be imported. Imported carbons may be inconsistent in quality -
a typical complaint is excessive dust. Res-Kem only supplies the highest grade of imported carbon.
- Lignite Coal - Lignite is a soft wood-based carbon and very light in density. It has a low iodine number and a high molasses number. Use lignite coal in
applications requiring large pores, for example, in color removal. High attrition when reactivated. Good for chlorine removal.
- Coconut - Coconut is the hardest and least dusty of all the base materials. It has the highest
iodine number and is good for small or low molecular weights. Because it is imported and quality varies, Res-Kem carefully screens the product berfore stocking and reselling to you.
Price may vary due to growing conditions.
Downloads and Technical Information on Carbon
Click Here for detailed information and downloadable PDF files regarding activated carbon.
Contact Res-Kem Corp. - Your Carbon Selection Experts
Click Here to Contact Res-Kem for further assistance with all of your carbon
selection needs.
|
Supplies
