The steam activated process is done by activating the charcoal in a rotary kiln by heating at high temperatures by steam. The activated carbon that comes out from the kiln is called unwashed activated carbon. These unwashed activated carbon has higher ash and iron content. This is reduced by washing the unwashed activated carbon with acid (HCl / H2SO4) and purified water. This results in reduction of ash content to as low as 1% and iron as low as 50 ppm.
The gradation of different qualities of activated carbon is done on the basis of Methylene blue value and iodine value. The iodine value is a better test as the particle size of iodine molecule is small enough to penetrate the smallest of pores. We can relate the iodine value of activated carbon directly to its surface area because of the above fact.
Given below are our standard technical specifications of our different washed and unwashed grades of steam activated carbon. You are requested to select your grade and let us know of your requirement.
Technical Specification of Activated Carbon (Unwashed grade)
| Properties | Grade | |||
|---|---|---|---|---|
| BDC-A | BDC-B | BDC-C | BDC-D | |
| Methylene Blue Value min (mg/gm) |
200 | 250 | 300 | 350 |
| Iodine Value min (mg/gm) |
750 | 800 | 900 | 900 |
| Moisture (%) Max | 5 | 5 | 5 | 5 |
| ph | 9 | 9 | 9 | 9 |
| Ash (%) Max | 7 to 10 | 7 to 10 | 7 to 10 | 7 to 10 |
| Ironppm Max | 150 | 100 | 100 | 100 |
| Acid Soluble Matter (%) | 2 | 2 | 2 | 2 |
| Water Soluble Matter (%) | 2 | 2 | 1.5 | 1.5 |
| Particle Size through 200 mesh (%) | 90 | 90 | 90 | 90 |
Technical Specification of activated carbon (Acid washed)
| Properties | Grade | |||
|---|---|---|---|---|
| BDC-A | BDC-B | BDC-C | BDC-D | |
| Methylene Blue Value min (mg/gm) |
200 | 250 | 300 | 350 |
| Iodine Value min (mg/gm) |
750 | 800 | 900 | 900 |
| Moisture (%) Max | 5 | 5 | 5 | 5 |
| ph | 6.5 - 7.5 | 6.5 - 7.5 | 6.5 - 7.5 | 6.5 - 7.5 |
| Ash (%) Max | 4 | 3.5 | 1.5 | 1.25 |
| Ironppm Max | 150 | 150 | 100 | 70 |
| Acid Soluble Matter (%) | 2 | 1 | 0.5 | 0.5 |
| Water Soluble Matter (%) | 1.5 | 0.8 | 0.2 | 0.1 |
| Particle Size through 200 mesh (%) | 90 | 90 | 90 | 90 |
Applications of Steam Activated Carbon Powder :
- It is mainly used in the decolorisation of active pharmaceutical ingredients.
- Decolorisation of plasticizers, drugs intermediates, dyes and dye intermediates, food colors, glycerine and fine chemicals.
- Used also as a drug in capsules and tablet forms for stomach ailments and applications.
- Used to purify intravenous fluid and injections.
- Used by the pesticides and insecticides industry for decolorisation.