NOTE:
After further investigation into the producer I found out that granules are made of 100% coconut shell whereas pellets of 100% hard coal.
This renders this question meaningless.
Apologies for the inconvenience and thank you for the knowledgeable and enriching answers.
I'm looking for activated charcoal for my water distiller and I found a producer offering both granules and pellets made of steam activated carbon from hard coal and coconut shells.
Considering the similar grain size / diameter, I'm surprised to find out that the two have opposite properties.
The following is a table provided by the retailer:
Granules Pellets
Wastewater - water purification ✓ ✓
Inorganic chemicals ✓
aquarium water ✓ ✓
chlorine / ozone ✓
Discoloration / Toxins ✓
Electroplating ✓
Organic Chemicals ✓
Drinking water treatment ✓ ✓
Summary, as I understand it:
Granules let go inorganic and organic chemicals stop chlorine and ozone
Pellets stop inorganic and organic chemicals let go chlorine and ozone
This is a trade off that I'm obviously not willing to settle with, I just would like to drink CLEAN water.
I'm considering mixing granules and pellets in order to avail of both properties, if that could possibly work.
I would like to know why granules and pellets made of the same material have such differences.
I'd also be glad to have an advice on which one may be best for water distiller.
Here are the specifications of both products:
Granules Pellets
Grain size / diameter 0,6 - 2,36mm Ø1,5mm
Bulk density 500 +/- 30kg/m³ 530 +/- 30kg/m³
Water content at packing <5% <5%
Iodine value >1050 mg/g >900 mg/g
CCI4 - Adsorption n.V. >60%
Specific surface area (BET) ca. 1100m²/g ca. 1050m²/g
Ash content <5% n.V.