Density - Very Important Parameter

You look at technical specification of most of the manufacturer of activated  carbon and they say apparent density is in some range. For example in the range of 450 - 550 gm/liter.

Now, most of the time, we buy activated carbon by weight (in kilograms or pounds) but in actual, we use it to fill carbon filter. It means we need to fill specific volume (in Liters or Cubic Feet).

Density is a measure to convert kilograms into Liters and vice versa. For example, if your activated carbon has density of 500 gm/liter then 1 liter of activated carbon equals 500 gm.

Now say, one time, you purchased 1000 Kg of activated carbon at X price and density is 450 gm/liter. So at X price you can get (1000/0.45=) 2222 Liters of activated carbon. Now another time, you got carbon at the same X price but now density is 550 gm/liter so you will get (1000/0.55=) 1818 Liters of carbon. So if you are using this carbon to fill carbon filter than you will get nearly 22% less carbon so keeping the same price or even reducing it by 10% makes you in total loss if density is higher.

Now, many of us buy carbon in cubic feet and feels that they do not have to bother because they are already buying in volumes. For them also, be informed that most of the companies manufacture carbons at different locations and all the factories do not have facility to fill bags by volume so based on their preset density of 450 gm/liter or other standards they fill the bags with    required kilogram. It means in actual, they fill the bags based on Kilograms and not based on Cubic Feet.  And density of activated carbon changes from batch to batch and it could be possible that now actual density is quite higher than their earlier range and in actual, you are getting less carbon than the cubic feet.

So basically, we would like to make you aware that density is very critical part of activated carbon and please ask your supplier for actual density at the time of purchase.

Also, if you want to approximately calculate density then there is easy way and most of us could have enough facility at our warehouse.



To calculate density at your warehouse, you can take some apparatus like measure flask. Weigh the measure flask when it is empty. For example it weighs 200 grams. Now fill activated carbon in it up to one liter mark. Weight again. For example now weight is 700 grams. So your one liter of activated carbon equals 500 grams (700 – 200). So density of your carbon is 500 gm/liter. Please note that this is approximate method not the    accurate one. Also there could be possibility that your sample carbon is from some batch which could have higher or lower density and overall density is slightly different.

Knowing this, we at D&R Corporation have an option to buy activated   carbon in litres of cubic feet (in actual cubic feet) and we always give you real density of activated carbon not some pre-set standards.

We appreciate you for reading.....!!!