It can be assorted to the following varieties according to the usages: 1、To purify water. 2、To purify gas, oil gas and to remove stink from the oil gases, as a catalyst Analysis itmes Index Analysis items Index Granular diameter 0.4－3mm Heap specific weight 0.35－0.55 g/cm3 I value 800－1100mg/g Hardness ≥90% Methylene blue absorption value 120－150mg/g Total hole volume 0.8－1cm3/g Phenolabsorption ≥450mg/g Ash ≤8% Color removal of Methylene blue ≥11ml Water ≤5% Specific surface area 900－1300m2/g