TY  - JOUR
T1  - Effect of Nutshell Hardness, Chemical and Polymeric Compositions on Porosity and Adsorption Capacity of Nutshell-Based Active Carbons
AU - Friday, O. Nwosu AU - , I. Olu-Owolabi Bamidele AU - , O. Adebowale Kayode AU - , Thomas Henle AU - , Uwe Schwarzenbolz 
JO  - Research Journal of Applied Sciences
VL  - 6
IS  - 7
SP  - 501
EP  - 511
PY  - 2011
DA  - 2001/08/19
SN  - 1815-932x
DO  - rjasci.2011.501.511
UR  - https://makhillpublications.co/view-article.php?doi=rjasci.2011.501.511
KW  - Active carbons
KW  -shell hardness
KW  -adsorption capacity
KW  -crude fibre
KW  -nutshell
KW  -porosity
KW  -cellulose
KW  -lignin
AB  - This study investigated the dependence of iodine numbers, pore volumes and CO<SUB>2</SUB> based active carbon yields on hardness, crude fibre and major polymeric contents of precursor nutshells of <I>Thevetia nerrifolia</I>, <I>Cocos nucifera</I>,<I> Hyphaene thebaica</I>, <I>Hura crepitans</I> and <I>Calophylum inophylum</I>. Physico-chemical studies were performed on the precursor raw nutshell followed by separate carbonization of each of the nutshell in the presence of nitrogen at 480&deg;C for 1 h. Subsequently physical activation of chars was conducted at 840&deg;C with CO<SUB>2</SUB> in a quartz glass tube placed in horizontal furnace. The cellulose content, lignin content, iodine number and BET surface area of prepared active carbons ranged 324.6-412.7, 42.6-293.6, 822.2-1804.0 mg g<SUP>-1</SUP> and 551-2738 m<SUP>2</SUP> g<SUP>-1</SUP>, respectively. Micropore volume ranged 0.100-0.702 cm<SUP>3</SUP> g<SUP>-1</SUP> while mesopore volume ranged 0.017-0.053 cm<SUP>3</SUP> g<SUP>-1</SUP>. Four equations that separately relate crude fibre content and hardness-vickers-diameter ratio of precursors to iodine numbers, porosity, micropore volume and yield of active carbon is therefore suggested.
ER  -