CARBONACEOUS MATERIALS FOR USE IN METHODS OF MANUFACTURING ACTIVATED CARBON
A sorbent composition comprises primarily activated carbon with at least most of the particulates of the sorbent composition having a mean and/or median sphericity in the range of from about 0.75 to about 1.0, a total pore volume ranging from about 0.5 to about 0.95 cc/g, a pore volume for pores less than 500 Å ranging from about 0.6 to about 0.8 cc/g, and a BET surface area of at least about 900 m 2 /g, and one or more of a butane activity (measured by ASTM Method D5742) of more than about 20 wt % and a butane working capacity (measured by ASTM Method D5228) of at least about 5 wt %.
1 . A sorbent composition comprising primarily activated carbon, at least most of the particulates of the sorbent composition having a mean and/or median sphericity in the range of from about 0.75 to about 1.0, a total pore volume ranging from about 0.5 to about 0.95 cc/g, a pore volume for pores less than 500 Å ranging from about 0.6 to about 0.8 cc/g, and a BET surface area of at least about 900 m 2 /g, and having at least one of a butane activity (measured by ASTM Method D5742) of more than about 20 wt % and a butane working capacity (measured by ASTM Method D5228) of at least about 5 wt %.
2 . The sorbent composition of claim 1 , further comprising one or more super oxidants.
3 . The sorbent composition of claim 1 , wherein the butane activity is greater than about 20 wt %, wherein the sorbent composition comprises at least about 75 wt % carbon, wherein the sorbent composition has a ball ban hardness of greater than about 60%, a BET surface area of at least about 900 m 2 /g, a total pore volume in the range of from about 0.55 to about 0.90 cc/g, and a total pore volume for pores less than 500 Å ranging from about 0.62 to about 0.78 cc/g.
4 . The sorbent composition of claim 3 , wherein a total pore volume of pores in the range of more than 20 to about 500 Å ranges from about 0.2 to about 0.4 cc/g and a total volume of pores equal to or less than 20 Å ranges from about 0.3 to about 0.5 cc/g.
5 . The sorbent composition of claim 1 , wherein at least about 60% of the sorbent composition particulates have a sphericity ranging from about 0.85 to about 1 and an aspect ratio of at least about 0.7 and wherein the sorbent composition has an iodine number ranging from about 900 mg/g to about 1150 mg/g and an apparent density ranging from about 0.3 to about 0.6 g/cc.
6 . The sorbent composition of claim 1 , wherein the sorbent composition has a carbon tetrachloride capacity is at least about 50 wt %, an H 2 S capacity of at least about 0.2 g/cc, and an H 2 S loading of at least about 50 wt %.
7 . The sorbent composition of claim 1 , wherein the sorbent composition has an acetone adsorption isotherm percentage (at 25° C.) ranging from about 40 wt % to about 50 wt %, an MEK adsorption isotherm percentage (at 25° C.) ranging from about 30 wt % to about 50 wt %, a toluene adsorption isotherm percentage (at 25° C.) of at least about 80 wt %, and a limonene adsorption capacity (at 25° C.) ranging from about 20 wt % to about 50 wt %.
8 . A sorbent composition comprising primarily activated carbon, at least most of the particulates of the sorbent composition having a mean and/or median sphericity in the range of from about 0.75 to about 1.0, a total pore volume ranging from about 0.5 to about 0.95 cc/g, a pore volume for pores less than 500 Å ranging from about 0.6 to about 0.8 cc/g, and a BET surface area of at least about 900 m 2 /g, and having at least one of a carbon tetrachloride capacity of at least about 50 wt %, an H 2 S capacity of at least about 0.2 g/cc, and an H 2 S loading of at least about 50 wt %.
9 . The sorbent composition of claim 8 , further comprising one or more super oxidants.
10 . The sorbent composition of claim 8 , wherein the sorbent composition has a carbon tetrachloride capacity of at least about 50 wt %, an H 2 S capacity of at least about 0.2 g/cc, and an H 2 S loading of at least about 50 wt %, wherein the sorbent composition comprises at least about 75 wt % carbon, wherein the sorbent composition has a ball ban hardness of greater than about 60%, a BET surface area of at least about 900 m 2 /g, a total pore volume in the range of from about 0.55 to about 0.90 cc/g, and a total pore volume for pores less than 500 Å ranging from about 0.62 to about 0.78 cc/g.
11 . The sorbent composition of claim 10 , wherein a total pore volume of pores in the range of more than 20 to about 500 Å ranges from about 0.2 to about 0.4 cc/g and a total volume of pores equal to or less than 20 Å ranges from about 0.3 to about 0.5 cc/g.
12 . The sorbent composition of claim 8 , wherein at least about 60% of the sorbent composition particulates have a sphericity ranging from about 0.85 to about 1 and an aspect ratio of at least about 0.7 and wherein the sorbent composition has an iodine number ranging from about 900 mg/g to about 1150 mg/g and an apparent density ranging from about 0.3 to about 0.6 g/cc.
13 . The sorbent composition of claim 8 , wherein the sorbent composition has a butane activity (measured by ASTM Method D5742) of more than about 20 wt % and a butane working capacity (measured by ASTM Method D5228) of at least about 5 wt %.
14 . The sorbent composition of claim 8 , wherein the sorbent composition has an acetone adsorption isotherm percentage (at 25° C.) ranging from about 40 wt % to about 50 wt %, an MEK adsorption isotherm percentage (at 25° C.) ranging from about 30 wt % to about 50 wt %, a toluene adsorption isotherm percentage (at 25° C.) of at least about 80 wt %, and a limonene adsorption capacity (at 25° C.) ranging from about 20 wt % to about 50 wt %.
15 . A method, comprising:
providing a carbonaceous feed material comprising at least about 50 wt % carbon, no more than about 10 wt % ash, and a free swelling index of more than about 1 and having a D 50 size distribution of no more than about 100 microns;
contacting the carbonaceous feed material with at least about 0.1 wt % of a green strength binder and optionally at least about 0.1 wt % of an activation binder to form a feed mixture;
homogenizing the feed mixture in a homogenizer to an homogenized feed mixture having a D 50 particle size of no more than about 100 μm;
shaping the homogenized feed mixture in a spheronizer to form spheronized agglomerates, at least most of the spheronized agglomerates having a sphericity ratio ranging from about 0.75 to about 1.0 and an aspect ratio of at least about 0.7;
charring, at a charring temperature of no more than about 1,200° F., the spheronized agglomerates in a charring kiln to form charred agglomerates; and
activating the charred agglomerates, in the presence of steam and at an activation temperature ranging from about 1,400 to about 2,000° F., to form spherical granular activated carbon particulates, wherein the spherical activated carbon particulates have at least one of a butane activity (measured by ASTM Method D5742) of more than about 20 wt % and a butane working capacity (measured by ASTM Method D5228) of at least about 5 wt %.
16 . The method of claim 15 , further comprising contacting the carbonaceous feed material with at least about 0.1 wt % of an activation binder and at least about 0.1 wt % one or more super oxidants to form the feed mixture.
17 . The method of claim 15 , wherein the butane activity ranges from about 25%, wherein the spherical activated carbon particulates comprise at least about 75 wt % carbon, wherein the spherical activated carbon particulates have a ball ban hardness of greater than about 60%, a BET surface area of at least about 900 m 2 /g, a total pore volume in the range of from about 0.55 to about 0.90 cc/g, and a total pore volume for pores less than 500 Å ranging from about 0.62 to about 0.78 cc/g.
18 . The method of claim 17 , wherein a total pore volume of pores in the range of more than 20 to about 500 Å ranges from about 0.2 to about 0.4 cc/g and a total volume of pores equal to or less than 20 Å ranges from about 0.3 to about 0.5 cc/g.
19 . The method of claim 15 , wherein at least about 60% of the spherical activated carbon particulates have a sphericity ranging from about 0.85 to about 1 and an aspect ratio of at least about 0.7 and wherein the spherical activated carbon particulates have an iodine number ranging from about 900 mg/g to about 1150 mg/g and an apparent density ranging from about 0.3 to about 0.6 g/cc.
20 . The method of claim 15 , wherein the spherical activated carbon particulates have a carbon tetrachloride capacity is at least about 50 wt %, an H 2 S capacity of at least about 0.2 g/cc, and an H 2 S loading of at least about 50 wt %.
21 . The method of claim 15 , wherein the spherical activated carbon particulates have an acetone adsorption isotherm percentage (at 25° C.) ranging from about 40 wt % to about 50 wt %, an MEK adsorption isotherm percentage (at 25° C.) ranging from about 30 wt % to about 50 wt %, a toluene adsorption isotherm percentage (at 25° C.) of at least about 80 wt %, and a limonene adsorption capacity (at 25° C.) ranging from about 20 wt to about 50 wt %.