Loading...
The production of an activated carbon from a coke precursor
Author(s)
Rossouw, Nicolaas Malan
Date Issued
2002
Type
Thesis
Publisher
Cape Technikon
Abstract
The activation of green '"'Smartie"" coke (a mixture of medium temperature pitch
and waxy oil coke) was investigated in a laboratory scale fluidised bed (FB) and
a rotary kiln as function of (1) heat treatment temperature (HIT) and (2) heat
treatment time (HTt). Activation in the FB was more effective (in terms of surface
area development) and the product obtained from this type of reactor had a
larger percentage of mesopores than the products from the rotary kiln. It was
possible to produce a product with an iodine number equal to 745 mg iodine per
gram carbon.
The study revealed that it is possible to tune the pore structure of "Smartie" coke
derived activated carbons by changing the activation device and systematically
changing the activation conditions. It was possible to obtain products ranging
from a predominantly microporous structure to products with a predominantly
mesoporous structure. Unfortunately, in comparison to commercially available
activated carbons, the total surface areas were still too low and it will be
necessary to perform further investigations focused on increasing the total
surface areas.
The gold adsorption tests performed on the activated carbon compared well to
those of activated carbon currently in use in the gold industry.
and waxy oil coke) was investigated in a laboratory scale fluidised bed (FB) and
a rotary kiln as function of (1) heat treatment temperature (HIT) and (2) heat
treatment time (HTt). Activation in the FB was more effective (in terms of surface
area development) and the product obtained from this type of reactor had a
larger percentage of mesopores than the products from the rotary kiln. It was
possible to produce a product with an iodine number equal to 745 mg iodine per
gram carbon.
The study revealed that it is possible to tune the pore structure of "Smartie" coke
derived activated carbons by changing the activation device and systematically
changing the activation conditions. It was possible to obtain products ranging
from a predominantly microporous structure to products with a predominantly
mesoporous structure. Unfortunately, in comparison to commercially available
activated carbons, the total surface areas were still too low and it will be
necessary to perform further investigations focused on increasing the total
surface areas.
The gold adsorption tests performed on the activated carbon compared well to
those of activated carbon currently in use in the gold industry.
Additional information
Thesis (MTech (Chemical Engineering))--Cape Technikon, Cape Town, 2002
File(s)![Thumbnail Image]()
Loading...
Name
Rossouw_nm_MTech_chem_eng_2002
Size
2.19 MB
Format
Adobe PDF
Checksum
(MD5):6b29363aaaab61146d31b4d7bfdd1ba8