4 research outputs found
Enhancing CO<sub>2</sub> Adsorption via Amine-Impregnated Activated Carbon from Oil Sands Coke
In this work, amine-impregnated
activated carbon was prepared from
oil sands coke, for use in CO<sub>2</sub> capture. Delayed oil sands
coke was activated using microwave heating and KOH as activation agent.
The resulting material was then impregnated with one of diethanolamine,
methyl diethanolamine, or tetraethylene pentamine. Analysis of the
bulk and surface composition of the impregnated samples using elemental
analysis and X-ray photoelectron spectroscopy suggested that the amines
were deposited on the surface of the activated carbon. Materials impregnated
with diethanolamine performed best for CO<sub>2</sub> capture; the
highest adsorption capacity achieved was 5.63 mmol CO<sub>2</sub>/g
adsorbent for activated carbon impregnated with 1.15 mmol N/g activated
carbonnearly 75% higher than reported values for zeolite 13X.
Adsorption of CO<sub>2</sub> on the amine-impregnated activated carbon
at 40, 50, 60, and 75 °C showed that the highest adsorption capacity
was obtained at 50 °C. Using oil sands delayed coke as a precursor
for activated carbon transformed a petroleum waste material into an
effective CO<sub>2</sub> adsorbent. Modifying the prepared activated
carbon with amines improved CO<sub>2</sub> uptake capacity, creating
a useful adsorbent for potential use in CO<sub>2</sub> capture