new material from clay was developed that has a resistance to carbon
dioxide flow in upstream for plugging CO2 storage wells.
Thermogravimetric and thermal stability of this material showed a
minimal variation in weight loss with incremental heating up to 420 °C.
Adsorption-desorption of CO2 at various modeled temperature showed an
exothermic and spontaneous process with maximum adsorption capacity of
775 mg/g obtained at 640 psi (43.5 bar) and 50 °C. Higher pressure led
to more storage capacity with physisorption hysteresis curves.
Freundlich and BET models best fit the equilibrium adsorption data with
average regression coefficient of 0.995. The new material can substitute
the conventional cement plugs for upstream carbon sequestration and
prevents the migration of the stored CO2 through the cement plug to the
surface. Also the developed new cement showed no chemical interaction
which confirms the economical impact of using this cement to plug the
CO2 sequestrations wells.