C02 Removal By Using Silica Based Membrane

Practically in industry use amine adsorption as anabsorbent for removing carbon dioxide which
is categorized under acidic gas group. However the cost of acid gases removal by using the
mixed amines system is highly expensive. One way to reduce the cost of amine is by replacing
amine adsorption with other method which is more economical and easy to optimize called
membrane technology.
This porous silica membrane layer provides the stability and allows a free flow of the
compounds that permeate through the selective layer. Theycan operate at elevated temperatures,
with many ceramic membranes usable at over 1000°C. They are also much more resistant to
chemical attack, have excellent thermal stability and resistance to corrosive liquids and gases.
Inorganic membranes compete with organic membranes for commercial used. In many of the
harsh operational environments listed above, organic membranes will not perform well, or will
not survive at all. For these environments, only inorganic membranes offer needed solutions.
This research project consists of two experiments; preparation of a-Alumina Substrate and
Preparation of silica Membrane using sol-gel method. For the first experiment the goal is to
achieve 20-25% porosity of the substrate. For the second experiment, nitric acid is used as a
catalyst for silica sol preparation because of its low branched cluster that will result a narrower
pore size of the porosity substrate. The effect of dipping time (1,2 and 3 hours) during dipcoating
of the porousaluminasupport alsobeenstudied and it resulted the silicamembranes with
3 hours dipping time gives highest CO2 permeance.