Improving the reactivity of ilmenite as an oxygen carrier in chemical looping combustion

Authors: Askaripour, Mahdi
Advisor: Darvishi Alamdari, HoushangKaliaguine, S.
Abstract: Chemical looping combustion (CLC) is one the suitable technologies to produce the energy allowing easy capture of CO2. In this system, an oxygen carrier reacts with a fuel agent in the fuel reactor and then it goes toward the oxidation reactor and reacts with oxygen to return to the initial form. After reduction reaction, CO2 can be stored easily since it is almost pure and free from nitrogen. So, the oxygen carrier in CLC plays an important role. Based on the literature, ilmenite has shown low reactivity when CH4 was used as fuel. In this project, increasing the surface area of ilmenite and addition of NiO were explored aiming at increasing the reactivity of ilmenite with CH4. Samples were prepared by mechanical milling , using low and high energy ball milling steps. Different techniques such as BET, thermo gravimetric analysis (TGA) and X-ray diffraction (XRD) were used to characterize the oxygen carrier and its reactivity with CH4. The results showed that the high surface area of ilmenite containing 8 % NiO exhibited high reactivity and high oxygen transfer capacity when CH4 was used as fuel.
Document Type: Mémoire de maîtrise
Issue Date: 2018
Open Access Date: 21 December 2018
Grantor: Université Laval
Collection:Thèses et mémoires

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