Autothermal operation of a pressurized Gas Switching Combustion with ilmenite ore. (August 2017)

• Record Type: Journal Article
• Authors: Zaabout, Abdelghafour; Cloete, Schalk; Amini, Shahriar
• Is Part Of: International journal of greenhouse gas control. Volume 63(2017)
• Page Start: 175
• Page End: 183
• Publication Date: 2017-08
• Subjects: Greenhouse gases -- Environmental aspects -- Periodicals; Air -- Purification -- Technological innovations -- Periodicals; Gaz à effet de serre -- Périodiques; Gaz à effet de serre -- Réduction -- Périodiques; Air -- Purification -- Technological innovations; Greenhouse gases -- Environmental aspects; Periodicals; 363.73874605
• DOI: 10.1016/j.ijggc.2017.05.018
• Languages: English
• ISSNs: 1750-5836

Abstract

Highlights: Gas Switching Combustion reactor concept for power production with integrated CO2 capture. Autothermal pressurized operation of the GSC reactor. Ilmenite ore as oxygen carrier for the use in a GSC-IGCC plant. Abstract: This paper presents further experimental testing of the Gas Switching Combustion (GSC) concept where ilmenite is used as oxygen carrier and CO as fuel for integration into an IGCC plant. In contrast to conventional chemical looping combustion (CLC), GSC keeps the oxygen carrier in a single fluidized bed reactor where it is alternately exposed to fuel and air. This reactor configuration greatly simplifies scale-up under the pressurized conditions required for competitive efficiency in gas-fuelled chemical looping applications. Autothermal operation of the lab-scale GSC reactor was achieved for ilmenite and a synthetic Ni-based oxygen carrier. Even though the synthetic oxygen carrier clearly outperformed the ilmenite ore in terms of reactivity and oxygen transport capacity, ilmenite performance was found to be good enough for efficient application in GSC-IGCC power plants. The experiments also suggest that ilmenite kinetics is not negatively affected by increases in pressure as has been reported for other synthetic oxygen carriers, thereby further increasing the attractiveness of ilmenite as an oxygen carrier for the high-pressure GSC-IGCC application.