Evaluation of pyrite cinders from sulfuric acid production as oxygen carrier for chemical looping combustion

Zhong Ma, Guofu Liu, Hui Zhang, Shuai Zhang and Yonggang Lu

Energy, 2021, vol. 233, issue C

Abstract: According to the principle of chemical looping technology, the development of oxygen carriers with high redox performance and low-cost is a prerequisite for the commercial application of chemical looping. In this study, two pyrite cinder samples (Pc-1 with rich Fe2O3 and Pc-2 with rich inert constituents and CaSO4) were investigated as oxygen carriers. The reactivity and cycling stability of the selected samples were studied in a fixed-bed reactor under different reaction temperatures (800 °C, 850 °C and 900 °C). Under 900 °C, the oxygen carrying capacity of Pc-2 sample maintained at around 2.73% after several redox cycles. At the same conditions, the oxygen carrying capacity of Pc-1 sample was about 2.45% in the subsequent multiple cycles. It was observed that Pc-1 sample suffered serious deactivation and surface sintering in the multiple cycle experiment. The Pc-2 sample presented excellent redox performance and anti-sintering ability. When the redox activity of Pc-2 sample reached stable status, the change of reaction temperature showed slight influence on the oxygen carrying capacity of this sample, which indicated that the lattice oxygen in Pc-2 sample revealed high reaction activity. This study provided guidance for screening desired pyrite cinder in the practical applications of chemical looping.

Keywords: Pyrite cinder; Chemical-looping combustion; Redox performance; Oxygen carrier; Industrial solid waste (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:233:y:2021:i:c:s036054422101327x

DOI: 10.1016/j.energy.2021.121079

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