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- W2955886472 abstract "Abstract Chemical looping combustion (CLC) is a carbon capture technology which enables CO 2 capture with low net efficiency penalty. Calcium sulfate (CaSO 4 ) is an optional oxygen carrier for commercial use, but its usage is limited due to sulfur dioxide (SO 2 ) emission. This study approaches this issue by adding CaO species into the CaSO 4 oxygen carrier to inhibit the release of SO 2 from CaSO 4 oxygen carrier. In this study, the cyclical tests of a CaSO 4 -based oxygen carrier under alternating reducing and oxidizing conditions were performed at 900 °C and 800 °C respectively in a tubular furnace reactor at atmospheric pressure. The effects of reducing gas concentration and molar ratio of CaO/CaSO 4 on the performance of CaSO 4 -CaO oxygen carrier were studied in terms of CO 2 yields, Environmental factors of SO 2 and COS, molar ratios of gas sulfides to CO 2 generated in fuel reactor, and molar ratios of SO 2 and COS to total carbon inlet. The use of CaO additive increased the yields of CO 2 obviously. The release of COS in the fuel reactor and SO 2 in the air reactor decreased, but while the overall release of SO 2 in the fuel reactor increased. However, for per mole CO 2 generation, less gas sulfides released from the fuel reactor. High concentrations of CO were beneficial for CO 2 production and a low SO 2 environmental factor, and meanwhile, the molar ratios of SO 2 released to inlet CO {{text{n}}_{{text{S}}{{text{O}}_2}}} / {{text{n}}_{{text{CO}}}} decreased. However, it led to a drop in CO 2 yield and an increase in COS environmental factor. As a whole, the use of CaO additive and higher CO concentration both accelerated the parallel CaSO 4 reductions in fuel reactor, especially the selectivity of CaSO 4 reduction to CaS." @default.
- W2955886472 created "2019-07-12" @default.
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- W2955886472 date "2019-06-29" @default.
- W2955886472 modified "2023-09-27" @default.
- W2955886472 title "Multicycle Study on Chemical Looping Combustion with a CaSO4-CaO Mixed Oxygen Carrier" @default.
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- W2955886472 doi "https://doi.org/10.1515/ijcre-2018-0114" @default.
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