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• W3176130402 endingPage "187" @default.
• W3176130402 startingPage "179" @default.
• W3176130402 abstract "Chemical looping conversion of coal (CLCC), an innovative technology, is an efficient and clean way for the utilization of coal. Oxygen carrier (OC) reduction by the coal is the rate-limiting process for the CLCC with deep OC reduction. K-decorated Fe 2 O 3 /Al 2 O 3 OC, found to be a promising OC, can increase the reaction rate of OC and char. Unfortunately, due to the complexity of the OC the preparation conditions on the performance of this composite OC were not clear. In this study, the effect of Al 2 O 3 content and calcination temperature on the activity and stability of Fe-based OC were investigated by thermogravimetric analysis (TGA), H 2 temperature-programmed reduction (TPR), N 2 adsorption analyzer, X-ray diffraction (XRD) and scanning electron microscope (SEM). The impact of K 2 CO 3 loadings on the reactivity and stability of OC was also studied in a fix-bed reactor. In addition, optimal preparation conditions were screened out. The results showed that Al 2 O 3 could increase the specific surface area of OC and anti-sintering ability. However, the Al 2 O 3 had an adverse impact on the mechanical strength and reactivity of OC. The increase of calcination temperature of OC could increase the mechanical strength but decrease the reactivity of OC. The loading of K 2 CO 3 could significantly improve the reactivity of OC, and K 2 CO 3 was favorable for the redox stability of OC. The optimal preparation conditions of the composite OC are as follows: the addition amount of Al 2 O 3 was 30%, the addition amount of K 2 CO 3 was 5%, and the calcination temperature of OC was 1030 °C. • Optimal preparation conditions of oxygen carrier were screened out. • K 2 CO 3 could significantly improve the reactivity of oxygen carrier. • Al 2 O 3 had an adverse impact on the mechanical strength of oxygen carrier. • K 2 CO 3 was favorable for the redox stability of oxygen carrier." @default.
• W3176130402 created "2021-07-05" @default.
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• W3176130402 date "2021-10-01" @default.
• W3176130402 modified "2023-10-16" @default.
• W3176130402 title "Effect of preparation conditions on the performance of K-decorated Fe2O3/Al2O3 oxygen carrier (OC) in chemical looping conversion of coal process with deep OC reduction" @default.
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• W3176130402 doi "https://doi.org/10.1016/j.joei.2021.06.015" @default.
• W3176130402 hasPublicationYear "2021" @default.
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