NDLI: Examining SrCuO$_{2}$ as an oxygen carrier for chemical looping combustion

Content Provider	Springer Nature Link
Author	Ksepko, E.
Copyright Year	2015
Abstract	This paper contains the results of research work on chemical looping combustion (CLC). CLC is one of the most promising combustion technologies and has the main advantage of producing a concentrated CO$_{2}$ stream, which is obtained after water condensation without any energy penalty for CO$_{2}$ separation. The objective of this work was to study the chemical looping reaction performance for a novel spinel-type oxygen carrier. The SrCuO$_{2}$ was tested for the purpose of CLC for power generation, and hydrogen was utilized as a syngas component. SrCuO$_{2}$ was prepared as a powder. Reactivity tests were performed under isothermal conditions for multiple redox cycles using a thermogravimetric (TG) analyzer (Netzsch STA 409 PG Luxx). For the reduction, 3 % H$_{2}$ was used, and for the oxidation cycle, air was used. The effect of both reaction temperature (600–800 °C) and reducing/oxidizing cycles (five cycles at each temperature) on the reaction performance of the oxygen carrier samples developed in this study was evaluated. The stability, oxygen transport capacity and reaction rates were analyzed based on experimental TG data. The material was systematically investigated by scanning electron microscopy, X–ray diffraction measurements, N$_{2}$ porosimetry, particle size distribution and studying the melting behavior. Investigation of the oxidation/reduction behavior of SrCuO$_{2}$ showed stable chemical looping performance, with great recyclability after continuous multiple redox reactions maintaining the chemical properties. Moreover, excellent oxygen capacity was maintained within cycling combustion tests. Furthermore, the oxygen carrier sample attained a high melting temperature, which provides attractive thermal resistivity. For comparison purposes, another Cu-based oxygen carrier was prepared and analyzed in the same manner. The CuO/TiO$_{2}$ carrier transported similar amounts of oxygen to the fuel, but its stability to reaction was questionable. The promising results obtained from CLC allowed us to conclude that SrCuO$_{2}$ is possibly a capable and suitable candidate for CLC for power generation.
Starting Page	621
Ending Page	633
Page Count	13
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	122
Issue Number	2
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-06-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	SrCuO$_{2}$ TG Hydrogen Chemical looping combustion Oxygen transport capacity XRD Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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