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Reactivity study and kinetic evaluation of CuO-based oxygen carriers modified by three different ores in chemical looping with oxygen uncoupling (CLOU) process
Reactivity study and kinetic evaluation of CuO-based oxygen carriers modified by three different ores in chemical looping with oxygen uncoupling (CLOU) process
- Source :
- Chinese Journal of Chemical Engineering. 37:54-63
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- In the chemical looping with oxygen uncoupling (CLOU) process, CuO is a promising material due to the high oxygen carrier capacity and exothermic reaction in fuel reactor but limited by the low melting point. The combustion rate of carbon is faster than the decoupling rate of oxygen carrier (OC). Hence, high temperature tolerance and rapid oxygen release rate of CuO modified by three different ores were investigated in this study. The kinetics analysis of oxygen decoupling with Cu-based oxygen carriers was also evaluated. Results showed that CuO modified by chrysolite had faster oxygen release rate than that of CuO. Limestone showed obvious positive effect on the oxidization process. The selected OCs could keep stable in at least 20 cycles, for about 1200 min. Shrinking core model (SCM) fitted well for the decoupling process in the temperature range of 1123–1223 K. Reduction rate kinetic information may aid in the development of chemical looping with oxygen uncoupling (CLOU) technologies during reactor design and process modeling. Ternary doped copper oxide with chrysolite and limestone could improve the reactivity of CuO in decoupling and coupling process and also improve the high temperature tolerance.
- Subjects :
- Exothermic reaction
Copper oxide
Environmental Engineering
Materials science
General Chemical Engineering
chemistry.chemical_element
02 engineering and technology
General Chemistry
Atmospheric temperature range
021001 nanoscience & nanotechnology
Combustion
Biochemistry
Oxygen
chemistry.chemical_compound
020401 chemical engineering
chemistry
Chemical engineering
Reactivity (chemistry)
0204 chemical engineering
0210 nano-technology
Decoupling (electronics)
Chemical looping combustion
Subjects
Details
- ISSN :
- 10049541
- Volume :
- 37
- Database :
- OpenAIRE
- Journal :
- Chinese Journal of Chemical Engineering
- Accession number :
- edsair.doi...........0b1a0ff218a80b2befe3926021663213
- Full Text :
- https://doi.org/10.1016/j.cjche.2020.12.027