Experimental demonstration of pressurized chemical looping combustion inan internally circulating reactor for power production with integrated CO2capture
| Autor: | Mogahid Osman, Schalk Cloete, Abdelghafour Zaabout, Shahriar Amini |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Commercial scale
Materials science General Chemical Engineering Nuclear engineering Chemical looping combustion 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences CO2 capture Fluidized-bed Industrial and Manufacturing Engineering Internally circulating reactor 0104 chemical sciences Power (physics) Fluidized bed Environmental Chemistry Fluidization Fuel conversion 0210 nano-technology Correlation for solids circulation rate High pressure operation |
| Zdroj: | Chemical Engineering Journal |
| Popis: | This study presents an experimental demonstration of pressurized chemical looping combustion (CLC) in an internally circulating reactor (ICR). The ICR concept is a novel alternative to the conventional interconnected fluidized bed CLC configuration as it eliminates all cyclones, loop seals and solids transport lines, and it can be pressurized in a single pressure shell. Stable operation with high fuel conversion was established for about 40 h of operation at pressures up to 6 bar, achieving reasonable CO2 purity and capture efficiency (up to 97%). The solids circulation rate was found to increase with increasing the operating pressure at a constant fluidization velocity with no effect on CO2 capture and purity. The experimental campaign also examined the effects of solids inventory and fluidization velocities in the air and fuel reactors. The CO2 purity and capture efficiency were most sensitive to the solids inventory, whereas the solids circulation rate was most sensitive to the air reactor fluidization velocity and the solids inventory. A correlation for solids circulation rate was derived from the collected experimental data, thus providing a robust tool for designing an ICR system for pressurized operation. This correlation can assist in further scale-up and demonstration of the ICR concept in commercial scale. This is an open access article distributed under the terms of the Creative Commons CC-BY license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Databáze: | OpenAIRE |
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