Thermally Driven Copper Oxide Redox Cycle for the Separation of Oxygen from Gases
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- 作者：M. H盲nchen ; A. Stiel ; Z. R. Jovanovic ; A. Steinfeld
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2012
- 出版时间：May 23, 2012
- 年：2012
- 卷：51
- 期：20
- 页码：7013-7021
- 全文大小：533K
- 年卷期：v.51,no.20(May 23, 2012)
- ISSN：1520-5045
文摘
The copper(I) oxide (Cu2O)/copper(II) oxide (CuO) redox thermochemical cycle is thermodynamically and experimentally examined as means for removal of oxygen from dilute gas streams. The thermal energy required for removal of oxygen from a 1% O2鈥揂r gas mixture is estimated to range from 545 to 2121 kJ/mol O2. Temperatures as high as 1350 K imposed by this thermochemical cycle offer potential for using concentrated solar energy as the source of process heat. The kinetics of the redox reactions and their cycle-to-cycle repeatability were investigated by thermogravimetry. Laboratory scale packed bed reactor tests have pointed out the bulk shrinking of the packing during the initial high temperature cycles as a cause of gas bypassing that may have adverse effects on the reactor contacting efficiency.