Wenju Wang 1, Bin Zhang1, Guoping Wang1, Yunhua Li 2
Received:
July 16, 2014
Revised:
January 26, 2015
Accepted:
July 20, 2015
Download Citation:
||https://doi.org/10.4209/aaqr.2014.07.0140
Cite this article:
Wang, W., Zhang, B., Wang, G. and Li, Y. (2016). O2 Release of Mn-Based Oxygen Carrier for Chemical Looping Air Separation (CLAS): An Insight into Kinetic Studies.
Aerosol Air Qual. Res.
16: 453-463. https://doi.org/10.4209/aaqr.2014.07.0140
HIGHLIGHTS
Chemical looping air separation (CLAS) is an air separation technology with a relatively small energy footprint. In this contribution, the kinetic study of Mn-based oxygen carriers has been carried out in a CLAS process. The O2 release behavior was investigated under Ar in a fixed bed. Results showed O2 release amounts increase gradually with an increasing temperature. Moreover, fitting various gas-solid reaction mechanisms with the experimental data was used to obtain the chemical reaction kinetics for MnO2 and Mn2O3 for O2 release. As for all involved gas–solid reaction mechanisms, the first-order chemical reaction model (C1) and Avrami–Erofe’ev random nucleation and subsequence growth model (A2) fitted well with O2 release experimental data for MnO2 and Mn2O3, respectively. Furthermore, activation energy, pre-exponential factor and reaction order were also determined for these models.
Keywords:
Mn-based oxygen carrier; Kinetic; Activation energy; Chemical looping air separation (CLAS); O2 release
Share this article with your colleagues
