Wenju Wang 1, Bin Zhang1, Guoping Wang1, Yunhua Li 2

  • 1 School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • 2 Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen University, Xiamen 361005, China

Received: July 16, 2014
Revised: January 26, 2015
Accepted: July 20, 2015
Download Citation: ||https://doi.org/10.4209/aaqr.2014.07.0140  

  • Download: PDF


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

  • The oxygen release mechanism functions of Mn oxides were determined.
  • The kinetics parameters of the oxygen release process were obtained.

 

ABSTRACT


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 

 

Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

5.9
2020CiteScore
 
 
81st percentile
Powered by
Scopus



2020 Impact Factor: 3.063
5-Year Impact Factor: 2.857

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal that promotes submissions of high-quality research and strives to be one of the leading aerosol and air quality open-access journals in the world. We use cookies on this website to personalize content to improve your user experience and analyze our traffic. By using this site you agree to its use of cookies.