期刊
CHEMICAL ENGINEERING SCIENCE
卷 65, 期 12, 页码 3709-3717出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2010.03.002
关键词
Chemical reactors; Reaction engineering; Kinetics; Energy; Manganese oxide; Thermochemical water splitting
资金
- United States Department of Energy (DOE) [DE-F636-036013062]
- UNLV foundation
- GEM Consortium
- National Science Foundation
- United States Department of Education
It is shown that the dissociation of Mn2O3 to MnO in a short residence time aerosol flow reactor can achieve high conversions approaching 75% when the concentration of oxygen is kept below 0.25%. Significant recombination reaction occurs when the oxygen content exceeds similar to 0.25% by volume. A dual reaction mechanism for Mn2O3 dissociation was found: RAvrami-Erofeev = A(1)e(-Ea,1/RT)n(1 X)[ ln(1 X)]((n-1)/n) R-Order_of_reaction = -A(2)e(-Ea,2/RT)(1 - X)(n) with the transition from one mechanism to the other occurring at an extent of reaction of approximately 0.6. Rate constants for the two mechanisms were calculated to be 1.8 x 10(7) +/- 1.3 x 10(7) and 5.6 x 10(3) +/- 4.1 x 10(3) s(-1), respectively, for oxygen concentration <0.25%. High levels of dissociation are achievable when the reaction is carried out in an inert gas environment using a reactor configuration that limits the reverse reaction. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据