期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：237
期号：3
页码：032089
DOI：10.1088/1755-1315/237/3/032089
出版社：IOP Publishing
摘要：The kinetics of YBaCo4O7+δ and Y0.5Dy0.5BaCo4O7+δ oxygen carriers is determined using the experimental data obtained by fixed-bed apparatus. The results show that rate of oxygen release increases with the increase of reaction temperature. The mechanism function of reduction reaction is not affected Dy substituting. The Avrami-Eroféev mechanism function describes solid phase change of oxygen desorption adequately. The results show that the distributed activation energy of reduction process obtained by A model is about 29.72 kJ/mol and 23.30 kJ/mol for YBaCo4O7+δ and Y0.5Dy0.5BaCo4O7+δ oxygen carrier, respectively. The pre-exponential factor obtained is about 29.727 mol/(L min) and 12.826 mol/(L min) for YBaCo4O7+δ and Y0.5Dy0.5BaCo4O7+δ oxygen carrier, respectively.
