KAGAKU KOGAKU RONBUNSHU
Online ISSN : 1349-9203
Print ISSN : 0386-216X
ISSN-L : 0386-216X
Environment
Evaluation of Performance and Durability of Calcium Ferrite in CO2–CO Conversion
Kenji KamiyaNobusuke Kobayashi Yoshinori ItayaTsuguhiko Nakagawa
Author information
JOURNAL RESTRICTED ACCESS

2021 Volume 47 Issue 5 Pages 169-176

Details
Abstract

The performance and durability of calcium ferrite in repeated redox reactions was examined for the CO2–CO conversion with a solid oxygen carrier. Experimentally, a thermal-gravimetric analyzer and a fixed-bed flow reactor were used, and the effects of reaction temperature and reaction gas concentration on the oxidation/reduction reactions of calcium ferrite with H2 and CO2 were evaluated. Since CaO is converted to CaCO3 by the reaction of reducing carrier and CO2, calcium ferrite cannot be used as oxygen carrier in the case of high CO2 concentration and low reaction temperature. However, in the case of low CO2 concentration and a reaction temperature at which CaCO3 is not generated, calcium ferrite showed good redox performance regardless of the number of reaction cycles. CO production from CO2 in the fixed-bed flow reactor was also confirmed, and the CO2–CO conversion rate was unchanged after 35 cycles of the redox reaction.

Content from these authors
© 2021 The Society of Chemical Engineers, Japan
Previous article
feedback
Top