Transport Phenomena in a Packed Bed Reactor of Metal Hydride and Promotion of Its Reaction Rates by Heat Transfer Enhancement

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Akito Yoshimura¹  Koichi Nakaso¹  Ryosuke Shigenaga¹  Jun Fukai¹  Yusuke Kitazato¹ 

[1] Department of Chemical Engineering, Graduate School of Engineering, Kyushu University

关键词: Metal Hydride;    Packed Bed;    Transport Phenomena;    Heat Transfer Enhancement;    Carbon Fiber;   

DOI  :  10.1252/jcej.06WE246

来源: Maruzen Company Ltd

【 摘 要 】

References(18)Cited-By(8)Packed bed reactors using metal hydride are attracting a lot of attention as potential future hydrogen storage systems, actuators, etc. However, their low effective thermal conductivities lead to low performance. In this study, carbon fiber brush with high thermal conductivity was installed in a reactor to improve the effective thermal conductivity. We found that the carbon fiber brush at 1.0 vol% reduced the reaction time by 30%. A two-dimensional mathematical model describing the heat and mass transfer was developed to predict the thermal performance. Expansion of particles due to absorption is also considered in this model. The model was compared with the experimental results, and it predicted the time variations of the averaged reacted fraction and local reactor temperature very well. The model suggests that heat transfer rather than mass transfer controls the overall reaction.

【 授权许可】

Unknown