Taki, Kentaro, Hideyuki Hayashizaki, Kiyoshi Fukada, A Simplified Bubble Nucleation, Growth and Coalescence Model
for Coke Production Process, ISIJ International, 54(11), 2493-2502 (2014).
A Simplified Bubble Nucleation, Growth and Coalescence Model for Coke Production Process
Kentaro TAKI,1)* Hideyuki HAYASHIZAKI2) and Kiyoshi FUKADA3)
1) Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa, Yamagata, 992-8510 Japan.
2) Process Research Laboratories, Nippon Steel & Sumitomo Metal Corp., 20-1, Shintomi, Futtsu, Chiba, 293-8511 Japan.
3) Steel Research Lab, JFE Steel Corporation, 1 Kokan-cho, Fukuyama, Hiroshima, 721-8510 Japan.
(Received on April 8, 2014; accepted on August 11, 2014)
Coke production process, which involves gas generation, cross-linking, gas foaming as well as solidification phenomena, is extremely complex and is difficult to model them without simplification. In this study, a simple phenomenological model was developed based on a gas foaming simulation model of polymer foaming, which enabled us to simulate the number density of bubbles and their distributed size. The model was extended to account their kinetics of bubble nucleation, growth and coalescence in nonisothermal chemical reactions of gas generation and cross-linking. The bubbles size and morphology obtained from the numerical simulation of two different coals agreed with the pictures of the experiment qualitatively. Five different coals were investigated to understand the relationship between the kinetic and final morphology of coke.
KEY WORDS: numerical simulation; interconnect pores; bubble growth.