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Inhibition of temperature runaway phenomenon in the Sabatier process using bed dilution structure: LBM‐DEM simulation
Author(s) -
Lin Yixiong,
Yang Chen,
Choi Cheolyong,
Zhang Wei,
Fukumoto Kazui,
Machida Hiroshi,
Norinaga Koyo
Publication year - 2021
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.17304
Subject(s) - dilution , inert , chemistry , lattice boltzmann methods , discrete element method , kinetic energy , thermodynamics , mechanics , materials science , physics , classical mechanics , organic chemistry
The Sabatier process is promising for carbon dioxide utilization and energy storage. However, the serious problem that limits more comprehensive industrial applications is catalyst deactivation due to the temperature runaway phenomenon. The inert particle dilution approach, including the mixing dilution method and layered dilution method is applied to solve this problem. Based on the lattice kinetic scheme‐lattice Boltzmann method (LKS‐LBM), the effects of three parameters in bed dilution structure reconstructed by the discrete element method (DEM) on temperature distribution and carbon conversion rate were discussed, so as to investigate the relationship between packing structure and temperature distribution. Furthermore, numerical results indicated that an optimal bed dilution structure, which not only can control the peak temperature below the critical temperature to avoid coking and sintering of catalyst, but also can improve the conversion rate by almost 18% compared with the structure without dilution under the same circumstance.