- 著者
- 鈴木 素行 Suzuki Motoyuki
- 出版者
- 筑波大学歴史・人類学系
- 雑誌
- 筑波大学先史学・考古学研究 (ISSN:09180419)
- 巻号頁・発行日
- no.23, pp.43-58, 2012-03
- 著者
- NAKAO SHIN-ICHI SUZUKI MOTOYUKI
- 出版者
- The Society of Chemical Engineers, Japan
- 雑誌
- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN (ISSN:00219592)
- 巻号頁・発行日
- vol.16, no.2, pp.114-119, 1983
- 被引用文献数
- 3 110
Intraparticle distribution of adsorbate amount in cyclic adsorption and desorption is simulated by two methods: rigorous numerical solution of the particle-phase diffusion equation and the linear driving force (LDF) approximation. It becomes clear that the conventional value of 15 <i>D</i><sub>s</sub>/<i>R</i><sup>2</sup> as the intraparticle mass transfer coefficient, <i>k</i><sub>s</sub><i>a</i><sub>v</sub>, in the LDF method is not advisable for the simulation of transient adsorption and desorption. A mass transfer coefficient defined by including the cycle time is thus proposed. In this new conception, <i>k</i><sub>s</sub><i>a</i><sub>v</sub> increases with decreasing cycle time and approaches π<sup>2</sup><i>D</i><sub>s</sub>/<i>R</i><sup>2</sup> with increasing cycle time. Simulations of cyclic mode by the LDF method using this new <i>k</i><sub>s</sub><i>a</i><sub>v</sub> agree well in the steady state with that obtained by numerical solution of the diffusion equation. In unsteady-state operation, however, the two simulations do not coincide with each other because of overestimation of driving force for adsorption and underestimation for desorption in the LDF method.