Akira Yasunishi, Miki Fukuma
This study investigates the wall-to-liquid mass transfer coefficient, kw, in packed and fluidized bed systems with gas-liquid concurrent up flow. The objective is to understand the behavior of kw in different configurations, specifically for a coaxially immersed tube and a column wall. We conducted experiments measuring kw across various conditions, including open-pipe liquid flow and gas-liquid two-phase up flow, alongside single liquid flow in packed and fluidized beds. Our results indicate that in three-phase fluidized beds, kw increases with rising gas flow rates and exhibits a maximum related to liquid flow rates, differing from liquid-solid fluidized beds and aligning closer to gas-liquid two-phase up flow conditions. For packed beds, kw also positively correlates with both liquid and gas flow rates. Notably, we found a unified equation correlating kw values across all examined systems based on energy dissipation rate per unit mass of liquid. Furthermore, an analogy is established between wall heat transfer and wall mass transfer in these multiphase flow contexts, reflecting the overall importance of wall-to-liquid mass transfer in chemical reactor design and operation.
@article{d44fe9fb-92e6-40d6-8c54-0b44f2830f14,
title={Wall to liquid mass transfer in packed a},
author={Akira Yasunishi and Miki Fukuma},
year={2026},
language={en}
}TY - JOUR TI - Wall to liquid mass transfer in packed a AU - Akira Yasunishi AU - Miki Fukuma PY - 2026 LA - en ER -
This paper addresses the challenge of assessing the feasibility of wind power plant projects at sites with insufficient or no local historic wind data
Roger Rumbu
This paper provides a detailed investigation into the role of hot gas circulation in metallurgical fluid bed roasters, aiming to enhance heat and mass
Important advances in electrochemical engineering technology over the last three decades have fostered the development of a lternative methods to alle