New linear driving force correlation spanning long and short cycle time pressure swing adsorption processes

作者：Hossain Mohammad I; Ebner Armin D; Ritter James A^*

来源：Adsorption, 2016, 22(7): 939-950.

DOI：10.1007/s10450-016-9801-1

• Glueckauf LDF
• Rapid pressure swing adsorption
• Short cycle time PSA
• Macropore diffusion
• Micropore diffusion

A simple, semi-empirical, generalized expression was developed for the LDF mass transfer coefficient k as a function of the half cycle time theta (c) that encompasses and transitions between the well-known regions governed by the long cycle time constant Glueckauf k and the short cycle time dependent k. This new expression can be used to estimate k = f(theta (c) ) for any system, irrespective of the loading and irrespective of theta (c) , no matter if k is in the cycle time dependent region or not. A three times wider transition region between the Glueckauf k and the cycle time dependent k was also established, with the Glueckauf LDF limit now valid for theta (c) > 0.3 and the short cycle time limit now valid for theta (c) < 0.01. When evaluating this region for several adsorbate-adsorbent systems, the minimum Glueckauf theta (c) spanned three orders of magnitude from thousands of seconds to just a few seconds, indicating a cycle time dependent k is not necessarily limited to what is normally considered a short cycle time.

• 出版日期2016-10