Adsorption Behavior of Halogenated Anesthetic and Water Vapor on Cr‐Based MOF (MIL‐101) Adsorbent. Part I. Equilibrium and Breakthrough Characterizations

Abstract

A synthesized chromium-based metal organic framework (Cr-MOF) was used for the adsorption of halogenated anesthetics, i.e., sevoflurane (SF). Adsorption isotherm and breakthrough experiments involving SF (reference sorbate) and water vapor were measured at 298 K and atmospheric pressure on both Cr-MOF and a commercially used reference adsorbent. The Cr-MOF MIL-101 showed a significantly higher SF adsorption capacity and much higher selectivity relative to water vapor compared to the reference adsorbent. Binary-mixture breakthrough tests demonstrated a ''roll-up effect'' for SF on the reference adsorbent while no such effect was observed on MIL-101.

Adsorption Behavior of Halogenated Anesthetic and Water Vapor on Cr‐Based MOF (MIL‐101) Adsorbent. Part II. Multiple‐Cycle Breakthrough Tests

“…The same roll-up effect can be observed in the multicycle breakthrough experiments for the reference sample as demonstrated in [1]: water vapor reaches the saturation point much later than SF due to its higher affinity and eventually ''pushes out'' SF from the column. The results reported in this study provide a useful insight into the potential use of MIL-101 as higher performance replacement adsorbent for conventional adsorbent materials (reference sample) that are currently used for the capture of halogenated anesthetics.…”

“…The binary-mixture equilibrium capacity of water vapor for cycle 1 is relatively close to its single-component equilibrium capacity as presented in [1], showing that water vapor behaves as the single-component system, i.e., it is not affected by the presence of SF in the mixture. The binary-mixture equilibrium capacity of water vapor for cycle 1 is relatively close to its single-component equilibrium capacity as presented in [1], showing that water vapor behaves as the single-component system, i.e., it is not affected by the presence of SF in the mixture.…”

“…Textural properties, adsorption isotherm data as well as equilibrium and dynamic adsorption capacities at 298 K and atmospheric pressure for the reference sample, the MIL-101 powder, and the pellet sample are reported in [1].…”

“…1. For cycle 1, the SF shows a roll-up effect (explained in detail in [1]) between 145 and 1250 min with relative concentrations above unity (about 1.3 at the maximum) at the column exit. For cycle 1, the SF shows a roll-up effect (explained in detail in [1]) between 145 and 1250 min with relative concentrations above unity (about 1.3 at the maximum) at the column exit.…”

“…Adsorption isotherm data as well as equilibrium and dynamic adsorption capacities at 298 K and atmospheric pressure were reported in [1]. Due to the higher adsorption capacity and selectivity of sevoflurane over water vapor for the MIL-101 sample compared to the commercially used reference sample, further investigations were warranted.…”