Fig. 1: Schematic diagram of the adsorbent design and adsorption behavior for one-step C3H6 purification.
From: One-step propylene purification from a quaternary mixture by a single physisorbent
a The properties difference of C3H4, C3H4 (PD), C3H6, and C3H8, b the illustration of the strategy of adsorbents design. Introducing O/F electronegative sites into the aromatic-based propane trap to form a cooperative binding environment, and controlling the density of introduced electronegative sites to fine-tune the binding affinity sequence of the four C3 gases, c the adsorption behavior of C3H4, C3H4 (PD), C3H6, and C3H8 under the optimal cooperative interaction environments. C3H4 and C3H4 (PD) exhibit higher affinity with O/F than C3H6 due to their higher polarity, while C3H8 could form more dense interactions with the aromatic-based sites and O/F sites than C3H6.
