Adsorption Properties of C₂H₄ and C₃H₆ on 11 Adsorbents

Abstract

Adsorption isotherms of pure C2H4 and C3H6 were measured on 11 adsorbents and at pressures up to 0.8 MPa using a volumetric method. The Brunauer–Emmett–Teller (BET) surface area of the adsorbents had a significant effect on adsorption capacities of both C2H4 and C3H6. The metal organic framework MIL-101 had the highest BET surface area and the highest adsorption capacity. For zeolite molecular sieves 5A, the C2H4 adsorption capacity was higher than that of C3H6, which is opposite to the results for most adsorbents. The isosteric heats of C3H6 on AC-1, 5A, MIL-101, ZIF-8, and SG-1 were higher than those of C2H4. The C3H6/C2H4 separation selectivities were calculated using the ideal solution theory, and the activated carbon AC-1 had the highest separation selectivity of 8.8.

Studying ZIF-8 SURMOF Thin Films with a Langatate Crystal Microbalance: Single-Component Gas Adsorption Isotherms Measured at Elevated Temperatures and Pressures

“…Next, in order to verify the accuracy of the langatate crystal microbalance (LCM) and therefore the reliability of the data deduced, adsorption experiments at 35 °C were conducted for CO 2 , C 2 H 6 , C 2 H 4 , C 3 H 8 , and C 3 H 6 . The data obtained is in good agreement with the other published adsorption isotherms for ZIF-8. − Considering alkanes and alkenes, these studies (experiments conducted at 20–35 °C) report the following ranges at 1 bar: 1–2.5 mmol/g –1 for C 2 H 6 , 0.7–1.6 mmol/g –1 for C 2 H 4 , 3.6–4.4 mmol/g –1 for C 3 H 8 , and 2.7–4.5 mmol/g –1 for C 3 H 6 . Moreover, molecular simulations and experimental studies have reported that the strongest adsorption sites in ZIF-8 are in the surroundings of the linkers. − …”

Influence of Onion-like Carbonaceous Particles on the Aggregation Process of Hydrocarbons

“…There has been a great amount of experimental research on the adsorption of aliphatic and aromatic molecules on different adsorbents. For the alkenes, the adsorption capacity of C 3 H 6 was higher than that of C 2 H 4 for most of the adsorbents . The adsorption of BTEX on activated carbon was observed to proceed in the order xylene > ethylbenzene > toluene > benzene, as related to decreased solubility and increased molecular weight .…”

“…For the alkenes, the adsorption capacity of C 3 H 6 was higher than that of C 2 H 4 for most of the adsorbents. 12 The adsorption of BTEX on activated carbon was observed to proceed in the order xylene > ethylbenzene > toluene > benzene, as related to decreased solubility and increased molecular weight. 13 It is also reported that carbon nanotubes have higher adsorption affinities for the organic compounds with a planar molecular configuration.…”

Comparative Study of Ag+-Based Adsorbents Performance in Ethylene/Ethane Separation

“…The π-complexation adsorbent is the core of π-complexation adsorptive separation technology. − Recent studies have focused on how to achieve highly dispersed silver ions on the support. Yang loaded silver nitrate on silica, MCM-41, and SBA-15 via the impregnation method .…”