Preparation of π-complexation adsorbent for ethylene/ethane separation

The thermal dispersion method was used to prepare a π-complexation adsorbent for ethylene/ethane separation, which was composed of lanthanum chloride and cuprous chloride supported on activated carbon. The effects of activated carbon modification, dispersion amounts of CuCl, the different LaCl₃ adding amounts on π-complexation adsorbent for ethylene/ethane separation were studied, with the combination of the absorbent and preparation conditions optimized. Results indicated that compared with H₂O₂, the HF modification showed better in ethylene adsorption capacity and selectivity. XRD quantitative phase analysis results showed that the monolayer dispersion threshold of CuCl on activated carbon was 0.056 g CuCl/100 m² AC. As the lanthanum chloride addition amount is about 11.2% (wt), the ethylene selectivity is doubled as compared with that before.