One-step purification of ethylene from acetylene and carbon dioxide by ultramicroporous carbons

Zhiwei Zhao, Yueyue Liu, Xing Liu, Yuan Liu, Jingwen Chen, Shixia Chen, Shuguang Deng, Jun Wang

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The one-step adsorptive separation of high-purity ethylene (C2H4) from a ternary gas mixture (C2H2/C2H4/CO2) is challenging and has not been reported on porous carbons. Herein, we report camphor seeds husk-derived ultramicroporous carbons (CSHs) show high affinities toward acetylene (C2H2) and carbon dioxide (CO2) over C2H4. The optimized CSH-2-700 with high heteroatom contents and centered pore size distributions shows high C2H2 adsorption capacity (2.24 mmol g−1) and record ideal adsorbed solution theory (IAST) C2H2/C2H4 selectivity (10.2) among one-step C2H4 purification adsorbents. Meanwhile, CSH carbons are the only carbon adsorbents that preferentially adsorb CO2 over C2H4, with a CO2/C2H4 selectivity of 1.9 under ambient conditions. Furthermore, dynamic breakthrough experiments verified its feasibility for one-step C2H4 purification from a three-component C2H2/C2H4/CO2 gas-mixture.

Original languageEnglish (US)
Article numbere18046
JournalAIChE Journal
Issue number6
StatePublished - Jun 2023


  • hydroxylamine hydrochloride
  • narrow pore size distribution
  • one-step CH purification
  • ultramicroporous carbons

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • General Chemical Engineering


Dive into the research topics of 'One-step purification of ethylene from acetylene and carbon dioxide by ultramicroporous carbons'. Together they form a unique fingerprint.

Cite this