title: Polyfuran-Derived Microporous Carbons for Enhanced Adsorption of CO₂ and CH₄.
abstract: Oxygen-doped microporous carbons were synthesized by chemical activation of polyfuran with KOH or ZnCl2 at 600 and 800 °C. It was found that KOH preserves and ZnCl2 eliminates the O-C functional groups in the activation process. The O-doped carbon activated with KOH at 800 °C exhibited a high CO2 capacity (4.96 mmol g(-1), 273 K, 1 bar) and CH4 adsorption capacity (2.27 mmol g(-1), 273 K, 1 bar). At 298 K and 1 bar, a very high selectivity for separating CO2/N2 (41.7) and CO2/CH4 (6.8) gas mixture pairs was obtained on the O-doped carbon activated with KOH at 600 °C. The excellent separation ability of the O-doped carbons was demonstrated in transient breakthrough simulations of CO2/CH4/N2 mixtures in a fixed bed adsorber. The isosteric adsorption heats of the O-doped carbons were also significantly lower than those of MOF-74 and NaX zeolite. The O-doped microporous carbon adsorbents appear to be a very promising adsorbent for CO2 capture from flue gas, biogas upgrading, and CH4 storage.
authors.affiliation: Chemical & Materials Engineering Department, New Mexico State University , Las Cruces, New Mexico 88003, United States.
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.affiliation: van't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands.
authors.forename: Rajamani
authors.initials: R
authors.lastname: Krishna
authors.affiliation: Chemical & Materials Engineering Department, New Mexico State University , Las Cruces, New Mexico 88003, United States.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Wu
authors.affiliation: Chemical & Materials Engineering Department, New Mexico State University , Las Cruces, New Mexico 88003, United States.
authors.forename: Yingqiang
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Chemical & Materials Engineering Department, New Mexico State University , Las Cruces, New Mexico 88003, United States.
authors.forename: Shuguang
authors.initials: S
authors.lastname: Deng