Two-step preparation of asphalt-based porous carbon adsorbent with superior C_(2)H_(6)/CH_(4) selectivity for ethane recovery from natural gasOA
Efficient recovery of ethane(C_(2)H_(6))from natural gas is of industrial importance,yet it poses considerable challenges.Herein,we report the two-step green preparation of asphalt-based carbon adsorbent Asphalt-based Carbon adsorbents(AsCs)with exceptional C_(2)H_(6)/CH_(4) selectivity and high capacity,where the KOH usage can be significantly reduced by 75% than conventional chemical activation processes.More importantly,the resulting AsC-0.75-900 exhibits exceptional C_(2)H_(6)/CH_(4) separation performance with the ideal adsorbed solution theory(IAST)selectivity of 30.74 and C_(2)H_(6) capacity of 4.53 mmol/g at 298 K and 100 kPa.Notably,even at the low pressure of 10 kPa,its C_(2)H_(6) uptake remains high at 2.25 mmol/g,comparable to many advanced metal-organic frameworks(MOFs).Molecular simulation was used to elucidate the adsorption mechanism.Fixed-bed experiments further demonstrate dynamic separation performance,achieving complete separation of a C_(2)H_(6)/CH_(4) binary mixture(10:90,v/v)at ambient condition.In addition to superior separation performance,AsC-0.75-900 offers inherent structural stability and cost-effectiveness,positioning it a highly promising candidate for C_(2)H_(6) recovery from natural gas.
Jinhui Liu;Xiaolong Sun;Fei Teng;Qibin Xia;Zhong Li;Ying Wu;Xin Zhou
School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou,510641,ChinaSchool of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou,510641,ChinaGuangzhou Guanggang Gases&Energy Co.Ltd.,Guangzhou,510380,ChinaSchool of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou,510641,ChinaSchool of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou,510641,ChinaSchool of Chemical Engineering,Guangdong University of Technology,Guangzhou,510006,ChinaSchool of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou,510641,China
化学化工
AsphaltTwo-step preparationPorous carbonC_(2)H_(6)/CH_(4)separationAdsorptive selectivity
《Green Chemical Engineering》 2026 (2)
P.200-208,9
the support from the National Natural Science Foundation of China(Nos.22378138,22278148,and 21978099).
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