首页|Preparation of pistachio shell-based porous carbon and its adsorption performance for low concentration CO2
Preparation of pistachio shell-based porous carbon and its adsorption performance for low concentration CO2
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In this study,high-performance porous carbon for CO2 adsorption was synthesized from pistachio shells and modified with urea to enrich nitrogen content in the porous structure.The effects of activation temperature,KOH-to-carbon ratio,and urea addition on the pore structure and CO2 adsorption capacity of the porous carbon were investigated.Characterization was conducted using N2 adsorption-desorption isotherms,scanning electron microscopy(SEM),X-ray diffraction(XRD),X-ray photoelectron spectros-copy(XPS),and Fourier-transform infrared spectroscopy(FT-1R).Results showed that under preparation conditions of 700℃,KOH-to-carbon ratio of 2,and 15 wt％urea concentration,the synthesized GAC-15-2-700 porous carbon exhibited a maximum specific surface area of 1395 m2/g,micropore volume of 0.505 cm3/g,and N-5 peak area ratio of 65.57％.It achieved a CO2 adsorption capacity of 3.56 mmol/g.Nitrogen functional groups on the porous carbon primarily existed as pyridinic N(N-6),pyrrolic/pyridinic N(N-5),and quaternary N(N-Q),with the enriched micropores and high N-5 content being crucial for CO2 adsorption.
Pistachio shellsPorous carbonCO2 adsorption
Yuhua Zhang、Yanmei Jin、Song Li、Hong Wu、Huijuan Luo
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School of Chemistry and Materials Engineering,Liupanshui Normal University,Liupanshui,China
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