A series of cost-effective heteroatom-doped porous carbons has been developed from the agricultural by-products of fir bark by a two-step carbonization and activation process. The morphology, chemical characterization and texture properties were investigated by thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectrometry (XPS), elemental analysis (EA), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM) and N₂ adsorption-desorption at 77 K. The results show that fir bark is a suitable precursor for preparing heteroatom-doped activated carbon, corresponding to hetero-oxygen (2.05–7.35 wt. %) and nitrogen (0.8-1.5 wt. %) doping. The lab-made AC materials derived from fir bark, with a surface area of 1377 m²/g, showed a very excellent sorption performance for CO₂ up to 7 mmol/g and 5.2 mmol/g at 273 K and 298 K up to 1 bar, which was significantly higher than the commercial carbon materials and were among the highest compared with other biomass based ACs. The high CO₂ uptakes, moderate heat of adsorption (Qst), good selectivity show that the high performance activated carbons for CO₂ capturing at low pressure can be prepared by KOH activation of fir bark.

通过两步碳化和活化过程，从枞树皮的农业副产品中开发出了一系列具有成本效益的杂原子掺杂多孔碳。通过热重分析（TG），傅里叶变换红外光谱（FTIR），X射线光电子能谱（XPS），元素分析（EA），扫描电子显微镜（SEM），高分辨率对形态，化学特征和织构性质进行了研究透射电镜（HRTEM）和77 K下的N ₂吸附-解吸。结果表明，杉木树皮是制备杂原子掺杂活性炭的合适前体，对应于杂氧（2.05-7.35 wt。％）和氮（ 0.8-1.5重量％）掺杂。由杉木树皮制成的实验室制造的交流材料，表面积为1377 m ²/ g，在最高1 bar的273 K和298 K下，对高达7 mmol / g和5.2 mmol / g的CO ₂表现出非常优异的吸附性能，这明显高于商业碳材料，并且是与其他基于生物质的AC。高的CO ₂吸收量，适度的吸附热（Qst），良好的选择性表明，可以通过杉木树皮的KOH活化来制备用于低压CO ₂捕集的高性能活性炭。