Abstract

The thermogravimetric method was used to study one-stage pyrolysis of finely ground flax shive chemically activated by NH₄NO₃ (AN) and NH₄Cl (NAC). Activated carbons (AC) were obtained and the chemical activation mechanism was determined. The morphology, surface area and pore size distribution of the AC samples were studied by the methods of scanning electron microscopy, low-temperature nitrogen adsorption, energy-dispersive X-ray spectroscopy and X-ray diffraction. The maximum methylene blue adsorption capacity of the obtained AC samples was determined. The optimal parameters of activated flax shive pyrolysis (temperature, time) required for obtaining AC with the maximum specific surface area and adsorption capacity were identified.

摘要

_{热重法用于研究NH 4} NO ₃ (AN)和NH ₄ Cl (NAC)化学活化的细磨亚麻碎屑的一步热解。获得了活性炭（AC）并确定了化学活化机理。采用扫描电镜、低温氮吸附、能量色散X射线光谱和X射线衍射等方法研究了活性炭样品的形貌、比表面积和孔径分布。确定了获得的 AC 样品的最大亚甲基蓝吸附容量。确定了获得具有最大比表面积和吸附容量的活性炭所需的活化亚麻碎屑热解的最佳参数（温度、时间）。