林产化学与工业2026，Vol.46Issue(1)：73-80,8.DOI:10.20195/j.issn.0253-2417.2024218
高热稳定性炭基复合吸附剂的制备及表征
High Thermal Stability Carbon-based Composite Adsorbent:Synthesis and Characterization
摘要
Abstract
To address the issues of binder contamination and poor thermal stability during the formation process of powdered carbon,a series of highly thermally stable activated carbon/attapulgite composite adsorbents(MAT)were prepared using bamboo charcoal(BC)as the raw material and attapulgite(AT)as the binder through extrusion molding,carbonization,steam activation,and other related processes.The pore structure of MAT was characterized by N2 adsorption-desorption analysis,while the surface chemical properties were analyzed using scanning electron microscopy(SEM),Fourier-transform infrared spectroscopy(FT-IR),and X-ray photoelectron spectroscopy(XPS).The influence of AT addition on the thermal stability of MAT was evaluated using thermogravimetric analysis(TG-DTG),ignition point testing,and simultaneous thermal analysis(TG-DSC).Research results indicated that when the mass ratio of BC to AT was 4∶1(i.e.,20%AT addition),the steam activation temperature was 850℃,and the activation time was 120 min,the composite adsorbent MAT-0.2-850-120 achieved optimal overall performance.Its specific surface area(SBET)reached 627.92 m2/g,total pore volume(Vtot)was 0.412 cm3/g,and microporosity was as high as 58.9%.The iodine adsorption value(AI)was 834.9 mg/g,methylene blue adsorption value(AM)was 150 mg/g,CCl4 adsorption rate(AE)was 42.2%,and wear resistance strength(AR)reached 91.1%.Surface chemical analysis revealed that after steam activation,the AT crystals underwent deformation and shrinkage,oxygen-containing functional groups increased,and the adhesive properties of AT were altered.The formation of Mg-O-Si bonds contributed to the maintenance of structural integrity in MAT.Thermal stability analysis demonstrated that AT addition effectively enhanced the ignition point and thermal stability of MAT while reducing the heat released during n-butane adsorption.Specifically,MAT-0.2-850-120 exhibited an ignition point of 492℃,a maximum n-butane adsorption capacity of 58.6 mg/g,and a unit mass adsorption heat of-43.21 J/g.关键词
凹凸棒石/竹炭/水蒸气活化/热稳定性/吸附Key words
attapulgite/bamboo charcoal/steam activation/thermal stability/adsorb分类
化学化工引用本文复制引用
洪超,许伟,黄毅成,刘军利..高热稳定性炭基复合吸附剂的制备及表征[J].林产化学与工业,2026,46(1):73-80,8.基金项目
国家重点研发计划资助项目(2023YFD2201602) （2023YFD2201602）
