林产化学与工业2025，Vol.45Issue(3)：113-120,8.DOI:10.20195/j.issn.0253-2417.2024044
杉木屑提取精油及制活性炭联产技术研究
Research on the Co-production of Activated Carbon and Extracting Essential Oil From Chinese Fir Sawdust
摘要
Abstract
Supercritical fluid extraction with CO2(SFE)was employed to extract essential oil from Chinese fir,and the post-extraction Chinese fir sawdust residue was used to prepare highly adsorptive activated carbon via phosphoric acid activation.Optimization of SFE parameters and phosphoric acid impregnation processes generated the following optimal conditions for SFE:extraction temperature of 35 ℃,pressure of 30 MPa,and time of 100 min,achieving an essential oil yield of 2.42％.The optimized phosphoric acid impregnation conditions included an impregnation temperature of 130 ℃,duration of 60 min,and phosphoric acid mass fraction of 55％,resulting in activated carbon with an iodine adsorption value of 865.8 mg/g and methylene blue adsorption capacity of 285.0 mg/g,meeting commercial application standards.Scanning electron microscopy(SEM),BET,and X-ray diffraction(XRD)were employed to characterize morphological features,pore structure,and cellulose crystallinity evolution of Chinese fir before and after SFE.Additionally,the influence of SFE on phosphoric acid impregnation was examined.Results indicated that SFE generated surface porosity on Chinese fir sawdust during extraction,increasing the specific surface area from 2.04 m2/g to 10.42 m2/g.XRD results indicated that SFE has a destructive effect on the crystallinity of Chinese fir during the phosphoric acid impregnation process.Economic evaluation demonstrated that the co-production of Chinese fir essential oil and high-adsorption activated carbon offered greater economic benefits compared to conventional methods,affirming the superiority of this integrated approach.关键词
杉木精油/二氧化碳超临界/活性炭/联产技术Key words
Chinese fir essential oil/carbon dioxide supercritical/activated carbon/co-generation technology分类
化学化工引用本文复制引用
文世涛,卢辛成,徐茹婷,许伟,林冠烽,孙康..杉木屑提取精油及制活性炭联产技术研究[J].林产化学与工业,2025,45(3):113-120,8.基金项目
国家重点研发计划资助项目(2023YFD2201601) （2023YFD2201601）
