基于水蒸气活化法的桃木活性炭制备与结构表征  

Preparation and Structural Characterization of Activated Carbon From Fruit Tree Branches Based on Steam Activation Method

作　　者：董江川 刘学磊 任学勇[1] 叶林根 祁项超 贺亮[3] DONG Jiangchuan;LIU Xuelei;REN Xueyong;YE Lingen;QI Xiangchao;HE Liang(College of Materials Science and Technology,Beijing Forestry University,National Forestry and Grassland Engineering Technology Center for Wood Resources Recycling,Beijing 100083,China;Chengde Green World Activated Carbon Co.,Ltd,Hebei Activated Carbon Industry Technology Research Institute,Hebei Activated Carbon Technology Innovation Center,Chengde 067500,China;Key Laboratory of Biological and Chemical Utilization of Forest Resources of Zhejiang Province,Economic Forestry Research Institute of Zhejiang Forestry Science Research Institute,Hangzhou 310023,China)

机构地区：[1]北京林业大学材料科学与技术学院,国家林业草原木质材料循环利用工程技术研究中心,北京100083 [2]承德绿世界活性炭有限公司,河北省活性炭产业技术研究院,河北省活性炭技术创新中心,河北承德067500 [3]浙江省林业科学研究院经济林研究所,浙江省森林资源生物与化学利用重点实验室,浙江杭州310023

出　　处：《林产化学与工业》2024年第6期111-118,共8页Chemistry and Industry of Forest Products

基　　金：河北省中央财政林业科技推广项目(冀TG[2022]004);国家重点研发计划资助项目(2022YFD2200904)。

摘　　要：林果废弃物的利用是经济林产业可持续发展的重要内容,以林果废弃物热解制备的生物炭的碳含量高且灰分较低,适合于制备高值化产品活性炭。以桃木炭为原料,研究了水蒸气活化温度、流量、活化压力和活化时间对桃木活性炭碘吸附值、亚甲基蓝吸附值和产率的影响,对优化条件下制备的桃木活性炭进行了表征,分析了其微观形貌、表面官能团、耐磨强度、孔径特性和吸附性能。研究结果表明:采用水蒸气活化工艺制备桃木活性炭的较优条件为活化温度850℃,水蒸气流量400 L/h,活化压力0.02 MPa,活化时间1 h,此条件下制得活性炭的碘吸附值为962.89 mg/g,亚甲基蓝吸附值为250.58 mg/g,比表面积为855.79 m^(2)/g,总孔容为0.60 cm^(3)/g,微孔孔容为0.19 cm^(3)/g,平均孔径为2.79 nm,耐磨强度为90.64%。以果木为原料,采用水蒸气活化法能够制备孔隙结构丰富,吸附性能优良的果木活性炭。The utilization of forest and fruit wastes was an important part of the sustainable development of the economic forestry industry.The pyrolysis charcoal of forest and fruit wastes had high carbon content and low ash content,which was suitable for the preparation of high-value activated carbon.Taking the pyrolysis charcoal of peach wood as the raw material,the effects of steam activation temperature,flow rate,activation pressure and activation time on the iodine adsorption value,methylene blue adsorption and yield of activated carbon from peach wood were studied.The peach wood activated carbon prepared under the optimized conditions was characterized,and its micro-morphology,surface functional groups,abrasion strength,pore size characteristics and adsorption performance were analyzed.The results showed that the optimal conditions for preparing peach wood activated carbon using the steam activation process were an activation temperature of 850℃,a flow rate of 400 L/h,an activation pressure of 0.02 MPa,and an activation time of 1 h.Under these conditions,the iodine adsorption value of the activated carbon was 962.89 mg/g,the adsorption value of methylene blue was 250.58 mg/g,the specific surface area was 855.79 m^(2)/g,the total pore volume was 0.60 cm^(3)/g,the microporous pore volume was 0.19 cm^(3)/g,the average pore size was 2.79 nm,and the abrasion strength was 90.64%.Fruit wood activated carbon with rich pore structure and excellent adsorption performance could be prepared by steam activation method using fruit wood as raw material.

关 键 词：水蒸气活化 工艺优化 果木生物炭 活性炭 

分 类 号：TQ35[化学工程]