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林产化学与工业 ›› 2021, Vol. 41 ›› Issue (4): 92-100.doi: 10.3969/j.issn.0253-2417.2021.04.013

• 研究报告 • 上一篇    下一篇

响应面优化设计棕榈壳活性炭的制备及储氢性能研究

罗路1, 罗凌聪1, 邓剑平1, 范毜仔1,2, 杜官本3, 赵伟刚1,*()   

  1. 1. 福建农林大学 材料工程学院, 福建 福州 350018
    2. 英国布鲁内尔大学 土木工程学院, 英国 伦敦 UB8 3PH
    3. 西南林业大学 材料科学与工程学院, 云南 昆明 650224
  • 收稿日期:2020-09-04 出版日期:2021-08-28 发布日期:2021-08-31
  • 通讯作者: 赵伟刚 E-mail:weigang-zhao@fafu.edu.cn
  • 作者简介:赵伟刚, 副教授, 硕士生导师, 研究领域为生物质基复合材料与多孔炭材料; E-mail: weigang-zhao@fafu.edu.cn
    罗路(1992-), 男, 福建大田人, 博士生, 主要从事生物质能源与材料的研究工作
  • 基金资助:
    国家自然科学基金资助项目(31971593);福建省自然科学基金高校联合项目(2019J01386);福建农林大学科技创新专项基金项目(CXZX2019103)

Preparation of Activated Carbons from Palm Shell by Response Surface Optimization Design and Its Hydrogen Storage Performance

Lu LUO1, Lingcong LUO1, Jianping DENG1, Mizi FAN1,2, Guanben DU3, Weigang ZHAO1,*()   

  1. 1. College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350018, China
    2. College of Engineering, Design and Physical Sciences, Brunel University, London UB8 3PH, United Kingdom
    3. College of Material Science and Engineering, Southwest Forestry University, Kunming 650224, China
  • Received:2020-09-04 Online:2021-08-28 Published:2021-08-31
  • Contact: Weigang ZHAO E-mail:weigang-zhao@fafu.edu.cn

摘要:

以生物质材料棕榈壳作原料,采用KOH活化方法制备高比面积活性炭,以比表面积和微孔孔容作为考察目标,分别通过单因素试验和响应面法探究不同的制备工艺条件的影响及其最优工艺参数,并考察了最佳工艺条件下制备的活性炭的储氢性能。研究结果表明:活化温度和浸渍比值对比表面积和微孔孔容均具有显著影响,以微孔孔容模型进行预测优化得到的最优工艺参数为活化温度795℃,浸渍比值3.64,制备得到的棕榈壳活性炭的平均比表面积和微孔孔容分别为3 491 m2/g和1.08 cm3/g。孔结构分析结果表明:棕榈壳活性炭主要以微孔为主,微孔率最高可到89%,也有中孔并存。从扫描电镜和透射电镜图也可以看出活性炭存在大量微孔和中孔,两者结果一致。同时棕榈壳活性炭的储氢性能优异,在-196℃和4 MPa条件下,其过量储氢量和绝对质量储氢量可分别高达6.4%和6.8%。

关键词: KOH活化, 棕榈壳, 比表面积, 微孔孔容, 储氢材料

Abstract:

The palm shell was used as precursor to prepare activated carbons with high specific surface area by KOH activation method. The specific surface area and micropore pore volume were taken as the inspection targets, the influence of different preparation process conditions was explored through single factor experiments and central composite design methods. The hydrogen storage performance of activated carbons prepared under the optimal conditions was studied. The results showed that the activation temperature and the weight ratio of KOH/palm shell char had significant effects on the surface area and micropore volume. The preparation parameters obtained after optimization were 795℃ for activation temperature and 3.64 for impregnation ratio. The average specific surface area and micropore volume of activated carbon prepared under these conditions were 3 491 m2/g and 1.08 cm3/g, respectively. The pore structure analysis results showed that palm shell-based activated carbon was mainly composed of micropores and mesopores, with the maximum microporosity of 89%. Furthermore, it could be seen from the SEM and TEM images that there were a large number of micropores and mesopores distributed in activated carbon. Meanwhile, palm shell activated carbon had excellent hydrogen storage performance. The excess and absolute hydrogen storage capacities were as high as 6.4% and 6.8% under the conditions of -196℃ and 4 MPa, respectively.

Key words: KOH activation, palm shell, specific surface area, micropore volume, hydrogen storage material

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