流态化合成石墨烯过程中的聚团流化与气相沉积及其相互耦合规律

项目名称： 流态化合成石墨烯过程中的聚团流化与气相沉积及其相互耦合规律

项目编号： No.51476100

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 能源与动力工程

项目作者： 胡国新

作者单位： 上海交通大学

项目金额： 100万元

中文摘要： 针对流化床化学气相沉积制备石墨烯过程，以纳米和微米级超细催化剂为载体，建立流化床化学气相沉积制备石墨烯反应装置，对热态合成石墨烯过程中的聚团流化特征进行在线观察和分析；研究超细催化剂载体种类、尺寸大小和反应器合成条件对流化床内气固流动特性的影响，分析不同形态和表面特性的反应性介质的相互作用，澄清颗粒分散与聚团行为以及颗粒群混合与输运特征，阐明催化剂载体上石墨烯的生长对床层流化行为的影响机理；考查不同流化特征下甲烷和氢气在团聚体中的扩散和表面吸附行为，探索流化床化学气相沉积制备石墨烯过程中超细颗粒的聚团流化特性；揭示聚团散式流化（APF）和聚团鼓泡流化(ABF)特性对化学气相沉积过程的影响机理，明确流化特征参数对石墨烯生长过程及其产物结构形态的影响规律，寻找通过添加组分来改善流化质量的影响机制，获得聚团散式流化和聚团鼓泡流化特征下石墨烯生长的热物理作用机制。

中文关键词： 流化床反应器；化学气相沉积；聚团流化；纳米颗粒；石墨烯生长

英文摘要： Ultrafine catalysts with nanometer and micrometer sizes are used as the carrier, and a fluid bed reactor is built to synthesis graphene by chemical vapor deposition (CVD) method. By using high resolution microscopy and high speed CCD camera, the agglomerating fluidization during CVD process can be observed and analyzed. The influence of reaction conditions, kind and size of the catalyst carriers on flow characteristic of gas and solid in the fluidized bed will be studied. The interactions of reactive species with different hydrophilicity or hydrophobicity are to be clarified. In order to demonstrate the influence mechanism of the graphene growth on fluidization behavior in fluid bed reactor, the dispersion and agglomeration behaviors of particles as well as the mixing and transport properties of particle clusters are to be examined. The diffusion and adsorption of CH4 and H2 in the agglomerate particles under varied agglomeration features during fluidization process will be studied. Moreover, exploration the agglomeration fluidization properties of the ultrafine particles during CVD process is one of the aims of this project. The influence of agglomerate particulate fluidization (APF) and agglomerate bubbling fluidization (ABF) on CVD process will be uncovered, and the influence mechanism of the fluidization parameters on growth and structure morphology of the graphene will be researched. For improving the fluidization quality, some extra components will be added, and the influence of adding coarse particles on graphene growth under APF or ABF conditions will be revealed.

英文关键词： Fluidized bed reactor;Chemical vapor deposition;Agglomerating fluidization;Nanoparticle;Graphene growth