Development of a packed bed reactor for carbon nanotube synthesis

碳纳米管合成填充床反应器的研制

• 批准号: 2266611
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2266611
• 关键词: Development; packed; bed; reactor; carbon

Abstract: Carbon nanotubes (CNTs) are one of the most attractive materials of the future that can be used in a range of applications from structural buildings to use in super-conductors. Commonly used materials such as copper, aluminium and steel are outperformed by CNT's mechanical, electrical and thermal properties on the nanoscale relative to their density. However, there are problems and issues that come from manufacturing nanomaterials on an industrial scale. The properties that are found on the nanoscale do not translate to the macro scale and their synthesis is very energy intensive. Further, there are issues surrounding current synthesis techniques which are used in academia and on small laboratory scales in industry. Floating catalyst chemical vapour deposition (FC-CVD) is one of the most promising routes for industrial scale-up however, there are issues concerning the reactor density and the carbon conversion. Both require an improvement in order for the process to become feasible.This proposal will address the issue of understanding the concentration of all species at which aerogel forms. The methods to analyse the distribution of nanoparticles within the reactor both axially and radially will be performed via aerosol collection techniques. Once the fundamental reaction kinetics and concentrations of the chemically relevant species are both known and understood, the reaction will be put into a higher reaction density reactor. The data from this study will be used for modelling aerosol dynamics within the reactor and coupled with computational fluid dynamics model.Further, this proposal will outline the design and creation of a pseudo packed bed reactor in which the catalyst precursors are delivered to the point at which the carbon has broken down into subsequent radicals. The reactor design and build including all materials used, will focus closely on providing a solution to the mass production of high quality carbon nanotubes.

摘要：碳纳米管（CNT）是未来最具吸引力的材料之一，可用于从结构建筑到超导体的一系列应用。通常使用的材料，如铜，铝和钢是优于CNT的机械，电气和热性能的纳米级相对于其密度。然而，在工业规模上制造纳米材料存在一些问题和问题。在纳米尺度上发现的特性不能转化为宏观尺度，它们的合成是非常耗能的。此外，目前的合成技术在学术界和工业界的小实验室规模上使用，存在一些问题。浮动催化剂化学气相沉积（FC-CVD）是最有前途的工业放大路线之一，然而，存在关于反应器密度和碳转化率的问题。这两个都需要改进，以便使该过程变得可行。本提案将解决了解气凝胶形成时所有物质的浓度的问题。将通过气溶胶收集技术分析反应器内纳米颗粒的轴向和径向分布。一旦基本的反应动力学和化学相关物质的浓度都是已知的和理解的，反应将被放入一个更高的反应密度反应器。本研究的数据将用于模拟反应器内的气溶胶动力学，并与计算流体动力学模型相结合。此外，本提案将概述伪填充床反应器的设计和创建，在该反应器中，催化剂前体被输送到碳已分解为后续自由基的点。反应器的设计和建造包括使用的所有材料，将密切关注为高质量碳纳米管的大规模生产提供解决方案。