权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of Mass-Production Technique of Carbon Nanohorn Based on Arc discharge Method

基于电弧放电法的碳纳米角量产技术开发

基本信息

批准号：
15310087
负责人：
TAKIKAWA Hirofumi
金额：
$ 8.45万
依托单位：
Toyohashi University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15310087/
关键词：
Carbon nanohorn particle Arc discharge Mass production Continuous operation Apparatus development 収率向上

项目摘要

Carbon nanohorn (CNH), which has a cone shape structure with rounding a graphene sheet, usually forms secondary particle (CNH particle) with approximately 50 nm diameter. CNH particle is greatly interested in the use of the electrode with dispersion of metal catalyst in direct methanol fuel cell (DMFC). Presently, mass-production technique has been developing by the laser evaporation method using an expensive high-power CO_2 laser. On the other hand, the investigators had found that the CNH particle could produce by inexpensive arc discharge method. In the present project, the purpose is that the technique of mass production of CNH particle with arc discharge method is established. The principal outcomes are as follows.1st year: The production condition of dahlia-like CNH particle with high-yield up to 80 %, was found in the present arc discharge apparatus. The amount was more than 1.5 g in 1 batch (less than 1 min.). Based on this result, a new apparatus that can operate for 1 hour wa … More s roughly designed.2nd year: A new apparatus for continuous production was designed in detail and partially made. In order to increase the yield, the relation between the product (arc soot) and operation condition (arc current, gas species, gas pressure) was investigated in old apparatus, and separation process using sieve, ultrasonic separator, nanomizer, and centrifugal separator, was examined. The arc soot was process in high-temperature and it was found that some of the arc soot transformed to carbon nanoballoon.Last year: In order improve the new apparatus for continuous production of CHN particle, the pressure control system, gas introduction system, and soot collection system was fitted up. The relation between the product (arc soot) and operation condition (arc current, gas species, gas pressure) was investigated in the new apparatus. As a result, the target production yield was achieved at higher pressure. However, it was found that the new apparatus was necessarily modified in electrode feed system. Moreover, it was found that non-dahlia-like CNH is suitable for DMFC electrode rather than the dahlia-like CNH. Less

碳纳米角（CNH）具有石墨烯片的圆形圆锥形结构，通常形成直径约为50 nm的二次颗粒（CNH颗粒）。CNH颗粒在直接甲醇燃料电池（DMFC）金属催化剂分散电极中的应用引起了人们极大的兴趣。目前，大规模生产技术已经发展到使用昂贵的高功率CO_2激光器的激光蒸发方法。另一方面，研究人员发现CNH粒子可以通过廉价的电弧放电方法产生。本课题的目的是建立电弧放电法大量制备CNH颗粒的技术。主要成果如下：第一年：在现有的电弧放电装置上，找到了高产率达80%的大丽花状CNH颗粒的生产条件。在1个批次中的量大于1.5 g（小于1 min）。在此基础上，研制了一台能连续工作1小时的新装置， ...更多信息第二年：详细设计并部分制造了一种用于连续生产的新装置。为了提高产品的收率，在旧设备上研究了产品（电弧烟灰）与操作条件（电弧电流、气体种类、气体压力）之间的关系，并考察了使用筛、超声分离器、纳米粉碎机和离心分离器的分离过程。电弧烟尘在高温下进行处理，发现部分电弧烟尘转化为碳纳米球。去年：为了改进连续生产CHN颗粒的新装置，安装了压力控制系统、气体引入系统和烟尘收集系统。在新装置上研究了电弧产物（碳烟）与操作条件（电弧电流、气体种类、气体压力）之间的关系。结果，在较高压力下实现了目标生产收率。但是，发现新装置在电极进给系统上有必要进行改进。此外，发现非大丽花状CNH而不是大丽花状CNH适合于DMFC电极。少