Development of a New C-Plus Particle Fluidized Bed Reactor

向上流动的气体穿过颗粒，最终使它们悬浮起来，形成“流化床”，这是一层悬浮颗粒，颗粒的大表面面积完全暴露在向上流动的气体中。这种“流态化”技术利用其大表面积在工业过程中得到了广泛的应用。例如，由于空气和煤颗粒之间的有效接触，通过悬浮（流化）细煤颗粒在气流中使发电中的煤燃烧非常有效。流化床最大的应用是在化学反应器中，因为悬浮颗粒与气相有良好的接触，导致非常高的反应效率。******然而，由于颗粒尺寸减小而产生的非常强的颗粒间力导致颗粒团聚，阻止了5-30微米的细颗粒在流化中使用，否则将提供更大的界面接触面积。如果能够“释放”隐藏在这些细颗粒团块中的大表面积，那么流化床的反应器效率就有很大的潜力可以翻倍甚至翻四倍。在化学工业中，即使是很小的效率提高也会带来巨大的经济效益。******根据长期在粉末涂料行业的工作经验，在30-60微米的细涂层颗粒中常规添加纳米颗粒以确保其良好的流动性，申请人最近提出了C-Plus颗粒的新理论（正在申请专利）：所谓的C-Plus颗粒主要由黏结的Geldart-C颗粒（5-30微米）和选择性的纳米颗粒组成，以“调节”黏结，使其不仅可流化，而且具有更好的流化质量。初步试验表明，与常规流化床反应器相比，C-plus颗粒流化非常平稳，床膨胀率高达200%，化学转化率高达200%。******拟建项目的短期目标是充分探索这种c +颗粒流化床，并进行参数化研究。长期目标是在过程工业中将这项技术商业化。另一个目标是扩展我们目前的流化理论，以包括关于细颗粒流化的新理论。这有望导致化学反应工程领域的重大突破。******申请人已经从事各种流化技术和细颗粒应用超过25年，所以他的团队有专业知识和必要的仪器来完成拟议的研究。申请人庞大的研究项目和丰富的培训经验，加上优良的设施，将为hqp提供最佳的培训环境。**

Upflowing gas through particles can eventually suspend them to form a “fluidized bed”, a layer of suspended particles where the large inter-facial surface area of the particles are fully exposed to the upflowing gas. This “fluidization” technology has been widely applied in industrial processes, utilizing the large surface area. For example, coal combustion in electricity generation was made very efficient by suspending (fluidizing) fine coal particles in the air stream given the effective contact between air and coal particles. The largest application of fluidized bed is in chemical reactors because the suspended particles have excellent contact with the gas phase, leading to very high reaction efficiency. ******However, particle agglomeration due to very strong inter-particle forces, arising from the reduced particle size, has prevented the use of fine particles of 5-30 microns in fluidization, which would otherwise provide even larger interfacial contact areas. There exists a huge potential to double or even quadruple the reactor efficiency of fluidized beds if one can “release” the large surface area hidden in the agglomerates of those fine particles. In chemical industry, even a small increase in efficiency will lead to huge economic benefits. ******Originating from his long term working experience with the powder coating industry where nano particles have been routinely added into fine coating particles of 30-60 microns to ensure their good flowability, the applicant has recently proposed a new theory of C-Plus particles (patent pending): The so-called C-Plus particles consist of primarily cohesive Geldart-C particles (5-30 microns) and selected nano-particles to “modulate” the cohesion, making them not only fluidizable but with better fluidization quality. Preliminary tests have shown that the C-plus particles fluidize very smoothly with up to 200% high bed expansion and up to 200% chemical conversion compared to regular fluidized bed reactors. ******The short term objective of the proposed project is to fully explore this C-plus particle fluidized bed, with parametric study. The long term objective is to commercialize this technology in the process industry. An additional objective is to expand our current fluidization theory to include new theory on the fluidization of fine particles. This is expected to lead to a major breakthrough in the field of chemical reaction engineering. ******The applicant has been working on various fluidization technologies and fine particle applications for over 25 years, so his group has the expertise and the necessary instrumentations to complete the proposed research. The great research project and the extensive training experiences of the applicant, plus the excellent facility, will provide the best training environment for HQPs. **