报告题目: |
Fluidized Bed Reactors and Their Modelling: Past, Present and Future |
报告人: |
John R. Grace |
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加拿大University of British Columbia国际著名教授
加拿大皇家院士、工程院院士
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报告时间: |
2008-12-03 09:45 |
报告地点: |
反应工程大会议室（汽车研究所东侧） |
主办单位: |
化学工程系 |
简介: |
Dr. Grace's primary research interests are concerned with fluidized bed reactors and related multi-phase systems. Fluidized beds are used for a wide variety of chemical and physical purposes, for example in catalytic, gas-solid and three-phase reactors, drying, coating and thermal treatment.
Working closely with graduate students, fellow faculty members and other research associates, Dr. Grace has investigated a wide range of problems which are fundamental in nature, but which have practical application. Some of the topics studied in the recent past include transient forces on immersed tubes, heat transfer in the freeboard region of bubbling beds and to the walls of circulating fluidized beds, tube erosion, hydrodynamics and mixing in high velocity beds, effects of particle size distribution, reactor modelling, scale-up issues and attrition. Applications studied include fluidized bed combustion and gasification of biomass and coal, a novel process for steam reforming of natural gas to make pure hydrogen, greenhouse gas mitigation, thermal energy storage, drying of wood wafers.
The U.B.C. group has unique facilities for the study of fluidization. For example, the group operates a pilot-scale circulating fluidized bed gasification/combustion unit in which both fundamental and applied data have been obtained. There are also a number of other units of different scales and a wide variety of related equipment for characterizing the particles and obtaining in-bed measurements.
Projects now in progress or likely to be active in the near future include work related to the turbulent regime of fluidization, flow behaviour and heat transfer in fluidized beds, high-density risers, CO2 and SO2 capture, hydrogen production, flow regimes, reactor modelling, scale-up and three-phase fluidization. Closely related areas which are being investigated include spouted beds, high temperature filters and classifiers. Many of the projects are motivated by direct industrial interest. The research is funded by government and by industrial sources.
Dr. Grace is involved, in collaboration with researchers from Civil Engineering and the Department of Fisheries and Oceans, with research on the factors leading to polybrominated diethyl ethers and other brominated flame retardants being dispersed in the environment. |
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