Efficient Low-Rank Coal Gasification with ScCO2 Slurry Feed

讲座名称: Efficient Low-Rank Coal Gasification with ScCO2 Slurry Feed
讲座时间 2017-09-04
讲座地点 北二楼2楼会议室
讲座人 Ahmed F. Ghoniem

应动力工程多相流国家重点实验室副主任白博峰教授的邀请,美国麻省理工学院Ahmed F. Ghoniem教授

讲座题目:Efficient Low-Rank Coal Gasification with ScCO2 Slurry Feed
Abstract: Coal and other solid fuels gasification is used in multiple technologies including electricity generation (IGCC), and syngas production for fuels and chemicals. High pressure entrained flow gasifiers are used extensively for this purpose, but their use is often limited to higher quality coals. Moreover, the cold gas efficiency is compromised by the fuel feeding system when coal-water slurry is used. This is a major concern especially when gasification is used in CO2 capture plants. Alternative system design and coal feeding technology can overcome both, utilizing CO2-coal slurry. In this talk we will demonstrate the gain in plant and cold gas efficiencies associated with the latter, and how this is especially important for extending gasification technology to lower quality coals. We show how multiscale analysis, including system level modeling of the plant that incorporates reduced order reactor models can be used to determine the impact of coal quality and operating conditions on the system including efficiency and oxygen use. Reduced reactor models are based on detailed CFD analysis, while incorporating microscale particle conversion and micro-kinetics derived for the gasification agent and coal rank. We will describe a novel feeding process that we call PHICCOS (phase inversion based CO2 slurry) for preparing the high-pressure slurry using supercritical CO2 and pulverized coal. Overall economics under uncertainty show significant advantages especially when using low rank feed.


Ahmed F. Ghoniem is the Ronald C. Crane Professor of Mechanical Engineering at MIT, and director of the Center for Energy and Propulsion Research and the Reacting Gas Dynamics Laboratory. He received his B.Sc. and M.Sc. degree from Cairo University, and Ph.D. at the University of California, Berkeley.  His research covers computational engineering, clean energy with focus on CO2 capture technologies, renewable energy and alternative fuels. He made fundamental contributions to multiscale simulations, thermochemistry and combustion, energy systems and materials chemistry.  He supervised more than 100 M.Sc., Ph.D. and post-doctoral students, published more than 500 refereed articles in leading journals and conferences, lectured extensively around the World, and consulted for the aerospace, automotive and energy industry. Ghoniem is Fellow of ASME and APS, and associate fellow of AIAA. He received several awards including the ASME James Harry Potter Award in Thermodynamics, the AIAA Propellant and Combustion Award, and the KAUST Investigator Award.

讲座视频 暂无视频

(转载文章,请注明出处: 西安交通大学学术资源平台 http://meeting.xjtu.edu.cn)