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
讲座人: Ahmed F. Ghoniem
形式:
校区: 兴庆校区
实践学分:
讲座内容: 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 将于9月4日(周一)在我校进行访问交流并举办两场学术讲座,欢迎感兴趣的老师和同学参加。 讲座二: 讲座题目:Efficient Low-Rank Coal Gasification with ScCO2 Slurry Feed 讲座时间:9月4号下午15:30-16:30 讲座地点:北二楼2楼会议室 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. 联系人:白博峰教授,电话82665316,邮箱bfbai@mail.xjtu.edu.cn  
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