Detailed process simulation of pre-combustion IGCC plants using coal-slurry and dry coal gasifiers
Detailed process simulation of pre-combustion IGCC plants using coal-slurry and dry coal gasifiers
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DOI：
10.1016/j.egypro.2013.06.099
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Z. Kapetaki;H. Ahn;S. Brandani
中科院分区：
文献类型：
--
作者：
Z. Kapetaki;H. Ahn;S. Brandani
整体煤气化联合循环（IGCC）电厂中气化炉的选择对下游工艺配置和电厂净效率都有很大影响。众所周知，与使用煤浆的通用电气能源（GEE）气化炉相比，使用干煤的壳牌气化炉具有较低的操作压力、较高的碳转化率、较低的CO2产量和较低的H2/CO比。这些差异也影响到如何配置下游过程时，IGCC是碳捕获改造。净工厂效率下降不同程度上取决于气化炉类型，如能源部NETL报告中所示。本研究的目的是阐明两种气化炉之间的差异如何对应于无碳捕集和有碳捕集的工厂性能差异。为了实现这一点，已经使用商业软件Honeywell UniSim Design R400®基于文献配置对两个IGCC工厂和集成Selexol碳捕获单元进行了详细的过程模拟。从分析的结果解释了为什么湿浆气化炉配置具有较低的净效率损失时，碳捕集单元集成。
The selection of the gasifier in an Integrated Gasification Combined Cycle (IGCC) plant affects both downstream process configurations and net plant efficiency considerably. It is well known that a Shell gasifier using dry coal has lower operating pressure, higher carbon conversion, lower CO2production and lower H2/CO ratio compared to a General Electric Energy (GEE) gasifier using coal slurry. These differences also affect how to configure downstream processes when an IGCC is retrofitted for carbon capture. The net plant efficiency decreases by different extents depending on the gasifier type as shown in the DOE NETL report The aim of this study is to elucidate how the differences between the two gasifiers correspond to the difference in plant performance without and with carbon capture. To achieve this, detailed process simulations of the two IGCC plants and an integrated Selexol carbon capture unit have been carried out based on literature configurations using the commercial software Honeywell UniSim Design R400®. From the analysis of the results an explanation is presented as to why the wet slurry gasifier configuration has a lower net efficiency loss when the carbon capture unit is integrated.