Dynamic operation and modelling of amine-based CO2 capture at pilot scale
Dynamic operation and modelling of amine-based CO2 capture at pilot scale
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DOI：
10.1016/j.ijggc.2018.08.016
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发表时间：
2018-12-01
影响因子：
3.9
通讯作者：
Mac Dowell, Niall
中科院分区：
文献类型：
--
作者：
Bui, Mai;Tait, Paul;Mac Dowell, Niall
本研究结合了中试工厂实验和动态建模，以深入了解关键工艺参数之间的相互作用，从而产生基于胺的CO2捕集过程的动态响应。UKCCSRC PACT中试装置的三种动态方案：（i）部分负荷汽提，（ii）捕集装置斜升，（iii）再沸器解耦。这些情景代表了非基载CCS电站的实际灵活运行。实验工厂数据被用来验证gCCS开发的动态模型。在捕集厂爬坡方案中，增加的液气比（L/G）导致更高的CO2捕集率。部分负荷汽提方案表明，热水流量直接影响再沸器温度，这反过来又影响贫溶剂负荷和CO2捕集率。重沸器解耦方案展示了类似的关系。关闭再沸器的热量供应导致再沸器温度逐渐下降，这增加了贫溶剂负载并降低了CO2捕获率。吸收塔温度分布受CO2捕集程度的影响。对于导致较低的贫溶剂负载的情况，吸收器温度曲线向较高的温度偏移（由于较高的CO2捕获率）。
This study combines pilot plant experiments and dynamic modelling to gain insight into the interaction between key process parameters in producing the dynamic response of an amine-based CO2 capture process. Three dynamic scenarios from the UKCCSRC PACT pilot plant are presented: (i) partial load stripping, (ii) capture plant ramping, and (iii) reboiler decoupling. These scenarios are representative of realistic flexible operation of non-baseload CCS power stations. Experimental plant data was used to validate a dynamic model developed in gCCS. In the capture plant ramping scenario, increased liquid-to-gas (L/G) ratio resulted in higher CO2 capture rate. The partial load stripping scenario demonstrated that the hot water flow directly affects reboiler temperature, which in turn, has an impact on the solvent lean loading and CO2 capture rate. The reboiler decoupling scenario demonstrates a similar relationship. Turning off the heat supply to the reboiler leads to a gradual decline in reboiler temperature, which increases solvent lean loading and reduces CO2 capture rate. The absorber column temperature profile is influenced by the degree of CO2 capture. For scenarios that result in lower solvent lean loading, the absorber temperature profile shifts to higher temperature (due to the higher CO2 capture rate).