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Rate-based simulation and techno-economic analysis of coal-fired power plants with aqueous ammonia carbon capture

机译：基于速率的模拟技术和经济水分析的燃煤氨水碳捕集电厂

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Ammonia is a promising solvent for the chemical absorption of carbon dioxide owing to its characteristics of low toxicity, low degradation, low cost, and low heat of desorption. The present work evaluates the energy and economic performances of the aqueous ammonia technology applied to a coal-fired power plant. First, the kinetics of absorption are characterized in the Aspen Plus software and are calibrated against the experimental data from the Munmorah pilot plant. Then, the validated model is used for sizing the full-scale plant columns and for simulating the overall capture plant. After determining the sizes of the plant components and their energy consumptions, the capture plant is integrated with the coal-fired power plant, and the economic analysis is assessed with both retrofitted and green-field approaches as described in reports from the European Benchmarking Task Force and the United States National Energy Technology Laboratory, respectively. The novelties presented here are the new approach in the absorption reactions implemented in the rate-based model, which changes the dependency of the ammonia concentration in the absorption process, as well as the full economic analysis with both retrofitted and green-field assumptions, which enable a sound comparison of the outcomes. The results with the retrofitted approach compared with the monoethanolamine case of the European Benchmarking Task Force report returned higher electric efficiency (36.3% versus 33.50%), lower levelized cost of electricity (87.66 (sic)/MWh(el) versus 92.27 (sic)/MWh(el)), and lower cost of carbon dioxide avoided (47.03 (sic)/ton(CO2) versus 51.62 (sic)/ton(CO2)). The results using the green-field approach compared against the Cansolv case of the National Energy Technology Laboratory report returned higher electric efficiency (33.06% versus 32.50%), lower cost of electricity (124.3 $/MWh(el) versus 133.2 $/MWh(el)) and lower cost of carbon dioxide avoided (66.5 $/ton(CO2) versus 75.25 $/ton(CO2)). In both comparisons, aqueous ammonia had appreciably better performance than the ammine reference cases.
机译：氨由于其低毒性，低降解，低成本和低解吸热的特性而成为化学吸收二氧化碳的有前途的溶剂。本工作评估了应用于燃煤电厂的氨水技术的能源和经济性能。首先，吸收动力学在Aspen Plus软件中进行了描述，并根据Munmorah中试工厂的实验数据进行了校准。然后，将经过验证的模型用于确定全尺寸植物柱的大小并模拟整个捕集植物。在确定了电厂组成部分的大小及其能耗之后，将捕集电厂与燃煤电厂整合在一起，并按照欧洲基准评估工作组的报告中所述，通过改造和绿地方法对经济分析进行评估。和美国国家能源技术实验室。这里介绍的新颖性是在基于速率的模型中实施的吸收反应中的新方法，该方法改变了吸收过程中氨浓度的依赖性，以及具有改造和绿地假设的全面经济分析，能够对结果进行合理的比较。与欧洲基准工作队报告中的单乙醇胺案例相比，改进方法的结果返回了更高的电效率（36.3％比33.50％），更低的平均电费成本（87.66（sic）/ MWh（el）与92.27（sic） / MWh（el）），避免了更低的二氧化碳成本（47.03（sic）/吨（CO2）与51.62（sic）/吨（CO2））。与美国国家能源技术实验室报告的Cansolv案例相比，使用绿地方法的结果返回了更高的电效率（33.06％对32.50％），更低的电成本（124.3美元/ MWh（el）对133.2美元/ MWh（ e1）），避免了更低的二氧化碳成本（66.5美元/吨（CO2）对75.25美元/吨（CO2））。在两个比较中，氨水的性能均比氨水参考案例好得多。

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