"Green" Ammonia: Impact of Renewable Energy Intermittency on Plant Sizing and Levelized Cost of Ammonia
"Green" Ammonia: Impact of Renewable Energy Intermittency on Plant Sizing and Levelized Cost of Ammonia
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DOI：
10.1021/acs.iecr.8b02447
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发表时间：
2018-10-31
影响因子：
4.2
通讯作者：
Wilkinson, Ian
中科院分区：
文献类型：
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作者：
Nayak-Luke, Richard;Banares-Alcantara, Rene;Wilkinson, Ian
氨生产目前占全球工业二氧化碳排放量的近11%，占全球排放量的1.3%。在全球排放目标和不断增长的需求的背景下，非常需要该过程的脱碳。我们提出了一种方法来计算第一估计的最佳规模的氨生产厂（在工艺水平），所需的可再生能源（RE）的供应，和氨（LCOA）的平准化成本孤岛运行与氢缓冲。开发了一个模型，以定量确定影响LCOA的关键变量（相对于LCOA的+/- 10 GBP/吨变化）：平准化电力成本（+/- 0.89 GBP/MWh）、电解槽资本支出（+/- 65 GBP/kW）、最小哈伯-博世（HB）负荷（额定功率的+/- 12%）、HB负荷斜升的最大速率和RE供应组合。使用2025/2030年估计值，苏格兰勒威克的LCOA为588英镑/吨。该模型的应用将促进和改善未来的无碳氨生产。
Ammonia production currently contributes almost 11% of global industrial carbon dioxide emissions, or 1.3% of global emissions. In the context of global emission targets and growing demand, decarbonization of this process is highly desirable. We present a method to calculate a first estimate for the optimum size of an ammonia production plant (at the process level), the required renewable energy (RE) supply, and the levelized cost of ammonia (LCOA) for islanded operation with a hydrogen buffer. A model was developed to quantitatively identify the key variables that impact the LCOA (relative to a +/- 10 GBP/tonne change in LCOA): levelized cost of electricity (+/- 0.89 GBP/MWh), electrolyzer capital expenditure (+/- 65 GBP/kW), minimum Haber-Bosch (HB) load (+/- 12% of rated power), maximum rate of HB load ramping, and RE supply mix. Using 2025/2030 estimates results in a LCOA of 588 GBP/tonne for Lerwick, Scotland. The application of the model will facilitate and improve the production of carbon-free ammonia in the future.