液化天然气冷能与碳捕集与封存相结合的合成氨工艺的热力学和经济分析,ACS Sustainable Chemistry & Engineering

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液化天然气冷能与碳捕集与封存相结合的合成氨工艺的热力学和经济分析
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-01-25 , DOI: 10.1021/acssuschemeng.2c06841
Peizhe Cui ₁ , Yaru Zhou ₁ , Tingting Song ₂ , Zaifeng Xu ₁ , Jifu Zhang ₁ , Yangyang Liu ₁ , Yinglong Wang ₁ , HuaQing Qi ₁ , Lei Han ₃ , Sheng Yang ₄

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氨作为一种大宗化学品，广泛用于化肥和燃料，也是一种很有前途的氢载体。本研究针对降低合成氨过程的高能耗问题，创新性地提出了一种基于液化天然气再气化冷能利用的低碳合成氨工艺。该工艺利用液化天然气再气化释放的冷能作为空分装置和碳捕集与储存装置的制冷源，提高了合成氨全过程的综合能源利用效率。基于 Aspen Plus 模拟，对过程经济性和火用进行了综合分析。低碳合成氨工艺总效率为42.69%，其中合成氨产能为35台。⁷美元，产品成本为 387.86 美元。与三个不同的合成氨装置相比，低碳氨合成工艺合成氨的平准化成本降低至324.03美元/吨。所提出的工艺可以很好地解决合成氨过程中能耗高的问题，为低碳氨合成工艺提供一条有价值的生产路线。

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Thermodynamic and Economic Analysis of an Ammonia Synthesis Process Integrating Liquified Natural Gas Cold Energy with Carbon Capture and Storage

Ammonia, as a bulk chemical, is widely used in fertilizers and fuels and is also a promising hydrogen carrier. Aiming at reducing the high energy consumption of the ammonia synthesis process, this study innovatively proposed a low-carbon ammonia synthesis process based on the cold energy utilization of liquified natural gas regasification. In this process, the cold energy released from the regasification of liquified natural gas was used as the refrigeration source of the air separation unit and carbon capture and storage unit, which improves the comprehensive energy utilization efficiency of the whole process of synthetic ammonia. Based on Aspen Plus simulations, the process economy and exergy were comprehensively analyzed. The total efficiency of the low-carbon ammonia synthesis process was 42.69%, of which the ammonia production capacity was 35.07 t/h, and the total capital investment of the integrated process was 3.4 × 10⁷ USD, and the product cost was 387.86 USD. Compared with three different ammonia plants, the levelized cost of ammonia in the low-carbon ammonia synthesis process was reduced to 324.03 USD/ton. The proposed process can well solve the problems of high energy consumption in the ammonia synthesis process and provide a valuable production route for the low-carbon ammonia synthesis process.

更新日期：2023-01-25

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