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Techno-economic analysis for hydrogen-burning power plant with onsite hydrogen production unit based on methane catalytic decomposition
Energy Conversion and Management ( IF 10.4 ) Pub Date : 2023-01-18 , DOI: 10.1016/j.enconman.2023.116674
Yifu Li, Hesheng Yu, Xinghua Jiang, Guorui Deng, John Z. Wen, Zhongchao Tan

Hydrogen (H2) is the fuel of the future since it only produces water as the combustion product. This paper proposes a rational design of a hydrogen-burning power plant integrated with an onsite hydrogen production unit. The H2 production from natural gas is achieved by converting the CH4 to gaseous H2 and solid carbon product based on CH4 catalytic decomposition. Fe-based catalyst is suggested for the onsite production of H2 because it results in the lowest net-levelized cost of electricity (LCOE) compared to using Ni-based and activated carbon catalysts. The mole fraction of H2 in the fuel increases with the increase of natural gas bypass ratio and CH4 conversion rate from 10 to 100%, and the maximum mole fraction of H2 reaches 93.3%. The studied hydrogen-burning power plant can reduce the CO2 emission by 80.2% compared to direct power generation from natural gas at the cost of 44% less power due to the lower heating value of H2 compared to CH4. It is noted that selling the carbon product becomes an important income source to subsidies the plant cost. However, the increase in the catalyst price and the decrease in the carbon selling price may hinder the profitability of the power plant. Finally, a set of natural gas bypass ratios and CH4 conversion rates is recommended to ensure the power plant produces at least 80% of the electricity compared to the direct power generation from natural gas; it also achieves a more competitive net-LCOE even under the catalyst cost and carbon selling price varying to 300 and 40%, respectively.



中文翻译:

甲烷催化分解就地制氢燃氢电厂技术经济分析

氢气 (H 2 ) 是未来的燃料,因为它只产生水作为燃烧产物。本文提出了一种与现场制氢装置集成的氢燃烧电厂的合理设计。从天然气生产H 2是通过将CH 4转化为气态H 2和基于CH 4催化分解的固态碳产物来实现的。建议将 Fe 基催化剂用于 H 2的现场生产,因为与使用 Ni 基和活性炭催化剂相比,它的净平准化电力成本 (LCOE) 最低。燃料中H 2的摩尔分数随着天然气旁通比和CH的增加而增加4转化率从10%提高到100%,H 2的最大摩尔分数达到93.3%。由于与 CH 4相比,H 2的热值较低,因此所研究的氢气燃烧发电厂与天然气直接发电相比可以减少 80.2%的 CO 2排放量,同时节省 44% 的电力。值得注意的是,销售碳产品成为补贴工厂成本的重要收入来源。然而,催化剂价格的上涨和碳销售价格的下降可能会阻碍电厂的盈利能力。最后,一组天然气旁通比和 CH 4建议采用转换率,以确保发电厂生产的电力至少为天然气直接发电的 80%;即使在催化剂成本和碳销售价格分别为 300 和 40% 的情况下,它也实现了更具竞争力的净 LCOE。

更新日期:2023-01-19
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