储能科学与技术2025，Vol.14Issue(1)：175-182,8.DOI:10.19799/j.cnki.2095-4239.2024.0622
分段供热策略提高氨分解率和能量利用效率的研究
Study of a segmented heating strategy to improve ammonia decomposition rate and energy utilization efficiency
摘要
Abstract
Ammonia decomposition for hydrogen production is critical in ammonia-hydrogen energy storage systems.Electrically heated hydrogen production,catalyzed for high efficiency and flexibility,has emerged as the most widely adopted method.This paper proposes a new heating strategy,i.e.,segmented heating of the ammonia decomposer,to enhance the ammonia decomposition rate and energy utilization efficiency.The decomposer is subjected to simulation analysis based on the Temkin-Phyzev reaction kinetics and the plug flow reactor models.The parameters of the decomposer under uniform heating are analyzed to determine the temperature distribution and molar fractions of each component within the reactor,thereby clarifying the factors influencing energy utilization efficiency.Compared with the ammonia decomposition rate and energy utilization efficiency across the five heating coverage rates,we optimized the optimal configuration parameters,verified the principle of segment heating,and analyzed the energy utilization efficiency to confirm the rationality of segment heating.The results indicated that the decomposition rate of ammonia decomposition is faster,and the energy requirement is greater in the inlet section of the decomposer.Under a constant total energy supply,segmented heating significantly enhances the ammonia decomposition rate and energy utilization efficiency.The concentration of energy supply at the front end enhances ammonia decomposition efficiency and reduces the discharge gas temperature at the outlet.The rate of ammonia decomposition remains relatively stable when the energy supply segment ratio is less than 20%.This study is crucial for improving the ammonia decomposition rate and energy utilization efficiency,offering significant insights for developing ammonia-hydrogen energy storage technology.关键词
氨分解制氢/分段式供热/能量利用效率/氨(氢)储能Key words
ammonia decomposition to produce hydrogen/segmented heating/energy utilization efficiency/ammonia(hydrogen)energy storage分类
能源科技引用本文复制引用
刘斌,康宗耀,王欣,刘伟,庄竣博,陈文俊,折晓会..分段供热策略提高氨分解率和能量利用效率的研究[J].储能科学与技术,2025,14(1):175-182,8.基金项目
河北省科技厅战略科技专项(23319904L) （23319904L）
河北省科学院基本科研业务费制度试点项目(2024PF02). （2024PF02）
