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中南大学学报(自然科学版)

Journal of Central South University

第52卷    第1期    总第317期    2021年1月

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文章编号:1672-7207(2021)01-0313-17
化学链技术在低碳制氢领域的研究进展
郑浩1,孙朝2,曾亮1

(1. 天津大学 化工学院,绿色合成与转化教育部重点实验室,天津,300072;
2. 中南大学 能源科学与工程学院,湖南 长沙,410083
)

摘 要: 化学链技术可以在能量转化的同时实现气体分离,为低碳氢气的生产提供一条清洁高效的路线。本文对化学链制氢过程的特点进行介绍,分析三床化学链自热重整制氢和吸收增强式化学链制氢过程的设计原则,并总结循环载体研究与开发进展。从热力学角度对金属氧化物进行分类,引入平衡线与操作线分析铁基化学链制氢系统中氧载体和反应器内部气固流动形式的匹配,指导整体系统的设计优化。对吸收增强式化学链制氢过程的开发进行回顾,引入二氧化碳载体可以推动反应平衡向氢气生成方向移动,节省水蒸气用量,直接得到高纯度氢气,强化低碳制氢流程。对国内外循环载体材料的发展以及反应机理的探究进行总结,发现其中双金属氧载体材料性能突出,有待进一步研究。

 

关键词: 制氢;化学链;氧载体

Research progress of chemical looping technology for low-carbon hydrogen generation
ZHENG Hao1, SUN Zhao2, ZENG Liang1

1. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. School of Energy Science and Engineering, Central South University, Changsha 410083, China

Abstract:Chemical looping technology can integrate the separation of gas products with energy conversion processes, which offers a clean and efficient route for the generation of low-carbon hydrogen. The characteristics of the chemical looping hydrogen generation were introduced, and the design principles of the three-reactor chemical looping autothermal reforming process and the sorption-enhanced chemical looping process for hydrogen generation were analyzed. Then, the research and development progress of oxygen carriers were summarized. The metal oxides were classified from the perspective of thermodynamics, and the equilibrium line and the operation line were introduced to analyze the iron-based chemical looping hydrogen generation system and the gas-solid flow pattern, so as to guide the design and optimization of the overall system. The development of sorption-enhanced chemical looping hydrogen generation process was also reviewed. By introducing the CO2 carrier, the reaction equilibrium can be shifted towards the hydrogen generation direction, directly obtaining high-purity hydrogen with reduced steam consumption, and thus enhancing the process of low-carbon hydrogen generation. The development of oxygen carrier materials and the study on reaction mechanism are summarized, and bimetallic oxygen carrier materials are promising for future research and development.

 

Key words: hydrogen generation; chemical looping; oxygen carrier

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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