CIESC Journal ›› 2020, Vol. 71 ›› Issue (5): 2283-2291.DOI: 10.11949/0438-1157.20191468

• Energy and environmental engineering • Previous Articles     Next Articles

Experimental study on the hydrogen production with RED reactor powered by concentration gradient energy

Shiming XU(),Zhiqiang LIU,Xi WU,Youwen ZHANG,Junyong HU,Debing WU,Qiang LENG,Dongxu JIN,Ping WANG   

  1. Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2019-12-04 Revised:2020-01-14 Online:2020-05-05 Published:2020-05-05
  • Contact: Shiming XU

溶液浓差能驱动的逆电渗析反应器制氢实验研究

徐士鸣(),刘志强,吴曦,张又文,胡军勇,吴德兵,冷强,金东旭,王平   

  1. 大连理工大学能源与动力学院,海洋能源利用与节能教育部重点实验室,辽宁 大连 116024
  • 通讯作者: 徐士鸣
  • 作者简介:徐士鸣(1957—),男,教授,博导,xsming@dlut.edu.cn
  • 基金资助:
    国家自然科学基金项目(51776029)

Abstract:

The hydrogen production technology by low-grade heat (LGH) is that the LGH is first converted to the concentration gradient energy (CGE) of solutions, and then it is converted to hydrogen energy by reverse electrodialysis (RED) reactor. In order to verify the hydrogen production with RED reactor powered by CGE, and to explore the influence of key operating parameters on the energy conversion process, an experimental system of hydrogen production with RED reactor powered by CGE was developed. The RED reactor in the system consisted of 40 membrane pairs and NaCl and NaOH aqueous solutions were used as the working solutions and the electrode rinse solution respectively. By changing the inlet concentration of diluted or concentrated solution, the flow velocity of solution and the output current, the effects of those parameters on the hydrogen production rate, hydrogen production and energy conversion efficiencies were investigated experimentally. The results showed that the variations of inlet concentrations and the flow velocity would significantly affect the output current of RED reactor. Under the short circuit condition of the external circuit, the larger the output current, the higher the hydrogen production rate and hydrogen production efficiency of the reactor, but the lower the energy conversion efficiency.

Key words: reverse electrodialysis, concentration gradient energy, hydrogen production, membranes, ion exchange, energy conversion

摘要:

低品位热能制氢技术首先是将热能转换为溶液浓差能,然后通过逆电渗析(RED)反应器将溶液浓差能转换成氢能。为了验证RED反应器能将溶液浓差能转换为氢能,探索关键运行参数变化对能量转换过程的影响。设计了一个由40个膜对所构成的RED反应器,以NaCl水溶液为工作溶液,NaOH水溶液为电极液的制氢系统。通过改变浓/稀溶液入口浓度,溶液过膜流速以及输出电流来考察对RED反应器产氢率、制氢效率和能量转换效率的影响。实验结果发现,浓/稀溶液入口浓度,过膜流速变化均会影响RED反应器的输出电流。在外电路短接条件下,输出电流越大,反应器产氢率和制氢效率越高,但能量转换效率越低。

关键词: 逆电渗析, 溶液浓差能, 制氢, 膜, 离子交换, 能量转换

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