Regular Article

A novel hydrogen production system based on multistage reverse electrodialysis

Department of Energy and Power Engineering, Shanxi Institute of Energy, No. 63, University Street, Yuci District, Jinzhong 030600, Shanxi, P.R. China

^* Corresponding author: zhaojy@sxie.edu.cn

Received: 30 August 2024
Accepted: 21 October 2024

Abstract

Salinity gradient energy can be converted into hydrogen energy through the system combining Multi-Stage Reverse ElectroDialysis (MSRED) with polymer electrolyte membrane water electrolysis. However, the relevant performance of the system has never been investigated. In this paper, the influence of relevant parameters of MSRED on the performance of the system was analyzed theoretically through a reliable mathematical model. The results showed that increasing the flow velocity of solutions will cause a remarkable decrease in the energy recovery of the system, although the total output power and Hydrogen Production Rate (HPR) of the system increases correspondingly. Besides, thickening compartments of the high-concentration solution are effective in reducing the energy consumption for pump with a small augment in the total output power and HPR of the system, while the energy recovery of the system is still dropping slowly.