Off-Grid System for Production of Green Hydrogen via Electrolysis of Industrial Effluents: A Technical Analysis.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides a detailed simulation model of an off-grid hydrogen production system integrating renewable energy, electrolysis, and effluent treatment, offering a baseline for future studies with high-resolution data and lifecycle analysis.

🏢実務担当者:Highlights the technical feasibility and environmental benefits of using industrial effluents for hydrogen production, useful for companies exploring on-site decarbonization and waste-to-value solutions.

This study evaluates, through simulation, the technical feasibility and highlights the environmental benefits of a proposed off-grid system for electrolytic green hydrogen production using industrial effluents and solar photovoltaic and wind energy (Off-Grid GH2PS). The simulations compare the operational dynamics of the current scenario (grid electricity and natural gas) of an industry located in northeastern Brazil with those of the proposed system (renewable electricity, PEM electrolyzer, effluent conditioning system, battery storage, and hydrogen-natural gas blending). The results show strong solar-wind complementarity, with irradiance ranging from 4.77-6.92 kWh/m2/day and wind speeds from 5.04-8.49 m/s, resulting in a total generation of 1.91 GWh/year, of which 62% came from solar energy. Of this amount, the electrolyzer consumed 1.36 GWh/year (84% of the demand). Hydrogen production reached 17,976 kg/year, and annual consumption totaled 17,262 kg. The 10% hydrogen blending into natural gas reduced natural gas use by 3%, but it required a 6.5% increase in volumetric flow. Effluent conditioning showed low seasonal variability and delivered 486.8 m3/year, although only 27% reached the electrolyzer due to purification losses. It was observed that 27.54 kgH2O/kgH2 and an energy consumption of 75.90 kWh/kgH2 were required. Environmental performance showed an emission reduction of 10.99% (465.5 tCO2eq/year). Overall, the Off-Grid GH2PS demonstrates a strong potential for industrial decarbonization in regions with high availability of renewable resources and effluents. Finally, future studies should incorporate high-resolution temporal data sets, integrate degradation models for system components, and enable dynamic coupling between water treatment and the energy-hydrogen subsystems. A detailed life-cycle assessment is also recommended to strengthen the overall sustainability analysis, as well as an economic feasibility evaluation of the proposed system.

• semanticscholar https://doi.org/10.1021/acsomega.5c08182first seen 2026-05-15 19:20:07