Investigating Green Hydrogen Production in Africa: A Comprehensive Study
As global attention increasingly shifts towards green and carbon-free fuels, the promise of green hydrogen production has emerged as a significant solution for addressing CO2 emissions and energy sustainability. In a new study presented at the ATI Conference 2024 (4-6 September 2024 https://www.atinazionale.it/congresso-2024), authors Stefano Barberis, Massimo Rivarolo, Aurora Portesine, and Aristide Massardo explore the potential of green hydrogen production through electrolysis, particularly in the African context. We are proud to share an overall view of the paper, written under the WP2 activities of our project.
Context and Objectives
The paper examines the feasibility of using solar-powered green hydrogen production across three case studies in Africa: Kenya, Mali, and South Africa. The analysis focuses on evaluating the energy and economic implications of hydrogen production, while also considering the Water-Energy-Food (WEF) nexus—a key factor in sustainable development. The study aims to address challenges related to water purification, energy costs, and land use, all critical to scaling hydrogen as a clean energy source for remote communities.
Key Findings
- Water Treatment Feasibility: The study compared three different water sources—groundwater, river water, and seawater—and their respective impacts on hydrogen production. Even in the most energy-intensive scenario (seawater in South Africa), the energy consumption of water treatment was minimal. This indicates that water treatment is not a significant barrier to green hydrogen production.
- Solar Potential and Levelized Cost of Hydrogen (LCOH): In Kenya and Mali, favorable solar conditions lead to promising LCOH values. Both regions demonstrated an optimal photovoltaic (PV) installation size of around 1.8 MW, with hydrogen production reaching 62–68 tons annually. South Africa, despite slightly higher LCOH and a larger required PV size of 2 MW, remains feasible for green hydrogen production, though with a lower capacity factor.
- Optimized Scenarios: The study found that in all scenarios, without considering potential surplus electricity sales, the LCOH values were still competitive. Factoring in surplus energy sales could further reduce costs, making the technology even more viable for local communities.
- Sustainability of Water Usage: Hydrogen production’s water intensity was found to be comparable to agricultural water use. This suggests that, from a water consumption standpoint, green hydrogen is sustainable, particularly when considering the availability of water resources in the studied regions.
- Land Use and Agriculture: The total land required for Power-to-Hydrogen plants was largely dictated by the size of the PV installations. Despite this, the equivalent food production area lost due to land occupation was minimal in all three scenarios, confirming the limited impact on agricultural production.
Conclusion
This study provides a comprehensive assessment of green hydrogen production in Africa, demonstrating that the process is both technically and economically feasible. The findings highlight the immense potential for solar-powered hydrogen in supporting remote communities and addressing energy needs, while also emphasizing the sustainability of water use and the minimal impact on agricultural land.
As the global energy landscape shifts, this research marks an important step toward harnessing Africa’s renewable energy potential to produce green hydrogen, a key component in the transition to a cleaner and more sustainable future.
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