Rainwater electrolysis for hydrogen production

Abstract

This thesis explores the viability of using rainwater for hydrogen production through electrolysis. The study addresses the critical need for alternative and sustainable water sources for electrolysis, focusing on rainwater's potential due to its relative abundance and low cost. The research involved a comprehensive set of experiments comparing the performance of rainwater against deionized water in an electrolyser system. Initial tests established a baseline by utilizing deionized water produced in a controlled laboratory environment, ensuring minimal impurities. The electrolysis process was monitored under varying voltage and current conditions, achieving the respective efficiency rates. Subsequently, rainwater was collected from various locations and subjected to the same electrolysis conditions. The results demonstrated that rainwater could achieve slightly higher efficiencies. These findings suggest that rainwater, despite its variable composition depending on geographical and environmental factors, can be a feasible alternative for hydrogen production. Another important stage of the work in question was the study and analysis of the ionic composition of rainwater. Several tests were conducted, including Inductively Coupled Plasma, Ion Chromatography and Rapid Tests. This analysis was important to establish parameters for evaluating performance. The study highlights the economic advantages of using rainwater, including lower costs associated with water sourcing and minimal processing requirements compared to deionized or distilled water. The research also identifies the need for further studies on the long-term effects of impurities found in rainwater on electrolyser components and overall system efficiency. The conclusion points towards the promising potential of rainwater as a sustainable water source for hydrogen production, encouraging future research to optimize the process and address challenges related to impurity management and system durability.

Datum der Bewilligung	2024
Originalsprache	Englisch
Betreuer/-in	Michaela Kröppl (Betreuer*in)