Simultaneous Electrolysis-Carbon Capture in a Reactor with Aqueous Potassium Hydroxide

Overview

As the world works toward a greener future, scientists have researched electrolysis for hydrogen generation and carbon capture for the removal of carbon dioxide from the atmosphere. It was observed that potassium hydroxide (KOH) is a catalyst for the electrolysis reaction and can be also used to absorb carbon dioxide. Based on these observations, it was hypothesized that electrolysis and carbon capture could be done simultaneously in aqueous KOH. It was predicted that due to the bonding between carbon dioxide and KOH, the rate of hydrogen generation from electrolysis would decrease over time as the concentration of KOH in the solution declined. To conduct this experiment, a reaction chamber was built to allow for simultaneous, isolated electrolysis and carbon capture. During the experiment, the KOH concentration was adjusted from 0 g/L to 100 g/L to test whether previously observed results would remain true in the simultaneous reaction chamber. The study supported the hypothesis that simultaneous electrolysis and carbon capture in aqueous KOH can occur. The results showed no significant decrease in hydrogen generation rate over the course of the 4-hour trials. In addition, the results showed a general increase in carbon capture with increasing KOH concentrations.

Competition history

• AJAS 2025 Category not listed

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