Publication: Optimization of catalyst for electrolysis and sonoelectrolysis processes to produce hydrogen
| datacite.subject.fos | oecd::Engineering and technology::Mechanical engineering::Mechanical engineering | |
| dc.contributor.author | Soon Pak Hen | |
| dc.date.accessioned | 2025-09-10T08:13:29Z | |
| dc.date.available | 2025-09-10T08:13:29Z | |
| dc.date.issued | 2024-07-01 | |
| dc.description.abstract | This study investigates the optimization of hydrogen production rate and energy efficiency in sonoelectrocatalysis using ZnO, Cu2O, and graphene catalysts, aiming to achieve maximum performance under ultrasound-assisted electrolysis. The research objectives include simulating the acoustic and flow field attributes of sonoreactors using CFD models in COMSOL Multiphysics V5.5. The study also includes comprehensive simulations of chemical kinetics modeling, crucial for understanding the underlying bubble dynamics mechanism in sonochemical processes. The findings of the experiment demonstrate that sonoelectrolysis can enhance hydrogen production by 10-20%, although energy efficiency must be carefully balanced due to the impact of higher current input and ultrasonic energy. The role of catalysts is critical, and this research evaluates the effects of three types of catalysts and their concentrations on maximizing hydrogen production and energy efficiency. Design of Experiments (DOE) was employed to set up a strategic experiment, with Response Surface Methodology (RSM) and Analysis of Variance (ANOVA) used for analysis. Both sonoelectrocatalysis and electrocatalysis processes were optimized to achieve the best possible responses. For electrocatalysis, the optimal conditions were found with a ZnO catalyst concentration of 2.668 g/L, yielding a hydrogen production rate of 57.6 cm³/h and an energy efficiency of 7.85%. The model predictions closely aligned with experimental results, showing errors of 5.74% for hydrogen production and 2.87% for energy efficiency, thus validating the model's accuracy. In the case of sonoelectrocatalysis, using 0.1 g/L of graphene achieved a hydrogen production rate of 66.4 cm³/h with an energy efficiency of 2.43%, despite a desirability of 0.893. The experimental errors were 2.38% for hydrogen production and 0.41% for energy efficiency, indicating the robustness of the optimization techniques. These results underscore the potential of the optimized processes for practical applications in sustainable energy solutions. This study provides a guideline for the optimized type of catalyst and its concentration to maximize hydrogen production rate and efficiency for green hydrogen productio | |
| dc.identifier.uri | https://erepo.usm.my/handle/123456789/22563 | |
| dc.language.iso | en | |
| dc.title | Optimization of catalyst for electrolysis and sonoelectrolysis processes to produce hydrogen | |
| dc.type | Resource Types::text::report::research report | |
| dspace.entity.type | Publication | |
| oairecerif.author.affiliation | Universiti Sains Malaysia |