Vortex flow plasma reforming for hydrogen production from atomized water-methanol mixture and parameter optimization using RSM and ANN-GA

Abstract

Hydrogen energy is the cleanest energy. It has many applications in different sectors, such as power generation, industrial, and transportation. The conventional H₂ production methods are energy-consuming and generate a huge amount of pollution. Hence, a non-polluting method for H₂ production is necessary to utilize the benefit of cleaner fuel. The current work used a vortex flow plasma reforming process to generate H₂ from the methanol-water mixture. The process involved plasmolysis of methanol-water mixture to produce H₂. Additionally, the process parameters like feed flow rate (0.5–4.5 LPM), methanol concentration (5–35 %) and voltage (4–8 V) were optimized using RSM and ANN-GA models, and the influencing parameters were determined using the ANOVA test. The results showed an optimal hydrogen production rate of 229.2 mol/day (for 0.3 MHz), 265.0 mol/day (for 1.7 MHz) and 285.8 mol/day (for 2.4 MHz) for RSM at 4.5 LPM and 35 % methanol concentration while 267.0 mol/day for ANN-GA at 4.5 LPM, 33.8 % methanol concentration and 7.4 kV input voltage. The optimized parameters were used in the experimental setup, and an error of 4–7 % was observed for the RSM model and 2.5 % for the ANN-GA model. Therefore, the ANN-GA model showed better reliability than the RSM model. Further, the results may be used for commercial-scale H₂ production for various applications.