| Summary: | 碩士 === 雲林科技大學 === 環境與安全工程系碩士班 === 97 === Hydrogen is a resource with cleanness, zero pollution, and economic benefits; among all the fuels, it has the highest density, and it is the most potential for development of sustainable clean energy. By using electrolytic hydrogen to explore aquaculture. The important factors of electrolysis rate include the varied kinds and concentrations of electrolyte, and ion concentration. Adding the electrolyte affects the electric conductivity including the quality and temperature of electrolyte, and ion concentrations. For example, increasing the ionic strength and micro-bubble rate can reduce the over-voltage electrolysis of water; mixing can make it easier to leave the electrode surface for bubbles but also can change electrolytic polarization. This study focuses on the effects towards circulation of efficiency of water electrolysis with platinum plating efficiency titanium mesh.
This research studies the parameters set for the electrode (titanium mesh electrode platinum plating), electrolyte concentrations (respectively affiliation 0.01M, 0.1M, 1M concentration of NaCl, KCl and LiCl electrolyte into the KOH solution by 15%), electric current (0.5A, 1.0A , 1.5A, 2.0A), and plus a different circulation (reverse, forward) According to different flow rates (0.8mL / s, 2.6 mL / s, 4.6 mL / s, 6.6 mL / s, 8.8 mL/s). It occurs the best parameters at the temperature of 27 ± 2 ℃ by the time of 20 minutes, and it proceed to the next step of probing the changes of gas production and gas production rate.
The gas production rate decreases slightly when circulation (reverse) flow rate of 8.8mL / s than free, the difference of 4%. The minimum rate of electric resistance when flow rate is 8.8mL / s and the maximum resistances when flow rate meets 0.8mL / s. The difference is about 2.3%. The credibility are as high as 99% by using ANOVA analysis. The gas production rate was a slight decline when circulation (positive) flow rate of 4.6mL / s than in non- circulation flow. The difference was about 3.4%. The lowest electric resistance exist when the flow rate of 8.8mL / s and non-spoiler. The maximum electric resistance exist when the flow rate of 4.6mL / s. The distinction about 1.9%. The credibility was as high as 99% by using ANOVA analysis.
Additionally, by using the membrane MC-3470 (Du Pont) in electrolysis the purity of hydrogen has increased from 100% without further purification.
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