| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Outline of Final Research Achievements |
Inorganic reverse osmosis membranes for acid separation have been developed. The membranes were prepared by using a counter diffusion CVD method using Diphenyldimethoxysilane having two phenyl groups as a silica source. High rejection of sulfuric acid over 90 % with the total flux of 17.6 kg m-2 h-1 was found through the membrane deposited at 270 °C. The flux was more than three times higher than the target flux. Next, the influence on the sulfuric acid durability was investigated by changing the membrane substrates. The membrane deposited on a γ-alumina substrate showed no selectivity after immersion in sulfuric acid for 48 hours, while the membrane deposited on a silica substrate kept its selectivity. We found that the membrane substrates have a great influence on acid durability.
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