| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2017: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2016: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2015: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
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| Outline of Final Research Achievements |
The acid characteristics of MCM-68 (Si/Al=10) and dealuminated MCM-68 with Si/Al of 35, 60 and 107 were evaluated using FT-IR spectroscopy. Collidine adsorbed only on the external acid sites at 303 K. A comparison of the CO stretching vibration frequencies confirmed that MCM-68(10) possessed two types of Lewis acid sites as well as Brønsted acid sites. Lewis acid sites originating from extra-framework aluminum species were readily removed. In the case of Lewis acid sites associated with Al species connected to Si atoms via shared O atoms, the slightly stronger acid sites were easily removed via dealumination.
As an unexpected achievement, we succeeded in the synthesizing a novel aluminosilicate zeolite YNU-5, the first zeolite containing interconnected 12-, 12- and 8-ring pores as well as independent straight 8-ring channels.
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