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تحقیق و طراحی مهندسی شیمی
جزئیات رویداد
اینستاگرام تی پی بین
همایش ، رویداد ، ژورنال
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  • surface grafting of fau/emt zeolite with (3-aminopropyl)methyldiethoxysilane optimized using taguchi experimental design

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 788
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    • شماره تماس دبیرخانه رویداد: -
     a series of experiments was conducted to determine optimum conditions for grafting 3-aminopropylmethyldiethoxysilane (apmdes), on structure directing agent (sda)-free fau/emt zeolite using isopropanol (ipa) as solvent to make proper fillers for use in mixed matrix membranes. a taguchi experimental design l9 orthogonal array (oa, four factors in three levels) was employed to evaluate effects of temperature (t: 25, 65, 85 °c), reaction time (t: 6, 16, 24 h), ratio of apmdes to zeolite (sil/zl: 1, 4, 8 ml/g) and ratio of ipa to zeolite (sol/zl: 50, 125, 200 ml/g) on the percentages of amine-grafted on zeolite, bet surface area as well as equilibrium isotherm of co2 adsorption. in optimizing grafting reaction parameters, a trade-off between percentages of amine-grafted on zeolite and capacity of co2 adsorption was needed. indeed, samples having higher grafted amine exhibited lower co2 adsorption capacity, and vice versa. hence, a grafting index was defined as the product of co2 uptake and grafted aminosilane content and used as the response. the obtained results showed that increasing reaction temperature, reaction time and sil/zl ratio improved grafting index; however, this index is decreased with increasing sol/zl ratio. analysis of variance (anova) showed that all parameters had significant effects on the response. sil/zl ratio and reaction temperature were the most and the least influential factors, respectively.

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