کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8046588 | 1519076 | 2014 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microwave assisted acid treatment of sepiolite: The role of composition and “crystallinity”
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
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چکیده انگلیسی
Three sepiolites with differences in composition and structural ordering were treated with 0.2Â N HCl and 0.2Â N HNO3 solutions assisted with microwave radiation. This treatment caused in the firsts 16Â min the progressive Mg2Â + depletion of the octahedral sheet, the gradual degradation of the sepiolite structure and the formation of an amorphous silica phase which contributes to a noticeable increase of the BET specific surface area. The assistance of microwaves during the acid treatment allows us to get specific surface areas equivalent to those obtained after 48Â h with conventional heating methods. The influence of mineralogical impurities, “crystallinity” and chemical composition on the reactivity of sepiolite were also studied.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Clay Science - Volume 102, December 2014, Pages 15-27
Journal: Applied Clay Science - Volume 102, December 2014, Pages 15-27
نویسندگان
F. Franco, M. Pozo, J.A. Cecilia, M. BenÃtez-Guerrero, E. Pozo, J.A. MartÃn RubÃ,