کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
620497 | 1455174 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis, adsorption and regeneration of nanoporous silica aerogel and silica aerogel-activated carbon composites
ترجمه فارسی عنوان
سنتز، جذب و بازسازی سیلیکا نانوذره ای آئروژل و سیلیس آلیاژی کربن فعال کامپوزیت
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
چکیده انگلیسی
Usage of aerogels as an adsorbent has become more widespread because of its specifications such as high porosity and specific surface. Nanometer silica aerogel and silica aerogel-activated carbon composites were synthesized using a water glass precursor by ambient pressure drying method. Then, the adsorption capacity of synthesized adsorbents was studied in terms of benzene and ethyl benzene adsorption by chromatography method for continuous and batch testing. Results showed that silica aerogel and silica aerogel-activated carbon composites had high tendency for benzene and ethyl benzene adsorption. Silica aerogel showed maximum adsorption capacity of 2.3 g gâ1 and 0.7 g gâ1 in static adsorption of benzene and ethyl benzene respectively. Also, in dynamic adsorption of benzene and ethyl benzene, silica aerogel had maximum equilibrium adsorption capacity of 0.954 g gâ1 and 0.219 g gâ1 respectively. Minimum equilibrium adsorption capacity in benzene and ethyl benzene static adsorption was related to activated carbon with 0.7 g gâ1 and silica aerogel-2 wt% activated carbon with 0.25 g gâ1 respectively. After adsorption process, silica aerogel and silica aerogel-0.5 wt% activated carbon composite were regenerated by solvent extraction-thermal treatment method and, after at least 15 adsorption/desorption cycles, their adsorption capacity became fixed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Research and Design - Volume 94, February 2015, Pages 475-484
Journal: Chemical Engineering Research and Design - Volume 94, February 2015, Pages 475-484
نویسندگان
Akbar Mohammadi, Jafarsadegh Moghaddas,