کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8092006 | 1522004 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Alkali promoted lithium orthosilicate for CO2 capture at high temperature and low concentration
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
In this study, lithium orthosilicate (Li4SiO4) based sorbents containing different amounts of alkali carbonates (K2CO3, Na2CO3), binary (K2CO3/Li2CO3, Na2CO3/Li2CO3) and ternary (K2CO3/Na2CO3/Li2CO3) eutectic mixtures were prepared and characterized by X-ray diffraction and scanning electron microscopy. The CO2 adsorption properties of the sorbents were investigated by thermogravimetric analysis (TGA) at low CO2 partial pressure (0.04 atm) and temperatures between 500 and 600 °C. The durability of the selected sorbents was investigated by multiple CO2 adsorption/desorption cycles. The results showed that all the promoters used noticeably improved the CO2 uptake rate and sorption capacity in comparison to no-promoted Li4SiO4. At the optimum sorption temperature of 580 °C, Li4SiO4 with addition of 30 wt% of K2CO3 or Na2CO3 showed the best CO2 adsorption proprieties with sorption capacity of 230 mg CO2/g sorbent corresponding to a Li4SiO4 conversion of about 80%. But, the addition of Na2CO3 caused sintering during multiple sorption/desorption cycles reducing significantly the sorption capacity within the defined sorption time. Whereas, the sample with addition 30 wt% K2CO3 maintained its original capacity during 25 CO2 sorption/desorption cycles, showing an excellent cyclic stability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Greenhouse Gas Control - Volume 17, September 2013, Pages 25-31
Journal: International Journal of Greenhouse Gas Control - Volume 17, September 2013, Pages 25-31
نویسندگان
M. Seggiani, M. Puccini, S. Vitolo,