کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4995876 | 1459431 | 2017 | 36 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Molten K2CO3-promoted high-performance Li4SiO4 sorbents at low CO2 concentrations
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Molten K2CO3-promoted high-performance Li4SiO4 sorbents at low CO2 concentrations Molten K2CO3-promoted high-performance Li4SiO4 sorbents at low CO2 concentrations](/preview/png/4995876.png)
چکیده انگلیسی
Highly efficient K2CO3-doped lithium orthosilicate (Li4SiO4) sorbents were synthesized using acid treatment to overcome the typical kinetic limitations of sorbents at low CO2 concentrations. The effects of K2CO3 on the structure and absorption properties were characterized using various morphological characterization techniques, differential scanning calorimetry (DSC) and thermogravimetric analysis (dynamic and isothermal). The results showed that different amounts of K2CO3 greatly affected the physical-chemical properties and absorption kinetics of the sorbents. On one hand, K2CO3 formed a solid solution with Li4SiO4 and generated favorable characteristics (a smaller crystal size, corrugated morphology, larger surface area and higher surface concentration of Li2O), significantly facilitating the chemisorption processes. On the other hand, a higher amount of doped K2CO3 was located on the surface, which induced molten phases during CO2 absorption, remarkably decreasing the diffusion processes. Therefore, 0.1Â M K2CO3 doped sorbent obtained noticeable absorption capacity and good regenerability in 15Â vol.% CO2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 655, 10 September 2017, Pages 284-291
Journal: Thermochimica Acta - Volume 655, 10 September 2017, Pages 284-291
نویسندگان
Zhongyun Zhou, Ke Wang, Zeguang Yin, Pengfei Zhao, Zhen Su, Ji Sun,