کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1333780 979106 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and CO2 capture evaluation of Li2−xKxZrO3 solid solutions and crystal structure of a new lithium–potassium zirconate phase
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis and CO2 capture evaluation of Li2−xKxZrO3 solid solutions and crystal structure of a new lithium–potassium zirconate phase
چکیده انگلیسی

Solid solutions of lithium and potassium metazirconates Li2−xKxZrO3 (where, 0⩽x⩽2) were prepared by coprecipitation. Samples were characterized by powder X-ray diffraction, scanning electron microscopy, and thermogravimetric analyses. Results showed that the solubility limits of potassium into Li2ZrO3 is x=0.2. Furthermore, at higher potassium concentrations, a new phase was synthesized, Li2.27K1.19Zr2.16O6.05. For structural studies of this new phase, XRD data were analyzed by Rietveld refinements. Additionally, at high potassium concentrations different phases of ZrO2 were found, as potassium tends to sublimate. On the other hand, lithium–potassium metazirconate solid solutions, Li2−xKxZrO3, were tested as CO2 captors. Thermal analyses into a CO2 flux showed that Li2−xKxZr2O3 solid solutions present a better CO2 absorption than Li2ZrO3 pure. The differences observed in the CO2 sorption processes were explained with thermodynamic data.

Li2−xKxZrO3 samples were synthesized and characterized by XRD, SEM, and TGA. The solubility limits of potassium into Li2ZrO3 is x=0.2. Additionally, a new phase was synthesized, Li2.27K1.19Zr2.16O6.05, which was studied by Rietveld. On the other hand, Li2−xKxZrO3 solid solutions were tested as CO2 captors. Analyses showed that Li2−xKxZr2O3 samples present a better CO2 absorption than Li2ZrO3 pure.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 180, Issue 9, September 2007, Pages 2485–2492
نویسندگان
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