Simplified synthesis of K_{class="a-plus-plus">2}CO_{class="a-plus-plus">3}-promoted hydrotalcite based on hydroxide-form precursors: Effect of Mg/Al/K_{class="a-plus-plus">2}CO_{class="a-plus-plus">3} ratio on high-temperature CO_{class="a-plus-plus">2} sorption capacity

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• 作者：Hee Jin Jang ; Suji Kim ; Ki Bong Lee
• 关键词：Hydrotalcite ; Sorption ; CO2 Sorbent ; K2CO3 Promotion ; Hydrothermal Synthesis
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：34
• 期：1
• 页码：1-5
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Industrial Chemistry/Chemical Engineering; Catalysis; Materials Science, general; Biotechnology;
• 出版者：Springer US
• ISSN：1975-7220
• 卷排序：34

文摘

Hydrotalcite was synthesized from hydroxide-form precursors to prepare a novel high-temperature CO₂ sorbent, and the effect of Mg/Al ratio on CO₂ sorption was studied. To enhance the CO₂ sorption capacity of the sorbent, K₂CO₃ was coprecipitated during the synthetic reaction. X-ray diffraction analysis indicated that the prepared samples had a well-defined crystalline hydrotalcite structure, and confirmed that K₂CO₃ was successfully coprecipitated in the samples. The morphology of the hydrotalcite was confirmed by scanning electron microscopy, and N₂ adsorption analysis was used to estimate its surface area and pore volume. In addition, thermogravimetric analysis was used to measure its CO₂ sorption capacity, and the results revealed that the Mg: Al: K₂CO₃ ratio used in the preparation has an optimum value for maximum CO₂ sorption capacity.