Understanding the Performance of New Amine-Functionalized Mesoporous Silica Materials for CO2 Adsorption

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• 作者：Pedro L贸pez-Aranguren ; Santiago Builes ; Julio Fraile ; Lourdes F. Vega ; Concepci贸n Domingo
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：October 8, 2014
• 年：2014
• 卷：53
• 期：40
• 页码：15611-15619
• 全文大小：432K
• ISSN：1520-5045

文摘

The current work builds on previous works on grafting of organosilanes on mesoporous silica supports using a supercritical CO₂ anhydrous method, and it extends them by examining the capacity of supercritically prepared aminosilica hybrid products for CO₂ adsorption and its separation from mixtures with other gases. The CO₂ adsorption capacity under dry conditions of mesoporous silica gel and MCM-41 functionalized with a monoaminosilane was evaluated first by recording CO₂ adsorption isotherms and next by performing microbalance cyclic adsorption/desorption experiments at 25 and 45 掳C. CO₂ adsorption and desorption rates were also studied as a function of the aminosilane loading. CO₂ adsorption results were compared to similar data available in the literature, showing improved performance for the supercritically prepared products related to the CO₂ adsorption efficiency and cyclic regenerability.