Preparation and SO2 Sorption/Desorption Behavior of an Ionic Liquid Supported on Porous Silica Particles

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• 作者：Zhengmin Zhang ; Linbo Wu ; Jie Dong ; Bo-Geng Li ; Shiping Zhu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2009
• 出版时间：February 18, 2009
• 年：2009
• 卷：48
• 期：4
• 页码：2142-2148
• 全文大小：241K
• 年卷期：v.48,no.4(February 18, 2009)
• ISSN：1520-5045

文摘

The ionic liquid 1,1,3,3-tetramethylguanidinium lactate (TMGL) was supported onto porous silica particles via a facile impregnation−vaporization method. The TMGL-supported particles gave high porosity and large specific surface area. The SO₂ sorption/desorption properties of the silica-supported TMGL (TMGL−SiO₂) were evaluated, and high SO₂ sorption capacity and rate were achieved. Its capacity reached 0.6 g SO₂/g TMGL in 15−30 min with pure SO₂ gas and 0.15 g SO₂/g TMGL in 17 h with a N₂/SO₂ mixture gas that contained 2160 ppm SO₂. The SO₂ concentration was reduced to 12.6 ppm after sorption. The TMGL−SiO₂ system could be reused for many sorption/desorption cycles without change in its capacity. It was also characterized by good mechanical strength and thermal stability at temperature up to 130 °C. The SO₂ sorbent system appears to be useful in gas desulfurization.