1,3-Butadiene Adsorption over Transition Metal Polycation Exchanged Faujasites

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• 作者：Albert M. Tsybulevski ; Leonid M. Kustov ; Kerry C. Weston ; Alexander A. Greish ; Olga P. Tkachenko ; Alexey V. Kucherov
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：May 23, 2012
• 年：2012
• 卷：51
• 期：20
• 页码：7073-7080
• 全文大小：336K
• 年卷期：v.51,no.20(May 23, 2012)
• ISSN：1520-5045

文摘

New adsorbents for butadiene removal from liquid and gas streams, which are transition metal (Cu, Zn, Mn) polycation exchanged zeolites, were prepared on the basis of low-silica and dealuminated faujasites by ion exchange with the corresponding salt solutions at the conditions of their partial hydrolysis. Obtained samples were characterized by XANES, ESR, and DRIFT spectroscopy along with equilibrium and dynamic adsorption studies. It is shown that transition metal polycation containing faujasites significantly surpass monocation analogues with respect to butadiene adsorption capacity. It is also found that an enhanced ability to adsorb butadiene is peculiar to faujasites with strong acidity that defines the activity of the adsorbent in the oligomerization of adsorbed butadiene. The suggested adsorbents are fully regenerable at gradual elevation of regeneration temperature up to 250鈥?50 掳C.