Multifunctionalized Ordered Mesoporous Carbon as an Efficient and Stable Solid Acid Catalyst for Biodiesel Preparation

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• 作者：Binbin Chang ; Jie Fu ; Yanlong Tian ; Xiaoping Dong
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：March 28, 2013
• 年：2013
• 卷：117
• 期：12
• 页码：6252-6258
• 全文大小：392K
• 年卷期：v.117,no.12(March 28, 2013)
• ISSN：1932-7455

文摘

The hydrophobic surface of ordered mesoporous carbon (OMC) via a hard-template route is difficult to sulfonate, which limits its practical applications in solid acid catalysis. Here, we reported an OMC solid acid catalyst with large surface area and ordered mesostructure, as well as high acidity. The pretreatment of hard-template prepared OMC with H₂O₂ brought numerous hydrophilic groups onto the carbon surface, which are favorable for the modification of 鈭扴O₃H groups by a followed sulfonation treating with sulfuric acid. The results of X-ray diffraction, N₂ adsorption鈥揹esorption, and transmission electron microscopy demonstrated the preservation of large surface area and ordered mesostructure. Infrared spectra indicated the successful modification of 鈭扴O₃H groups and in the meantime suggested the existence of hydrophilic groups (鈭扖OOH and 鈭扥H). The acidity of catalyst estimated by an indirect titration method and the modified amount of 鈭扴O₃H groups examined by energy dispersive spectra were 2.09 mmol H^+聽g^鈥? and 1.86 mmol 鈭扴O₃H g^鈥?, respectively. Such multifunctionalized OMC material with hydrophilic groups (鈭扴O₃H, 鈭扖OOH, 鈭扥H) and the hydrophobic framework (polycyclic aromatic carbon) showed evidently improved catalytic activities for biodiesel production. Furthermore, its excellent stability and recycling property were demonstrated by five consecutive cycles.