A new solid acid for specifically cleaving the C_arC_alk bond in di(1-naphthyl)methane

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• 作者：Xiao-Ming Yue^a ; Xian-Yong Wei^a ; ^{wei_xianyong@163.com} ; Bing Sun^a ; Ying-Hua Wang^a ; Zhi-Min Zong^a ; Xing Fan^a ; Zi-Wu Liu^a ; ^b
• 关键词：Coal liquefaction ; Di(1-naphthyl)methane ; Hydrocracking ; Specific cleavage
• 刊名：Applied Catalysis A ; General
• 出版年：2012
• 期刊代码：4_0926860x
• 类别：ch
• 出版时间：28 May, 2012
• 卷：425-426
• 期：Complete
• 页码：79-84
• 文件大小：818 K

摘要

Three catalysts were prepared by impregnating the same volume of pentachloroantimony (PCA), trimethylsilyl trifluoromethanesulfonate (TMSTFMS), or isometric PCA and TMSTFMA into an activated carbon (AC). Di(1-naphthyl)methane (DNM) was used as a coal-related model compound to evaluate their catalytic activity. The results show that C_arC_alk bond in DNM can be specifically cleaved over each catalyst to afford naphthalene and 1-methylnaphthalene under pressurized hydrogen at temperatures up to 300 掳C, but as a new solid acid (NSA), PCA-TMSTFMS/AC is significantly more active for DNM hydrocracking than the other two catalysts. FTIR and SEM analyses reveal the strong interactions among PCA, TMSTFMS, and the AC in the NSA. NH₃-TPD analysis suggests that the NSA should exhibit appreciably stronger acidity than the other two catalysts. The strong interactions may result in the appreciably stronger acidity of the NSA than that of the other two catalysts and thereby facilitate DNM hydrocracking. It is presumed that H₂ was heterolytically cleaved to immobile H^{鈭?/sup> and mobile H+. The addition of mobile H+ to ipso-position of DNM should be crucial step for DNM hydrocracking.}