Identification and Catalytic Behavior of Brønsted Acid Sites on Al-Containing ITQ-21
Identification and Catalytic Behavior of Brønsted Acid Sites on Al-Containing ITQ-21
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含铝 ITQ-21 上布朗斯台德酸位点的鉴定及其催化行为
DOI：
10.1021/jp404970k
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Toshihide Baba
中科院分区：
文献类型：
--
作者：
Akimitsu Miyaji;Yasuharu Sakamoto;Yasuyoshi Iwase; Tatsuaki Yashima;Ryutaro Koide;Ken Motokura;Toshihide Baba
为了估算含Al原子的ITQ-21（Al-ITQ-21）上的Brønsted酸中心的位置，研究了Al-ITQ-21作为固体酸催化剂的物理化学和催化性能。测定了Al-ITQ-21在不同Al浓度下的~（27）Al和~ 1H多核固体核磁共振（MASNMR）谱和NH_3程序升温脱附谱。在Al-ITQ-21上检查正庚烷的转化率。通过对27 Al MAS NMR谱的测量，确定了Al原子在Al-ITQ-21晶格中的位置。这种限制使得通过测量NH3程序升温脱附和1H MAS NMR光谱来指定与酸性质子键合的氧原子成为可能。此外，还测定了正庚烷在不同布朗斯特酸中心上转化的总反应速率。
To estimate the positions of Brønsted acid sites on ITQ-21 containing Al atoms (Al-ITQ-21), the physicochemical and catalytic properties of Al-ITQ-21 as a solid acid catalyst were investigated. The27Al and1H multinuclear solid-state nuclear magnetic resonance (MAS NMR) spectra and the NH3temperature-programmed desorption spectra of Al-ITQ-21 at several concentrations of Al were measured. The conversion ofn-heptane was examined over Al-ITQ-21. The positions of the Al atoms in the Al-ITQ-21 lattice were limited by measuring27Al MAS NMR spectra. This limitation made possible the designation of oxygen atoms bonded to acidic protons by measuring both the NH3temperature-programmed desorption and the1H MAS NMR spectra. Furthermore, the total reaction rates for the conversion ofn-heptane on different Brønsted acid sites were determined.
ITQ-21沸石作为苯与丙烯烷基化催化剂
DOI：
10.1016/s0167-2991(08)80074-2
发表时间：
2008
期刊：
影响因子：
--
作者：
A. Corma;M. Díaz;C. Martínez;F. Rey
通讯作者：
F. Rey
影响因子：
--
作者：
SENCHENYA, IN;KAZANSKY, VB;BERAN, S
通讯作者：
BERAN, S
DOI：
10.1039/f19888403777
发表时间：
1988
期刊：
影响因子：
--
作者：
H. Pfeifer
通讯作者：
H. Pfeifer