In situ FTIR studies of the selective catalytic reduction of NO by C3H6 over Pt/Al2O3
In situ FTIR studies of the selective catalytic reduction of NO by C3H6 over Pt/Al2O3
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DOI：
10.1006/jcat.1999.2463
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发表时间：
1999-06-10
影响因子：
7.3
通讯作者：
Amiridis, MD
中科院分区：
文献类型：
--
作者：
Captain, DK;Amiridis, MD
采用原位傅立叶变换红外光谱（FTIR）研究了丙烯（C3H6）在0.8 Wt% Pt/Al2O3催化剂上选择性催化还原一氧化氮（NO）。在本研究过程中，收集了Pt/Al2O3催化剂和裸Al2O3载体的光谱。NO吸附导致与Al2O3载体相关的硝酸盐种类的形成，以及与Pt相关的表面NO。同样，C3H6吸附导致与Al2O3相关的羧酸盐种类的形成，以及与Pt相关的表面CO。最后，用反应性NO-C3H6- o -2混合物进行的实验导致表面氰化物（-CN）和异氰酸酯（-NCO）种类的形成。讨论了这些物质的来源和反应活性，认为它们可能作为中间产物参与烃- scr反应。(C) 1999学术出版社。
The selective catalytic reduction (SCR) of nitric oxide (NO) by propylene (C3H6) over a 0.8 Wt% Pt/Al2O3 catalyst was studied by the use of in situ Fourier transform infrared (FTIR) spectroscopy. Spectra of both the Pt/Al2O3 catalyst as well as the bare Al2O3 support were collected during the course of this study. NO adsorption resulted in the formation of nitrate species associated with the Al2O3 support, as well as surface NO species associated with Pt. Similarly, C3H6 adsorption resulted in the formation of carboxylate species associated with Al2O3, as well as surface CO associated with Pt. Finally, experiments conducted with the reactive NO-C3H6-O-2 mixture resulted in the formation of surface cyanide (-CN) and isocyanate (-NCO) species. The origin and reactivity of these species is discussed in view of their potential involvement as intermediates in the hydrocarbon-SCR reaction. (C) 1999 Academic Press.