NO Influence on Catalytic Soot Combustion: Lithium Nitrate and Gold Catalysts

被引：2
|
作者：
Ruiz, Maria L. [2 ]
Lick, Ileana D. [1 ]
Leguizamon Aparicio, Maria S. [1 ]
Ponzi, Marta I. [2 ]
Rodriguez-Castellon, Enrique [3 ]
Ponzi, Esther N. [1 ]
机构：
[1] CINDECA CCT La Plata CONICET UNLP, Fac Ciencias Exactas, Dept Quim, RA-1900 La Plata, Buenos Aires, Argentina
[2] INTEQUI CONICET UNSL, RA-5730 San Luis, Argentina
[3] Univ Malaga, Fac Ciencias, Dept Quim Inorgan Crystalog & Mineral, E-29071 Malaga, Spain
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2012年 / 51卷 / 03期
关键词：
CO OXIDATION; ZIRCONIA;
D O I：
10.1021/ie201295s
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The diesel soot combustion was studied using catalysts prepared by impregnation with lithium nitrate and/or gold on zirconium oxide (ZrO2), hydrated zirconium oxide, and silica (SiO2). Catalysts were characterized by elemental analysis, atomic absorption spectrophotometry, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Measurements of catalytic activity were performed in a fixed bed reactor with a NO/O-2 feed. The NO reacts with the Li2O generating "in situ" lithium nitrate that participates in the oxidation of diesel soot and accelerates the reaction rate. All catalysts containing lithium nitrate exhibit a good activity for soot oxidation, and the gold addition substantially increases selectivity to CO2.
引用
收藏
页码：1150 / 1157
页数：8
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