Pt Catalyst over SiO_2 and Al_2O_3 Supports Synthesized by Aerosol Method for HCSCR DeNOx Application

Riyan Zahaf ； Jae Wook Jung ； Zachary Coker ； Songkil Kim ； Tae-Youl Choi ； Dong-Geun Lee

《Aerosol and Air Quality Research》 15卷6S期 (2015/11) Pp. 2409-2421

https://doi.org/10.4209/aaqr.2015.03.0202

並列摘要

Silica-supported platinum (Pt/SiO_2) and alumina-supported platinum (Pt/Al_2O_3) catalysts have been prepared by an aerosol spray pyrolysis method. Systematic characterization of each catalyst using TEM, XRD, and XPS revealed that crystalline and metallic Pt nanoparticles were well dispersed on the surface of silica and alumina supports. The sintering effect on Pt particles over Al_2O_3 at high temperature (~250℃) is more prominent than those over SiO_2; this suggests that there is stronger interaction between Pt particles and SiO_2 support, when compared to Pt over Al_2O_3 support, resulting in Pt particles size below 3 nm. Moreover, steady-state catalytic experiments for selective reduction of nitrogen monO_xide by propene have demonstrated that NO_x conversions to N_2O and N_2 in Pt/SiO_2 and Pt/Al_2O_3 catalysts are 29.8% and 55.8% at 250°C, respectively.

並列關鍵字

Pt/SiO_2 ； Pt/Al_2O_3 ； Aerosol ； DeNOx Catalyst