Effect of preparation methods on NOx removal ability by sorption in Pt–ZrO2–Al2O3
- 5 October 2001
- journal article
- Published by Elsevier BV in Applied Catalysis A: General
- Vol. 219 (1-2), 107-116
- https://doi.org/10.1016/s0926-860x(01)00672-x
Abstract
Heterogeneous porous materials of Pt–ZrO 2 –Al 2 O 3 are prepared via three different procedures based on impregnation and/or ammonia precipitation to examine their ability for NO x removal by sorption. In case a sample was prepared via ammonia precipitation, the sample exhibited both a larger BET surface area and a higher NO removal ability than a sample prepared only via impregnation. The experimental results indicate that a high-temperature calcination is essential to remove residual Cl from Pt–ZrO 2 –Al 2 O 3 prepared from H 2 PtCl 6 in order to provide more active NO x sorption sites. This suggestion was supported by the experimental results: (1) the sample prepared using H 2 PtCl 6 as a Pt source should be calcined at a higher temperature after the Pt source was added in order to exhibit a higher sorption ability, and (2) the use of Cl-free Pt sources enhanced the NO x sorption capacity even after calcination at a lower temperature.Keywords
Funding Information
- Ministry of Education, Culture, Sports, Science and Technology
This publication has 15 references indexed in Scilit:
- DeNOx catalyst for automotive lean-burn engineCatalysis Today, 1996
- Influence of chlorine ions in Pt/A12O3 catalysts for methane total oxidationCatalysis Today, 1996
- Reversible Sorption of Nitrogen Oxides in Mn–Zr OxideJournal of Catalysis, 1996
- Removal of Dilute Nitrogen Oxide by the Absorption in Mn–Zr OxideBulletin of the Chemical Society of Japan, 1995
- Alumina-Supported Manganese Oxide Catalysts: II. Surface Characterization and Adsorption of Ammonia and Nitric OxideJournal of Catalysis, 1994
- Metal exchanged ferrierites as catalysts for the selective reduction of NOx with methaneApplied Catalysis B: Environment and Energy, 1993
- Selective catalytic reduction of nitric oxide by ethene on gallium ion-exchanged ZSM-5 under oxygen-rich conditionsApplied Catalysis B: Environment and Energy, 1993
- Promotive Effects of the Addition of Alkaline Earth Metals to Ce-ZSM-5 Catalyst for the Reduction of Nitrogen Monoxide in the Presence of Propene and OxygenChemistry Letters, 1992
- Selective Reduction of NO with Propylene on Fe-silicate CatalystsChemistry Letters, 1991
- No removal by absorption into BaO-CuO binary oxidesJournal of the Chemical Society, Chemical Communications, 1990