Less Costly Catalysts for Controlling Engine Emissions

Perovskite oxide catalysts may be able to control emissions from more fuel-efficient internal combustion engines and replace expensive noble metals. Lowering the fuel consumption of transportation vehicles could decrease both emissions of greenhouse gases and our dependence on fossil fuels. One way...

Full description

Saved in:
Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2010-03, Vol.327 (5973), p.1584-1585
Main Author: Parks, James E.
Format: Article
Language:English
Subjects:
ADVANCED PROPULSION SYSTEMS
AIR
Automotive engineering
Carbon dioxide emissions
CATALYSTS
CATALYTIC CONVERTERS
Diesel exhaust
Diesel vehicles
EFFICIENCY
Emission control systems
Emission standards
Emissions reduction
ENGINES
FOSSIL FUELS
FUEL CONSUMPTION
Fuels
GREENHOUSE GASES
INTERNAL COMBUSTION ENGINES
NITROGEN OXIDES
OXIDES
PEROVSKITE
Perspectives
PLATINUM
POLLUTANTS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Perovskite oxide catalysts may be able to control emissions from more fuel-efficient internal combustion engines and replace expensive noble metals. Lowering the fuel consumption of transportation vehicles could decrease both emissions of greenhouse gases and our dependence on fossil fuels. One way to increase the fuel efficiency of internal combustion engines is to run them “lean,” in the presence of more air than needed to burn all of the fuel. It may seem strange that engines are usually designed to run with fuel and air at stoichiometric balance, or even fuel rich. However, the way emissions have been controlled with catalytic converters has required some unburned fuel in the exhaust, especially for controlling the nitrogen oxide pollutants NO and NO 2 (called NO x ). On page 1624 of this issue, Kim et al. ( 1 ) report encouraging results for catalysts that can process NO x in lean-burn engines. These perovskite oxide catalysts may help reduce or even eliminate the need for expensive and scarce platinum group metals (PGMs) in emissioncontrol catalysts.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1187154