Investigation of Low Temperature Emissions Control Catalysts
Todd Toops, ORNL
Oxidation catalysts in emissions control systems generally contain Pd/Pt and require exhaust temperatures above 200 Â°C to operate, but under low-temperature conditions, oxidation of CO and hydrocarbons are challenging. As engine efficiency improves and exhaust temperature decreases, there is an increasing demand for high emissions control performance at low temperatures. Therefore, it becomes imperative to design new catalysts that are active at low operating temperatures. A series of catalysts will be discussed that are aimed at meeting these challenges in addition to strategies for achieving 90% conversion at temperatures as low as 150 °C.