Exhibition 2017 / 2016
Technology for the next generation cars
Technology for the next generation cars
- ・Carbon material for electric car battery
- ・Electrode catalyst for fuel cell
- ・High performance activated carbon sheet
Catalyst technology for the gasoline engine cars
Catalyst technology for the gasoline engine cars
- ・GPF Catalyst
- ・Material to suppress Knox emission at engine restart
(SRR-MIX) - ・The new oxygen storage material (pCP)
- ・NSR Catalyst
Catalyst technology for the diesel engine cars
Catalyst technology for the diesel engine cars
- ・Catalyst system for NOx purification
(HC-SCR) - ・Catalyst for DPF (Meshwork Catalyst)
- ・SCR-Filter system catalyst
CORPORATE SITE
Catalyst technology for the gasoline engine cars
persistent Ceria-Zirconia Pyrochlore type solid solution (pCP)
Material that expanded active region at oxygen concentration fluctuation
Developed new oxygen storage material that "Oxygen storage characteristic" is different from existing material. It has "Characteristic of large storage capacity" as well as "Slow in oxygen storage".
Development background of the new oxygen storage material
CeO2-ZrO2 solid solution (CZ) adjusts fluctuating atmosphere of emission in the 3-way automotive catalyst. In the purification activity, it has an oxygen storage capacity (OSC) that keeps reduction activity especially of nitrogen oxide (NOx). Recent years, technology to reduce NOx emission is required in order to deal with "Emission gas regulation" which is getting to be more severe. So we focused on "NOx emission behavior" in the oxygen concentration variation range in emission gas and aimed at "Expanding active region when variation of oxygen concentration." Then we have successfully developed "New oxygen storage material (＝pCP：persistent Ceria-Zirconia Pyrochlore type solid solution)" that its active region is expanded when oxygen concentration variation. This technology has been jointly developed by Toyota Central R&D Labs., Inc., Toyota Motor Corporation, and Cataler. We received Chemical Technology Award from The Chemical Society of Japan in March 2015, and Technology Award from The Ceramic Society of Japan in June 2016.
Material that expanded active region at oxygen concentration fluctuation
With existing materials for processing catalyst, nitrogen oxide(NOx) was not purified when oxygen flow was more than storage capacity because precious metal was deactivated due to "low capacity of oxygen storage" Our "New oxygen storage material (pCP)" has LARGE storage capacity and SLOW storage characteristics so it is possible to occlude excess oxygen. In fact, it is possible to purify "NOx" maintaining activated condition by keeping metallic state of precious metal.
Firefly structure
Pyrochlore structure
Effect of the new oxygen storage material
Our new oxygen storage material has large capacity and "slow oxygen storage characteristics "so it is possible to get closer to "oxygen storage characteristic "that is desired as catalyst compared to existing material. Therefore, it can drastically suppress "NOx" emission in the oxygen concentration variation region.
