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document
Wang, Y. (author), Makkee, M. (author)
Oxygen defects in reduced ceria are the catalytic sites for the NO reduction into N<sub>2</sub> in the Toyota Di-Air DeNO<sub>x</sub> abatement technology. Traces of NO (several hundred ppm) have to compete with the excess amount of other oxidants, e.g., 5% CO<sub>2</sub> and 5% O<sub>2</sub>, in an exhaust gas of a lean burn (diesel) engine....
journal article 2018
document
Wang, Y. (author), Oord, Ramon (author), van den Berg, D. (author), Weckhuysen, Bert M. (author), Makkee, M. (author)
Currently commercial NO<sub>x</sub> removal (DeNO<sub>x</sub>) abatement systems for lean-burn engines exceed regulation limits on the road for NO<sub>x</sub> emissions. Commercial DeNO<sub>x</sub> catalysts exhibit poor performance in the selective conversion of NO to N<sub>2</sub>, especially at high temperature and high gas hourly space...
journal article 2017
document
Wang, Y. (author), Posthuma De Boer, J (author), Kapteijn, F. (author), Makkee, M. (author)
Temporal analysis of product (TAP) is used to investigate the effectiveness of CO, C<sub>3</sub>H<sub>6</sub>, and C<sub>3</sub>H<sub>8</sub> in the reduction of a La–Zr doped ceria catalyst and NO reduction into N<sub>2</sub> over this pre-reduced catalyst. Hydrocarbons are found to be substantially more effective in the reduction of this...
journal article 2016