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Affecting Factors of Electrified Soot Combustion on Potassium-supported Antimony Tin Oxides by Ruixuan Weng; Xueyi Mei; Zhaoliang Zhang; Ying Xin; Jiaqiang Xu; Yexin Zhang; Jian Zhang is a Engineering article available to read on EtoBox.

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Elimination of soot particulates using catalytic combustion technologies at lower temperatures remains a big challenge for diesel engines with the ever-lowering emission temperatures. We recently reported an electrified catalysis strategy that decreased the soot ignition temperature for 50% conversion (T 50) to below 75 °C on potassium-supported antimony-tin oxides (K/ATO) (Mei et. al., Nature Catalysis, 2021, 4: 1002). However, the detailed affecting factors were not present for the sake of promptly enjoying this exiting progress. Herein, three important factors, including K loading amounts, electric power ramp rates and nitrogen oxides (NO x ), for the Electrically Powered Programmed Oxidation (EPPO) of soot were investigated on K/ATO. First, K loading enhances soot ignition but much higher K content (>1 wt%) is detrimental due to spoiling catalyst conductivity. Second, elevating the electric power ramp rate to 0.1 W min−1 reaches an apex with the promise of the balance of soot ignition conversion and energy efficiency. Finally, NO x , a promoter in traditional thermal catalysis, is overwhelmed by the tremendous active oxygen trigged from the electrification process, showing no e

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Author

Ruixuan Weng; Xueyi Mei; Zhaoliang Zhang; Ying Xin; Jiaqiang Xu; Yexin Zhang; Jian Zhang

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)