Selective catalytic reduction of NO

2020年第14卷第4期

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《化学科学与工程前沿（英文）》 >> 2020年第14卷第4期 doi: 10.1007/s11705-019-1847-7

Selective catalytic reduction of NO

L.V. Pisarzhevskii Institute of Physical Chemistry of the NAS of Ukraine, Kyiv 03028, Ukraine

录用日期： 2019-11-29 发布日期： 2019-11-29

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摘要

Research results regarding selective catalytic reduction (SCR) of NO with ethanol and other C oxygenates as reductants over silver-alumina catalysts are summarized. The aspects of the process mechanism, nature of active sites, role of alumina and silver (especially in the formation of bifunctional active sites), effects of reductants and reaction conditions are discussed. It has been determined that key stages of the process include formation of reactive enolic species, their interaction with NO and formation of nitroorganic compounds which transform to NCO species and further to N . The results obtained over various silver-alumina catalysts demonstrate the perspectives of their application for reducing the level of nitrogen oxides in engine emissions, including in the presence of water vapor and sulfur oxides. Ways to improve the catalysts for the SCR of NO with C oxygenates are outlined.

关键词

SCR ; nitrogen oxides ; silver-alumina catalyst ; silver species ; ethanol ; oxygenates