Selective catalytic reduction(SCR) technology is an effective means to reduce NOx emissions. In the urea-SCR system of diesel engine, urea decomposition plays an important role in the NOx reduction process. The current research status of urea decomposition was elaborated with a focus on discussing the reaction pathways and temperatures of by-products. In addition, the catalytic effect of catalysts on urea decomposition was briefly discussed, and four measures to reduce deposits were summarized. Finally, three directions for future technological improvement were proposed: studying the detailed reaction mechanism under actual operating conditions, using detailed decomposition mechanisms for numerical simulation while reducing time cost, and using catalysts to increase the reaction rate of intermediates.
ZHANG Yujiao
,
HUANG Haozhong
,
ZHANG Lina
,
CHEN Yajuan
. Research Progress on Urea Decomposition in Selective Catalytic Reduction System[J]. Vehicle Engine, 2024
, 0(3)
: 10
-17
.
DOI: 10.3969/j.issn.1001-2222.2024.03.002
