NOx Selective Catalytic Reduction (NOx-SCR) by Urea: Evidence of the Reactivity of HNCO, Including a Specific Reaction Pathway for NOx Reduction Involving NO + NO2,ACS Catalysis

当前位置： X-MOL 学术 › ACS Catal. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

NOx Selective Catalytic Reduction (NOx-SCR) by Urea: Evidence of the Reactivity of HNCO, Including a Specific Reaction Pathway for NOx Reduction Involving NO + NO2
ACS Catalysis ( IF 11.3 ) Pub Date : 2016-05-27 00:00:00 , DOI: 10.1021/acscatal.6b00785
M. Seneque ₁ , F. Can ₁ , D. Duprez ₁ , X. Courtois ₁

Affiliation

To treat the NOx emissions from diesel vehicles, NOx selective catalytic reduction (SCR) process by NH₃ requires the use of a precursor: an urea aqueous solution. Using an innovative experimental synthetic gas bench adjusted to powdered catalysts and allowing the use of urea or ammonia, the competitive reactivity of the HNCO intermediate species was evidenced. This intermediate species was found to be highly reactive toward NO₂, without NOx reduction. During the SCR process, a mix of both NO and NO₂ was evidenced to react with HNCO and contribute to the NOx reduction efficiency, resulting in an original pathway.

中文翻译：

尿素对NOx的选择性催化还原（NO _x -SCR）：HNCO反应性的证据，包括涉及NO + NO _2的NOx还原的特定反应途径

为了处理柴油车辆的NOx排放，通过NH _3进行的NOx选择性催化还原（SCR）工艺要求使用前体：尿素水溶液。使用创新的实验性合成气工作台，将其调整为粉末状催化剂，并允许使用尿素或氨水，证明了HNCO中间体的竞争性。发现该中间物种对NO ₂具有高反应性，而没有NO x还原。在SCR过程中，NO和NO ₂的混合物被证明会与HNCO反应并有助于NOx的还原效率，从而形成原始路径。

更新日期：2016-05-27

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南