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Structured glass catalytic coating on wire mesh for particulate matter (PM) removal by modified sol-gel processing
Materials Letters ( IF 3 ) Pub Date : 2019-01-01 , DOI: 10.1016/j.matlet.2018.09.093
Changsheng Su , Taren DeHart , Matt Anderson , Paul J. McGinn

Abstract K-containing soot oxidation catalysts are promising to reduce or replace noble metal usage in combustion engine emission abatement systems. In this paper, we introduce a facile approach for applying a K-containing glass catalyst onto structured wire mesh monoliths to achieve low temperature soot removal. A polyvinyl butyral (PVB) modified sol-gel process was developed to yield a crack-free thickness that is 6 times that of the conventional sol-gel process. An intermediate SiO2 barrier layer was found to be effective to insure stability of the glass catalyst over extended cycling periods. The catalytically coated wire mesh can lower the soot ignition temperature (Tig) to ∼370 °C with O2, and offers catalytic stability for long term combustion cycling.

中文翻译:

丝网上的结构化玻璃催化涂层用于通过改进的溶胶-凝胶处理去除颗粒物 (PM)

摘要 含钾碳烟氧化催化剂有望减少或替代内燃机排放减排系统中贵金属的使用。在本文中,我们介绍了一种将含钾玻璃催化剂应用于结构化丝网整料以实现低温烟灰去除的简便方法。开发了一种聚乙烯醇缩丁醛 (PVB) 改性溶胶-凝胶工艺,其无裂纹厚度是传统溶胶-凝胶工艺的 6 倍。发现中间 SiO2 阻挡层可有效确保玻璃催化剂在延长循环周期内的稳定性。催化涂层金属丝网可以将烟尘着火温度 (Tig) 降低至约 370 °C,并为长期燃烧循环提供催化稳定性。
更新日期:2019-01-01
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