Cesium as Alkali Promoter in Me-Cs (Me = Cu, Co, Fe)/ Al<sub>2</sub>O<sub>3</sub>Structured Catalysts for the Simultaneous Removal of Soot and NO<sub>x</sub>

• 作者: María Elena Gálvez María Jesús Lázaro Rafael Moliner Sonia Ascaso
• 来源期刊: 催化剂现代研究(英文)
• 学科: 化学
• 关键词: EXHAUST Gas Cleaning NOx Selective Reduction SOOT Oxidation CESIUM WASHCOATING Structured Catalysts
• 年，卷（期）: 2013,（3）
• 页码范围: 57-62
• 页数: 6页
• 分类号: O6

摘要

Structured catalysts for the simultaneous removal of soot and nitrogen oxides were prepared by means of coating cordierite monoliths with alumina-based suspensions containing Cu, Co or Fe and Cs as the catalytically active phase. Textural and chemical properties of the coated monoliths were determined by means of N2-physisorption, SEM and temperature programmed reduction. Their activity in the simultaneous removal of soot and NOx was assayed in a lab-scale installation, using a carbon black as diesel surrogate. Catalysts containing Cs exhibited significant activity in deNOx, however soot oxidation activity is poorly enhanced probably due to the low NO2 evolution, pointing to a different NOx adsorption mechanism in the present case, in comparison to previous observations on analogous K and Ba containing catalysts.