Issue 9, 2016

KNO3 supported on three-dimensionally ordered macroporous La0.8Ce0.2Mn1−xFexO3 for soot removal

Abstract

Three-dimensionally ordered macroporous (3DOM) La0.8Ce0.2Mn1−xFexO3 perovskites were successfully prepared by a colloidal crystal template method and KNO3-supported 3DOM La0.8Ce0.2Mn1−xFexO3 catalysts were prepared by a wetness impregnation method. Physicochemical properties of these catalysts were characterized by XRD, FT-IR, FESEM, TEM, BET, H2-TPR, O2-TPD, and XPS techniques and their catalytic performances were evaluated by soot combustion. All these perovskites possessed a well-ordered 3DOM structure, and KNO3 was highly dispersed on the skeleton of the supporters without changing the morphology and crystal structure of the perovskites. The 3DOM structure provides an increased contact area between the catalyst and soot. Besides, partial replacement of Mn by Fe into the perovskites increased the surface area and reducibility. The introduction of K ions increased the amount of active oxygen species in the catalysts, which could accelerate soot combustion at low temperature. On the other hand, the NO3 species brought by KNO3 were beneficial to the reaction at high temperature. Among all the samples, the 3DOM K/La0.8Ce0.2Mn0.6Fe0.4O3 exhibited the highest catalytic performance with the lowest T50 at 379 °C.

Graphical abstract: KNO3 supported on three-dimensionally ordered macroporous La0.8Ce0.2Mn1−xFexO3 for soot removal

Supplementary files

Article information

Article type
Paper
Submitted
25 Nov 2015
Accepted
25 Jan 2016
First published
25 Jan 2016

Catal. Sci. Technol., 2016,6, 2930-2941

Author version available

KNO3 supported on three-dimensionally ordered macroporous La0.8Ce0.2Mn1−xFexO3 for soot removal

N. Feng, J. Meng, Y. Wu, C. Chen, L. Wang, L. Gao, H. Wan and G. Guan, Catal. Sci. Technol., 2016, 6, 2930 DOI: 10.1039/C5CY02025E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements