Journal
CERAMICS INTERNATIONAL
Volume 42, Issue 13, Pages 14384-14390Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.06.003
Keywords
Cordierite honeycomb; Washcoating; High loading; Uniform coating
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Funding
- National Key Research Program of China [2013CB933200]
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Cordierite honeycomb with high loading and uniform coating of gamma-Al2O3 was prepared by a facile one-step dip coating strategy. The gamma-Al2O3 obtained loading, which was as high as 30%, could be calculated according to the different weight of bare and washcoated cordierite honeycomb. SEM micrographs showed that coarser surface and round channels were formed, demonstrating complete coverage of a gamma-Al2O3 layer on cordierite. The coating thickness was 30 gm, corresponding very well to the theoretical value, indicating a homogeneous coating of gamma-Al2O3. Besides, no crack was observed on the surface or the corner of the channel wall. The washcoat exhibited excellent adherence with no significant weight loss after 3 h ultrasonic treatment, attributing to the nail-like strong interaction between the support and the washcoat. The derived PdCl2-CuCl2 monolith catalyst showed excellent activity and stability for CO oxidation at room temperature in microreactor. The catalyst was also effective in pilot-scale test using the diesel exhaust as feed gas, presenting a great application prospect. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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