Result: Design and internal structure analysis of submicron aggregated and porous three-way catalyst particles synthesized via spray drying for enhanced CO conversion.

Title:
Design and internal structure analysis of submicron aggregated and porous three-way catalyst particles synthesized via spray drying for enhanced CO conversion.
Authors:
Ando A; Chemical Engineering Program, Department of Advanced Science and Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan., Hirano T; Chemical Engineering Program, Department of Advanced Science and Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan., Cao KLA; Chemical Engineering Program, Department of Advanced Science and Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan., Septiani EL; Chemical Engineering Program, Department of Advanced Science and Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan., Tanabe E; Hiroshima Prefectural Technology Research Institute, 3-13-26 Kagamiyama, Higashi Hiroshima, Hiroshima 739-0046, Japan., Ragadhita R; Program Studi Teknik Kimia, Universitas Pendidikan Indonesia, Jl. Setiabudhi No. 229, Bandung, West Java 40154, Indonesia., Nandiyanto ABD; Program Studi Teknik Kimia, Universitas Pendidikan Indonesia, Jl. Setiabudhi No. 229, Bandung, West Java 40154, Indonesia., Ogi T; Chemical Engineering Program, Department of Advanced Science and Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan. Electronic address: ogit@hiroshima-u.ac.jp.
Source:
Journal of colloid and interface science [J Colloid Interface Sci] 2025 May 15; Vol. 686, pp. 277-288. Date of Electronic Publication: 2025 Jan 27.
Publication Type:
Journal Article
Language:
English
Journal Info:
Publisher: Academic Press Country of Publication: United States NLM ID: 0043125 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-7103 (Electronic) Linking ISSN: 00219797 NLM ISO Abbreviation: J Colloid Interface Sci Subsets: PubMed not MEDLINE; MEDLINE
Imprint Name(s):
Publication: Orlando, FL : Academic Press
Original Publication: New York.
Contributed Indexing:
Keywords: CO oxidation; Catalytic performance; Macropore size; Mass transfer; Three-way catalyst
Entry Date(s):
Date Created: 20250203 Latest Revision: 20250226
Update Code:
20250226
DOI:
10.1016/j.jcis.2025.01.243
PMID:
39899912
Database:
MEDLINE

Further Information

The development of efficient three-way catalysts (TWCs) is crucial for reducing vehicle emissions and addressing environmental concerns. However, the widespread application of TWCs is limited by their reliance on expensive precious metals and challenges in optimizing catalytic performance at low temperatures. To address these limitations, this study presents a novel approach to designing and characterizing submicron spherical aggregated TWC particles and porous structured TWC particles, which were synthesized using a spray drying method. The objectives of this research focus on optimizing the particle size of aggregated TWC particles, analyzing the internal porous architecture of porous TWC particles, and evaluating their catalytic performance in CO conversion. The synthesis process allowed precise control over the particle size of aggregated TWC particles by adjusting the concentration of colloidal TWC nanoparticles, revealing that smaller aggregated particles (520 nm) exhibited superior CO conversion efficiency compared to larger particles (1,180 nm) due to enhanced gas accessibility. Cross-sectional and three-dimensional elemental mapping analyses of porous TWC particles provided insights into the homogeneity of elemental distribution and interconnected pore networks, critical for efficient gas transport. Furthermore, the effect of CO gas flow rate on catalytic performance was systematically investigated, demonstrating that lower gas flow rates enhanced CO conversion efficiency at reduced temperatures due to prolonged gas-catalyst contact time. This work demonstrates a clear correlation between particle size of aggregated TWC particles and their catalytic efficiency, as well as highlights the influence of gas flow rates on the catalytic activity of porous TWC particles.
(Copyright © 2025 Elsevier Inc. All rights reserved.)

Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Takashi Ogi reports financial support was provided by Japan Society for the Promotion of Science. Takashi Ogi reports a relationship with New Energy and Industrial Technology Development Organization that includes: funding grants. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.