Design of multifunctional catalytic reactor for methane partial oxidation by combining Mn-hexaaluminate and MgO with uniform and non-uniform mixing methods

Huaming Dai, Hongting Wang and Ziwei Song

Applied Energy, 2024, vol. 359, issue C, No S0306261924001077

Abstract: The combination of multifunctional catalysts was beneficial to methane conversion and hydrogen production. In order to improve the synergistic effect of different functional catalysts, LaMnAl11O19 and MgO catalysts were loaded on Al2O3 pellets to prepare LaMnAl11O19/Al2O3 (LMA) and MgO/Al2O3 (MA) catalytic pellets. Through the uniform distribution and non-uniform mixing of LMA and MA, the different catalytic reactors were built to study the methane combustion performance. The results indicated that the high-activity center of Mn4+ in LMA increased methane activation rate and the abundant oxygen vacancies in MA promoted active oxygen migration. When the bed length ratio of LMA to MA was 2:2, the oxygen migration rate and methane activation rate achieved the optimal coupling and reached the highest hydrogen energy conversion efficiency of 55.5%. Meanwhile, the good low-temperature catalytic activity and the shortest stabilization time of 4322 s were obtained when the LMA was located in the inner layer. The increase of LMA and MA volume ratio under non-uniform mixing was beneficial to methane conversion and syngas production, and the volume ratio of 2:2 reached excellent high-temperature catalytic activity. Therefore, the uniform and non-uniform mixing of different functional catalysts improved the synergistic effect of catalysts and effectively adjusted the combustion performance of methane.

Keywords: Hexaaluminate; Metal oxide; Non-uniform mixing; Multifunctional catalytic reactor (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261924001077
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:359:y:2024:i:c:s0306261924001077

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2024.122724

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().