Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 110, Issue -, Pages 178-187Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2022.02.050
Keywords
Structured catalysts; Catalytic partial oxidation; Ruthenium; Fecralloy monolith; SiC monolith; Hydrogen
Funding
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20203030030080]
- National Research Council of Science & Technology (NST) - Korea Institute of Energy Research (KIER) ?
- National Research Council of Science & Technology (NST) - Korea Institute of Energy Research (KIER) Postdoctoral Fellowship Program for Young Scientists at KIER in Republic of Korea
- Korea Evaluation Institute of Industrial Technology (KEIT) [20203030030080] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The catalytic activity of structured catalysts composed of Fecralloy and SiC monoliths was evaluated and compared to a conventional pellet catalyst. The structured catalysts exhibited higher performance but had stability issues under high flow rates.
The catalytic activity of structured catalysts comprising Fecralloy and SiC monoliths coated with Ru/Mg-Al oxide by deposition-precipitation was evaluated in the partial oxidation of natural gas and compared with that of a conventional pellet catalyst. The geometric surface area (GSA) of the Fecralloy and SiC monolithic catalysts were 377.0 x 10(-4) and 118.5 x 10(-4) m(2), respectively; significantly larger than that of the 0.5% Ru/Al(2)O(3 )pellet catalyst (89.6 x 10(-4) m(2)). Owing to the high GSA of the structured catalysts, a small amount of Ru (0.070-0.12 wt%) resulted in highly dispersed uniform loading. Thus, the structured catalysts exhibited higher performance for catalytic partial oxidation at varying C/O-2 ratio, inlet temperature, and gas hourly space velocity (GHSV) than the pellet catalyst. However, in a stability test at high GHSV (50,000 h(-1)), the CH4 conversion of the Fecralloy monolithic catalyst decreased rapidly from 90% to less than 70% in 150 min. In addition, the Mg-Al oxide layer of the Fecralloy monolithic catalyst was damaged owing to material deterioration, resulting in a loss of Ru particles. In contrast, CH4 conversion catalyzed by the SiC monolithic catalysts remained above 85% even after 1000 min, and the material or support layer was not damaged even under severe conditions. (c) 2022 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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