Authors:

Errol B Alden

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About Paper:

Catalytic alkane dehydrogenation is key to the natural gas industry as it allows for natural gases to be converted to alkenes such as ethylene which is used as feedstock in production of many chemicals. Catalysts deactivate overtime because of the formation of coke on catalysts blocking active sites. Coke is formed as hydrogens are removed from an alkane and the alkane remains adsorbed to the catalyst surface instead of desorbing. However, while there is a general understanding of how coke forms, the direct aspects are unknown. Acetylene was used as the reactant as it is a single step away from coke and it can be done at a lower temperature effectively allowing the reaction to be done slower to acquire more early-stage information. Gas chromatography mass spectrometry (GCMS), and transition electron microscopy (TEM) tested the spent catalysts to determine coke precursors and surface of the spent catalyst. This study will compare the results from a Pt, PtIn, PtIn2, and Pt3In, synthesized using incipient wetness impregnation (IWI), to learn about the formation of coke. There is research about how catalyst composition impacts coke formation but not about coke formation. The data shows that as the ratio of platinum to indium increases the activity of the catalyst increases, and as activity increases the amount of coke precursors increases. Keywords: Coking; Alkane Dehydrogenation; Catalysis; Bimetallic Nanoparticle

Source:

Purdue University / 2024

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Co-authors:

Errol B Alden