Issue 8, 2024

Effect of H2S co-feeding on the performance of the Fe/SiO2 catalyst for isomerization and dehydrogenation of C5-monoolefin

Abstract

In this study, we aimed to produce isoprene, a diolefin, from a mono-olefin produced by the dehydrogenation of isopentane (iso-C5). Specifically, we attempted to isomerise 2-methyl-2-butene (2M2B), a C5 mono-olefin, followed by dehydrogenation to produce isoprene. The reaction characteristics of the Fe/SiO2 catalysts were investigated in detail. In the presence of hydrogen sulphide (H2S), 2M2B was converted to 2-methyl-1-butene (2M1B) and the target product, isoprene. However, in the absence of H2S, only the isomerisation reaction proceeded, producing 2M1B; isoprene was not produced. Notably, the isoprene yield remained almost unchanged when the concentration of H2S decreased. Furthermore, when isoprene was produced by mixing iso-C5 and mono-olefins (2M2B and 2M1B), the amount of isoprene produced was significantly higher than that from iso-C5 alone. These results indicate that our synthetic strategy is promising for isoprene production.

Graphical abstract: Effect of H2S co-feeding on the performance of the Fe/SiO2 catalyst for isomerization and dehydrogenation of C5-monoolefin

Supplementary files

Article information

Article type
Paper
Submitted
24 Oct 2023
Accepted
15 Jan 2024
First published
16 Jan 2024

New J. Chem., 2024,48, 3357-3363

Effect of H2S co-feeding on the performance of the Fe/SiO2 catalyst for isomerization and dehydrogenation of C5-monoolefin

F. Karasawa, R. Watanabe, P. Verma, Y. Miyagi, H. Yamada, S. Miyanari and C. Fukuhara, New J. Chem., 2024, 48, 3357 DOI: 10.1039/D3NJ04923J

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