Zirconia-Supported Pt, Pd, Rh, Ru, and Ni Catalysts in the Hydrotreatment of Fatty Amides and Amines

Emma Verkama*, Sylvia Albersberger, Kristoffer Meinander, Marja Tiitta, Reetta Karinen, Riikka L. Puurunen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
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Abstract

Active catalysts for simultaneous hydrodeoxygenation (HDO) and hydrodenitrogenation (HDN) enable the production of fuels from renewable feedstocks. In this work, zirconia-supported nickel, ruthenium, rhodium, palladium, and platinum catalysts were evaluated in the HDO and HDN of n-hexadecanamide (C16 amide). The HDN of 1-hexadecylamine (C16 amine) was studied separately to assess the HDN activity and the preference between C-C and C-N bond cleavage routes without the interference of HDO. The differences in the catalytic activity were mainly attributed to the metal identity. Pt/ZrO2 and Ru/ZrO2 exhibited the highest activity toward the conversion of both model compounds. The C16 amide was converted more efficiently than the C16 amine over the studied catalysts, and a high HDO activity did not translate to a high activity in HDN, which was particularly evident in the case of Rh/ZrO2. The active metal strongly influenced the preferred reaction routes, as observed from differences in the yields of C15 and C16 n-paraffins and C32 condensation products. Ni/ZrO2 and Pd/ZrO2 exhibited the lowest activity and paraffin selectivity in the hydrotreatment of both model compounds. Ru/ZrO2 and Rh/ZrO2 favored the formation of n-pentadecane from both the C16 amine and C16 amide, whereas Pt/ZrO2 produced n-hexadecane and high intermediate yields of the C32 condensation products.

Original languageEnglish
Pages (from-to)4464-4479
Number of pages16
JournalEnergy and Fuels
Volume38
Issue number5
DOIs
Publication statusPublished - 7 Mar 2024
MoE publication typeA1 Journal article-refereed

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