Fate of iron during hydrothermal liquefaction of hemin

Jimeng Jiang, Joseph J. Serago, Kevin Torres, Emily Rapp, Phillip E. Savage

Research output: Contribution to journalArticle

Abstract

Hemin, an iron porphyrin, was used as a model compound to study the fate of iron during hydrothermal liquefaction (HTL). Hemin decomposed hydrothermally and produced an oil-phase with appreciable iron content only at temperatures exceeding 250 °C. Both the temperature of and the time in the hydrothermal environment affect the iron concentration in the oil from hemin HTL, with severe conditions leading to lower iron concentrations. Catalysts (Ni/Al2O3-SiO2) and solvents (MTBE) that were effective in algal HTL biocrude demetallation also reduced iron concentrations in oil from hemin HTL. Iron porphyrinic species were identified in the oil from hemin HTL. They were much less prevalent when a Ni/Al2O3-SiO2 catalyst was also used, which points to the effectiveness of catalytic HTL for demetallation of the oil. In addition, there were many species in the oil products with two nitrogen atoms, which formed from hemin decomposition.

Original languageEnglish (US)
Article number104705
JournalJournal of Supercritical Fluids
Volume157
DOIs
StatePublished - Mar 1 2020

Fingerprint

liquefaction
Hemin
Liquefaction
Iron
Oils
oils
iron
catalysts
Catalysts
Porphyrins
porphyrins
nitrogen atoms
Nitrogen
Decomposition
decomposition
Atoms
Temperature
temperature
products

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Jiang, Jimeng ; Serago, Joseph J. ; Torres, Kevin ; Rapp, Emily ; Savage, Phillip E. / Fate of iron during hydrothermal liquefaction of hemin. In: Journal of Supercritical Fluids. 2020 ; Vol. 157.
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Fate of iron during hydrothermal liquefaction of hemin. / Jiang, Jimeng; Serago, Joseph J.; Torres, Kevin; Rapp, Emily; Savage, Phillip E.

In: Journal of Supercritical Fluids, Vol. 157, 104705, 01.03.2020.

Research output: Contribution to journalArticle

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AU - Jiang, Jimeng

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AU - Torres, Kevin

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AU - Savage, Phillip E.

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