TY - JOUR
T1 - Fate of iron during hydrothermal liquefaction of hemin
AU - Jiang, Jimeng
AU - Serago, Joseph J.
AU - Torres, Kevin
AU - Rapp, Emily
AU - Savage, Phillip E.
N1 - Funding Information:
We thank Penn State staff scientist Julie Anderson for assistance with the SEM-EDS characterization. We thank Zhongrui Zhou at UC Berkeley for analyzing samples using FT-ICR-MS. We thank Prof. Rob Rioux for access to the ICP-OES.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - 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.
AB - 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.
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U2 - 10.1016/j.supflu.2019.104705
DO - 10.1016/j.supflu.2019.104705
M3 - Article
AN - SCOPUS:85076119394
SN - 0896-8446
VL - 157
JO - Journal of Supercritical Fluids
JF - Journal of Supercritical Fluids
M1 - 104705
ER -