Hydrotreating of oak wood bio-crude using heterogeneous hydrogen producer over Y zeolite catalyst synthesized from rice husk

Hamidi, Roya; Tai, Lingyu; Paglia, Laura; Scarsella, Marco; Damizia, Martina; Filippis, P. De; Musivand, Sogand; Caprariis, Benedetta de

doi:10.1016/j.enconman.2022.115348

Cited by 8 publications

(2 citation statements)

References 65 publications

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“…To that end, Figure 2 presents the hydrogen and carbon contents on a dry basis of both feed and products. By comparing the hydrogen content between the feed (Table 1) and the products (Table 4), it is observed that the hydrogen content increased in all products, as was also observed by Hamidi et al [41]. The hydrogen (on dry basis) of biocrude increased by +60% in conditions 1 and 2, but only by 49% in condition 3, confirming the importance of sufficient hydrogen supply.…”

Section: Elemental Compositionsupporting

confidence: 79%

Hydrothermal Liquefaction Biocrude Stabilization via Hydrotreatment

Dimitriadis,

Bezergianni

2024

Energies

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The main objective of the manuscript is to investigate mild hydrotreatment upgrading of hydrothermal liquefaction biocrude to improve its stability and energy content. To that end, biocrude hydrotreatment was performed, exploring three different operating windows in order to examine the effect of reaction temperature and hydrogen supply on deoxygenation reactions. A typical NiMo/Al2O3 hydrotreating catalyst was utilized while the experiments were performed in a continuous-flow TRL 3 hydrotreatment plant. The results show that the resulting product has a higher carbon content as compared to the raw feed. The oxygenated compounds were removed, leading to a product with almost zero oxygen and water content, with high energy density. The reaction pathways during the hydrotreatment upgrading of biocrude were investigated via GC-MS analysis and presented in detail in the manuscript. In general, the hydrotreating process was able to improve the quality of the initial biocrude, allowing easier handling and storing for further upgrading, or to be used as an intermediate refinery stream.

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Section: Elemental Compositionsupporting

confidence: 79%

Hydrothermal Liquefaction Biocrude Stabilization via Hydrotreatment

Dimitriadis,

Bezergianni

2024

Energies

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“…Finally, the reactor was placed in an oven at 80 • C for 24 h to dry the char. All the tests were performed in triplicate to confirm the repeatability of the results; the values reported in this study are the mean values [34].…”

Section: Methodsmentioning

confidence: 97%

Catalytic Hydrothermal Liquefaction of Brachychiton populneus Biomass for the Production of High-Value Bio-Crude

et al. 2023

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The current study focused on the heterogenous catalytic hydrothermal liquefaction (HTL) of Brachychiton populneus biomass seed, using Ni as hydrogenation catalyst and Fe as active hydrogen producer. The activity of Ni metal and of Ni/Al2O3 in the HTL of seed (BS) and of a mixture of seed and shell (BM) was studied. To establish the best operating process conditions, the influence of variation of temperature and reaction time on the product yields was also examined. The highest bio-crude yields of 57.18% and 48.23% for BS and BM, respectively, were obtained at 330 °C and 10 min of reaction time, in the presence of Ni/Al2O3 as catalyst and Fe as hydrogen donor. Elemental analysis results showed that at these operative conditions, an increase of the higher heating value (HHV) from 25.14 MJ/kg to 38.04 MJ/kg and from 17.71 MJ/kg to 31.72 MJ/kg was obtained for BS and BM biomass, respectively, when the combination of Fe and Ni/Al2O3 was used. Gas chromatography–mass spectrometry (GC-MS) and Fourier transform infrared spectroscopy (FT-IR), used to determine the oils’ chemical compositions, showed that the combined presence of Fe and Ni/Al2O3 favored the hydrodeoxygenation of the fatty acids into hydrocarbons, indeed their amount increased to ≈20% for both biomasses used. These results demonstrate that the obtained bio-crude has the capacity to be a source of synthetic fuels and chemical feedstock.

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