Upgrading of Pyrolysis Bio-Oil by Catalytic Hydrodeoxygenation, a Review Focused on Catalysts, Model Molecules, Deactivation, and Reaction Routes

Molecules, Год журнала: 2024, Номер 29(18), С. 4325 - 4325

Опубликована: Сен. 12, 2024

Biomass can be converted into energy/fuel by different techniques, such as pyrolysis, gasification, and others. In the case of biomass a crude bio-oil around 50-75% yield. However, direct use this is impractical due to its high content oxygenated compounds, which provide inferior properties compared those fossil-derived bio-oil, petroleum. Consequently, needs upgraded physical processes (filtration, emulsification, among others) and/or chemical (esterification, cracking, hydrodeoxygenation, others). contrast, hydrodeoxygenation (HDO) effectively increase calorific value improve acidity viscosity bio-oils through reaction pathways decarbonylation, decarboxylation, hydrocracking, hydrogenation, where catalysts play crucial role. This article first focuses on general aspects biomass, subsequent production, properties, various methods upgrading pyrolytic value, pH, viscosity, degree deoxygenation (DOD), other attributes. Secondly, particular emphasis placed process converting model molecules via HDO using based nickel combined with active elements. Through these phases, readers gain deeper understanding mechanisms involved. Finally, equipment used obtain an improved product from discussed, providing valuable insights for practical application in pyrolysis production.

Язык: Английский

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ZSM-23-Supported Nickel Phosphide Catalysts for n-Alkane Hydroisomerization

Catalysis Letters, Год журнала: 2025, Номер 155(2)

Опубликована: Янв. 2, 2025

Язык: Английский

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Differences in triglycerides, methyl, and ethyl esters hydrodeoxygenation over Ni-phosphide catalysts

Reaction Kinetics Mechanisms and Catalysis, Год журнала: 2024, Номер 137(2), С. 935 - 949

Опубликована: Фев. 9, 2024

Язык: Английский

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Boosting bio-lipids hydrodeoxygenation via highly dispersed and coking-resistance bimetallic Ni-La/SiO2 catalyst

Journal of environmental chemical engineering, Год журнала: 2024, Номер unknown, С. 114968 - 114968

Опубликована: Ноя. 1, 2024

Язык: Английский

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Repulsive Lateral Interaction of Water Molecules at the Initial Stages of Adsorption in Microporous AlPO₄-11 According to ²⁷Al NMR and DFT

Langmuir, Год журнала: 2024, Номер 40(12), С. 6384 - 6393

Опубликована: Март 13, 2024

Lateral (adsorbate–adsorbate) interactions between adsorbed molecules affect various physical and chemical properties of microporous adsorbents catalysts, influencing their functional properties. In this work, we studied the hydration AlPO4-11 aluminophosphate, which has an unusually ordered structure upon adsorption water vapor, according to 27Al NMR data, only tetrahedrally or octahedrally coordinated Al sites are present in AlPO4-11. These data consistent with results density theory (DFT) calculations hydrated AlPO4-11, revealed presence a strong repulsive lateral interaction at initial stage adsorption, suppressing on neighboring (separated by one −O–P–O– bridge) crystallographic sites. As result, all different aluminum sites, half Al1 adsorb two acquire octahedral coordination.

Язык: Английский

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Differences in Triglycerides, Methyl, and Ethyl Esters HDO over Ni-Phosphide Catalysts

Опубликована: Дек. 6, 2023

Fatty acid methyl and ethyl esters (FAMEs FAEEs) are usually used as model compounds of vegetable oils or fats (triglycerides – TGs) in hydrodeoxygenation (HDO) processes. It is often suggested that the rate, selectivity, yield hydrocarbons FAME HDO similar to TG HDO. On other hand, conversion always higher. In this paper we analyze differences (methyl palmitate, octanoate), FAEE (ethyl laurate), (tricaprylin) These attributed chemical nature FAME, FAEE, TG, different reaction rates initial compounds. The experiments were carried out continuous flow fixed bed reactor at 250–330 °C 3 MPa. Ni2P supported on SiO2, SBA-15, Al2O3 catalysts. O removal for same catalyst with high acidity (Ni2P/Al2O3), but low (Ni2P/SiO2). turned rate fatty significantly higher conditions compared esters. Thus, it was concluded rapidly transforms there almost no influence i.e., synergetic effect metal sites can be obtained

Язык: Английский

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Ni phosphide catalysts on Al₂O₃‐zeolite prepared by phosphidation for methyl palmitate hydroconversion

Journal of Chemical Technology & Biotechnology, Год журнала: 2024, Номер unknown

Опубликована: Окт. 10, 2024

Abstract BACKGROUND One‐stage hydroconversion of fatty‐acid based feedstocks is a promising way to obtain high‐quality fuels. This process on hydrodeoxygenation, isomerization and hydrocracking reactions. In this work, Ni 2 P/Al O 3 ‐zeolite catalysts were synthesized tested in model compound – methyl palmitate. RESULTS P prepared by situ phosphidation metallic Ni/Al precursors PPh . Mixtures zeolite (30 wt%) boehmite peptized extruded the support granules. SAPO‐11, ZSM‐5, ZSM‐22, ZSM‐23 ZSM‐12 used as component. The supports characterized range physicochemical methods: chemical analysis (ICP‐AES), low‐temperature N adsorption, H ‐temperature programmed reduction, NH desorption, Fourier transform infrared spectroscopy adsorbed CO, X‐ray diffraction, transmission electron microscopy, photoelectron spectroscopy, 27 Al 31 magic angle spinning nuclear magnetic resonance. studied palmitate (one‐stage hydrodeoxygenation‐isomerization‐hydrocracking) continuous‐flow fixed bed reactor at 290–340 °C, MPa, /feed = 600 Ncm /cm LHSV 5.3 h −1 SAPO‐11 containing sample showed high selectivity C15 C16 iso‐alkanes (63%, 340 °C), all ZSM‐containing samples cracked C5–C9 products (55–100%, °C) with varying amounts (31–57%, °C). CONCLUSION results show that choosing component catalyst it possible finely tune product quality from diesel fuel jet or gasoline. © 2024 Society Chemical Industry (SCI).

Язык: Английский

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Ni2P/Al2O3-SAPO-11 Catalysts for Hydroprocessing of Methyl Palmitate: a Comparative Investigation of Synthesis Methods

Petroleum Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 14, 2024

Язык: Английский

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