Fe-Assisted Hydrothermal Liquefaction of Lignocellulosic Biomass for Producing High-Grade Bio-Oil

Miyata, Yoshinori; Sagata, Kunimasa; Hirose, Mina; Yamazaki, Yoshiko; Nishimura, Aki; Okuda, Norimasa; Arita, Yoshitaka; Hirano, Yoshiaki; Kita, Yasuhiro

doi:10.1021/acssuschemeng.7b00381

Cited by 53 publications

(32 citation statements)

References 34 publications

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“…Two feasible methods for the valorization of lignocellulosic biomass for bioenergy applications are: (1) fermentation of sugars from cellulose and hemicellulose components to biofuel [21] or (2) hydrothermal liquefaction and gasification to produce bio-oil [93,94,95] and biogas [96,97] (Figure 1 and Figure 3). In all these methods, pretreatment and solvation are critical steps, and it is important to find green solvents that can substitute the previously used hazardous solvents.…”

Section: Introductionmentioning

confidence: 99%

Deep Eutectic Solvents for Pretreatment, Extraction, and Catalysis of Biomass and Food Waste

2019

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Valorization of lignocellulosic biomass and food residues to obtain valuable chemicals is essential to the establishment of a sustainable and biobased economy in the modern world. The latest and greenest generation of ionic liquids (ILs) are deep eutectic solvents (DESs) and natural deep eutectic solvents (NADESs); these have shown great promise for various applications and have attracted considerable attention from researchers who seek versatile solvents with pretreatment, extraction, and catalysis capabilities in biomass- and biowaste-to-bioenergy conversion processes. The present work aimed to review the use of DESs and NADESs in the valorization of biomass and biowaste as pretreatment or extraction solvents or catalysis agents.

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Section: Introductionmentioning

confidence: 99%

Deep Eutectic Solvents for Pretreatment, Extraction, and Catalysis of Biomass and Food Waste

2019

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“…On the basis of reaction routes investigated herein and our previous work, 13,16 we propose the overall reaction pathway shown in…”

Section: Proposed Overall Reaction Pathwaymentioning

confidence: 79%

“…In our previous work, we confirmed that pyruvaldehyde could be hydrogenated under hydrothermal condition in the presence of Fe to produce hydroxyacetone. 13 According to the literature, [29][30][31] there are a few possible hydrogenation pathways using zero-valent metal in water (Scheme 1). Pathway (i)…”

Section: Hydrogenation By Metallic Fementioning

confidence: 99%

“…Oil palm empty fruit bunch (EFB) was efficiently liquefied to afford an especially large amount of WS fraction. 13 We focused on the WS fraction because it is a promising source of renewable chemical feedstocks; its aggressive utilization by catalytic cracking using a solid acid catalyst (HZSM-5 zeolite) produces hydrocarbons, such as olefinic and aromatic compounds. 14 The WS fraction produced through Fe-assisted HTL exhibited higher hydrocarbon yields than conventional HTL.…”

Section: Introductionmentioning

confidence: 99%

“…3 On the basis of the reactivity of saccharides and a few possible intermediates in Fe-assisted HTL, we hypothesized that step (ii) is accelerated, while step (iii) is suppressed in the Fe/H 2 O system. 13 However, our previous study was limited to the effect of Fe on the reactivity of carbohydrate substrates and their decomposition products. The effect on lignin reactivity was not evaluated and the detailed role of Fe in the hydrothermal system remains unclear.…”

Section: Introductionmentioning

confidence: 99%

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Mechanism of the Fe-Assisted Hydrothermal Liquefaction of Lignocellulosic Biomass

Miyata

Sagata

Yamazaki

et al. 2018

Ind. Eng. Chem. Res.

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Hydrothermal liquefaction (HTL) is a promising technique for converting biomass feedstocks to fuel and fine chemicals. A metallic Fe additive increases the water-soluble (WS) products of HTL, although the mechanism is unclear. Herein, commercially available carbohydrates (poly-and monosaccharides) and lignin isolated by enzymatic saccharification of palm empty fruit bunch were used as model substrates in the evaluation of the effect of Fe on HTL product composition. For carbohydrates, Fe and oxidized Fe synergistically contributed to the production of light compounds in the WS fraction by accelerating the retro-aldol condensation of sugars and suppressing the recondensation of unstable intermediates. The reactive intermediates could be stabilized by an electron-transfer-type reduction. On the other hand, Fe showed minimal effect on the HTL of enzymatic lignin, which was mainly converted to water-insoluble products. The results for the model substrates provided a picture of the overall pathway of Fe-assisted HTL of biomass.

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Liquid Organic Hydrogen Carriers (LOHCs) as H‐Source for Bio‐Derived Fuels and Additives Production

Valentini

Marrocchi

Vaccaro

2022

Advanced Energy Materials

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consumption combined with a resource efficient circular economy approach, with the final goal of minimizing the impact of health, safety, security and environment.In the design of a greener future, the replacement of depleting sources with renewable ones is at the center of a sustainable development. [2] Biomass is a natural, abundant, renewable, carbon-neutral source; its use represents a promising strategy to address the need for substituting fossil feedstock in the preparation of chemicals, fuels, and materials, besides energy production. [3][4][5][6][7][8][9][10][11][12][13][14] The major issues that limit the large-scale utilization of biomass in fuel production are the differences in cost and process efficiencies compared to those for fossil fuels. [15] After the Covid-19 crisis, this aspect has become even more evident, as reported by the International Agency of Energy, ultimately causing the first contraction in biofuel production over the past two decades. [16] The reduced transport fuel demand and the decreased petroleum-based fuel prices have transitorily lowered the economic interest for biofuel production. In this pandemic and emergency scenario, therefore, has emerged even more clearly the importance of developing efficient strategies for biomass conversion into fuels, making economically attractive the use of environmentally friendly renewable energy systems (Figure 1). [17] Among the plethora of biomass transformations, hydrogenation and hydrodeoxygenation reactions are widely used for decreasing the oxygen content of biomass-derived platforms to increase their potential as fuels. [18][19][20] In this context, as well as in the challenging goal of creating a decarbonized energy system, hydrogen plays a prominent role in the chemical industry. [21][22][23][24] It is important to notice that the vast majority of the worldwide hydrogen production (45-65 Mt/year) features a significant CO 2 footprint as a consequence of different hydrocarbon reforming processes (i.e., steam-reforming of fossil fuels, thermal cracking of natural gas, solar-thermal reforming of methane) or of coal gasification. [25] Several efforts have been directed during the past years toward the definition of possible effective approaches to a green H 2 production by water splitting. [26][27][28][29][30][31] To date, however, both water electrolysis and photo-driven water splitting are economically and energetically unfavorable, with a long way ahead to hold the promise of a zero-carbon energy system. Indeed, the associated energy demand as well as the low market prices of oxygen, inevitably co-produced from water electrolysis, hinder the shaping of a large-scale employment of this technology.Liquid organic hydrogen carriers (LOHCs) are attractive materials for their ability to generate in situ hydrogen that may be directly used to produce target biofuel precursors, fuels or fuel additives. Indeed, the replacement of fossil feedstock is an urgent necessity for shifting toward a carbon neutral energy economy. Several desired chemica...

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Fe-Assisted Hydrothermal Liquefaction of Lignocellulosic Biomass for Producing High-Grade Bio-Oil

Cited by 53 publications

References 34 publications

Deep Eutectic Solvents for Pretreatment, Extraction, and Catalysis of Biomass and Food Waste

Deep Eutectic Solvents for Pretreatment, Extraction, and Catalysis of Biomass and Food Waste

Mechanism of the Fe-Assisted Hydrothermal Liquefaction of Lignocellulosic Biomass

Liquid Organic Hydrogen Carriers (LOHCs) as H‐Source for Bio‐Derived Fuels and Additives Production

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