Iron-catalyzed fast hydrothermal liquefaction of Cladophora socialis macroalgae into high quality fuel precursor

Nguyen, Son Tang; Le, Tu Manh; Nguyen, Hieu V.

doi:10.1016/j.biortech.2021.125445

Cited by 27 publications

(10 citation statements)

References 44 publications

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“…Due to the high yield of LO and HO under the catalysis of 60Fe-40Co/Al 2 O 3 , the maximum total energy-recovery ratio was 93.52%. Compared with the results of 79.5% (Fe catalyzed), 55.4% (HZSM-5) and 54.9% (Ru/C) reported in other studies [19], it was much higher in the present study.…”

Section: Hhv and Energy Recoverycontrasting

confidence: 91%

“…Fe and Co metals can increase the acidity and strength of the catalyst, thereby significantly improving the catalytic efficiency. In the catalysis process, Fe plays a variety of roles: (i) improving the liquefaction ratio and obtaining more bio-oil precursor substances; (ii) in situ hydrogen production and promoting hydrodeoxygenation of bio-oil [19]. At present, more and more researchers are paying attention to the efficient catalytic degradation of biomass and the preparation of bio-oil.…”

Section: Introductionmentioning

confidence: 99%

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Ethanol-Assisted Hydrothermal Liquefaction of Poplar Using Fe-Co/Al2O3 as Catalyst

Shakeel

Zhang

et al. 2022

Energies

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Although the conversion of lignocellulosic biomass into bio-oil with high yield/quality through hydrothermal liquefaction (HTL) is promising, it still faces many challenges. In this study, a Fex-Co(1-x)/Al2O3 catalyst was prepared with the coprecipitation method and low-content ethanol was used as the cosolvent for the HTL of poplar. The results showed that the Fex-Co(1-x)/Al2O3 catalyst significantly promoted the yield and energy recovery rate (ERR) of bio-oil compared with the control (10% ethanol content). At 260 °C for 30 min, 60Fe-40Co/Al2O3 had the best catalytic effect, achieving the highest bio-oil yield (67.35%) and ERR (93.07%). As a multifunctional bimetallic catalyst, Fex-Co(1-x)/Al2O3 could not only increase the degree of hydrogenation deoxidization of the product but also promote the diversity of phenolic compounds gained from lignin. The bio-oil obtained from HTL with Fex-Co(1-x)/Al2O3 as catalyst contained lower heterocyclic nitrogen, promoting the transfer of more bio-oil components to substances with lower boiling point.

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Section: Hhv and Energy Recoverycontrasting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Ethanol-Assisted Hydrothermal Liquefaction of Poplar Using Fe-Co/Al2O3 as Catalyst

Shakeel

Zhang

et al. 2022

Energies

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“…58,59 More work is required for understanding the kinetics and mechanisms of N removal from algal bio-oil. Nguyen et al 60 applied a variety of homogeneous and heterogeneous catalysts for HTL of deashed Cladophora socialis to produce bio-oil with low N content at 350 °C for 8 min, with 7.1 wt % of algae loading and 10 wt % of catalyst loading based on algae. N content in the bio-oil dropped from 34% (noncatalytic HTL run) to 28% (catalytic HTL using a metallic Fe catalyst).…”

Section: Biofuels From Algaementioning

confidence: 99%

Recent Advances in Algae-Derived Biofuels and Bioactive Compounds

Feng

Kang

Salaudeen

et al. 2022

Ind. Eng. Chem. Res.

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Owing to the declining reserve of fossil resources as well as more concerns on climate change, and essential energy security, and especially the broad consensus on carbon neutralization, it is significantly critical to develop renewable and sustainable energy and chemicals. Algae as alternative resources can be applied to produce biofuels and biochemicals. Among them, algae-derived natural pigments exhibit high market value due to their uses in pharmaceutical and food industries. As a result of the developments of engineering tools, it is feasible to scale up algal processing and applications. Prior to the industrial implementation, life cycle assessment is required to ensure the environmental feasibility of algae-based biofuels and biochemicals. In this article, recent advances in processing algae for liquid, gas, and solid fuels are reviewed. New approaches for enhancing the natural pigment accumulation are also discussed. Recent studies on life cycle assessment of algae-based biofuels and biochemicals, as well as the main challenges faced by the algal biorefinery, are discussed in this manuscript.

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“…Vietnamese researchers processed Cladophora sociali macroalgae in the presence of homogeneous (KOH, K 2 CO 3 , H 3 PO 4 , HCOOH) and heterogeneous (zeolite, Ni-Re, Ru/C, Fe) catalysts at 350 • C. The maximum yield (36.2%) and the minimum content of heteroatoms were achieved using metallic iron as a catalyst [72].…”

Section: Using Macroalgae For Biofuel Production In a One-step Processmentioning

confidence: 99%

“…The use of alkalis only provides a decrease in the likelihood of repolymerization of products, which ensures a decrease in the yield of biochar and an increase of liquid fuel yield. Acid catalysis, as a rule, leads to negative consequences, increasing the rate of repolymerization of molecules in solution, reducing the yield of biofuel, and increasing the yield of the solid fraction [31,69,72].…”

Section: Using Macroalgae For Biofuel Production In a One-step Processmentioning

confidence: 99%

Review of Studies on Joint Recovery of Macroalgae and Marine Debris by Hydrothermal Liquefaction

et al. 2022

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At the moment, macroalgae blooms in sea waters, the rotting of which causes greenhouse gas emissions and contributes to the formation of a negative ecological and economic situation in coastal zones, which has become a serious problem. Fuel production through hydrothermal liquefaction (HTL) of macroalgae and marine debris is a promising solution to this ecological problem. The article provides an overview of studies on producing fuel from macroalgae and an assessment of the possibility of their joint recovery with marine debris. The optimal process conditions and their technological efficiency were evaluated. The article shows the feasibility of using heterogeneous catalysis and co-solvent to increase the yield of bio-oil and improve its quality. An assessment of the possibility of joint processing of waste macroalgae and marine debris showed the inexpediency of this direction. The high degree of drift macroalgae contamination also raises the question of the appropriateness of the preliminary extraction of other valuable components for nutrition use, such as fats, proteins, carbohydrates, and their derivatives.

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Iron-catalyzed fast hydrothermal liquefaction of Cladophora socialis macroalgae into high quality fuel precursor

Cited by 27 publications

References 44 publications

Ethanol-Assisted Hydrothermal Liquefaction of Poplar Using Fe-Co/Al2O3 as Catalyst

Ethanol-Assisted Hydrothermal Liquefaction of Poplar Using Fe-Co/Al2O3 as Catalyst

Recent Advances in Algae-Derived Biofuels and Bioactive Compounds

Review of Studies on Joint Recovery of Macroalgae and Marine Debris by Hydrothermal Liquefaction

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