Supercritical water gasification (SCWG) as a potential tool for the valorization of phycoremediation-derived waste algal biomass for biofuel generation

Leong, Yoong Kit; Chen, Wei‐Hsin; Lee, Dong Hoon; Chang, Jo‐Shu

doi:10.1016/j.jhazmat.2021.126278

Cited by 44 publications

(8 citation statements)

References 107 publications

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“…The biomass concentration in the feed is another critical parameter that significantly impacts the composition of the product gases (CH 4 , CO 2 , and H 2 ). The research on SCWG of biomass claims that the high biomass concentration decreases the yield of product gases . The effect of the feedstock concentration was studied by changing the amount of BPS with Ni-EPW in a weight ratio of 1:4 to 1:10 at 600 °C for 60 min.…”

Section: Resultsmentioning

confidence: 99%

“…The research on SCWG of biomass claims that the high biomass concentration decreases the yield of product gases. 38 The effect of the feedstock concentration was studied by changing the amount of BPS with Ni-EPW in a weight ratio of 1:4 to 1:10 at 600 °C for 60 min. Figure 3 shows that the H 2 and TGY obtained for a BPS-to-Ni-EPW ratio (BTW) of 1:4 were 2.4 ± 0.07 mmol•g −1 and 7.40 ± 0.22 mmol•g −1 , respectively.…”

Section: Tga and Dtg Analysismentioning

confidence: 99%

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In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem

Kumar

Reddy

2023

Ind. Eng. Chem. Res.

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This study successfully utilized the banana pseudostem (BPS) to remove heavy metals (HMs) from nickel electroplating wastewater (Ni-EPW) while generating H 2 -rich gaseous fuel and synthesizing a valuable nanometal carbon matrix (NCM). This study highlights the synergetic effect of HMs promoting the decomposition of lignocellulosic biomass into H 2 -rich gaseous fuel, with simultaneous recovery of HMs from the metal effluent in the form of NCM and reduction of formed metal oxide to lower valence metal oxides or metals with an increase in the temperature (300−600 °C). This study also examined how the crucial parameters, like temperature, time, and biomass-to-Ni-EPW ratio, impact the process performance. The maximum H 2 yield (6.8 ± 0.20 mmol•g −1 ), total gas yield (TGY) (17.3 ± 0.51 mmol•g −1 ), and carbon gasification efficiency (CGE) (36%) were determined at 600 °C and a biomass-to-Ni-EPW ratio of 1:10 for a retention time of 60 min. The use of nickel electroplating wastewater with the banana pseudostem catalyzes the degradation of biomass reaction rate and water gas shift reaction. It improves the TGY, H 2 gas yield, and CGE to 2.2, 1.7, and 2.6 times, respectively, compared with Millipore water (without any metal). The NCM obtained at 600 °C has quasi-spherical morphology with a larger surface area of 146.2 m 2 •g −1 and exhibits magnetic saturation (M s ) of ∼3.42 emu•g −1 , which also finds its application in the fabrication of sensors and supercapacitors.

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Section: Resultsmentioning

confidence: 99%

Section: Tga and Dtg Analysismentioning

confidence: 99%

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem

Kumar

Reddy

2023

Ind. Eng. Chem. Res.

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“…As for the "wet" processes, when biomass is gasified in supercritical water (SCW), H 2 -rich syngas is the target product, while the water phase product and solid char are the side products. 79 The water phase can be used as algae cultivation medium, 80 and the solid char can be further used as activated carbon after physical or chemical activation. Jiao et al 81 studied SCWG of algae over Pt/C or Ru/C.…”

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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“…Compared with conventional methods, solvents exhibit many unique properties under supercritical conditions, such as low viscosity, high dispersion, strong solvent solubility, and high thermal conductivity. In the field of biomass catalytic conversion, the pyrolysis and liquefaction of cellulose, lignin, and various biomass resources by utilizing the solubility and generated free radicals of supercritical fluids to obtain high-value-added products has always been a research hotspot ( Onwudili and Williams, 2013 ; Yakaboylu et al, 2015 ; Casademont et al, 2018 ; Li et al, 2019 ; Bartolomei et al, 2021 ; Leong et al, 2021 ; Perez et al, 2022 ). As a special biomass resource, tobacco is mainly composed of aromatic substances and aroma precursors wrapped in cell walls composed of hemicellulose, cellulose, lignin, pectin, etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation of tobacco pyrolysis liquids in subcritical/supercritical ethanol and their application in the aroma enhancement of heated cigarettes

Zhao,

et al. 2024

Front. Chem.

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For the aroma enhancement research of heated cigarettes, it is worth exploring whether tobacco can be pyrolyzed into pyrolysis liquids containing a large number of volatile aroma components. In this study, tobacco pyrolysis liquids were prepared in subcritical/supercritical ethanol, and their applications in the aroma enhancement of heated cigarettes were investigated. The optimal conditions of supercritical liquefaction reactions were determined by optimizing the reaction time, liquid/solid mass ratio and temperature conditions. Moreover, the effect of supercritical liquefaction conditions on volatile aroma components in tobacco pyrolysis liquids was investigated by GC-MS. The results indicated that the reaction temperature had the most significant impact on the tobacco pyrolysis reaction, and higher reaction temperature promoted the pyrolysis conversion of tobacco, resulting in enhanced tobacco conversion and a high content of volatile components in the tobacco pyrolysis liquid. The optimal reaction conditions for the preparation of tobacco pyrolysis liquid were found to be a temperature of 220°C, a liquid/solid mass ratio = 15, and a 2-h reaction time. Meanwhile, the content of ester compounds and nicotine in the tobacco pyrolysis liquid increased significantly with the increase of reaction temperature. Sub/supercritical ethanol treatment significantly destroyed the surface structure of tobacco, and the degree of tobacco depolymerization increased when temperature rised. The analysis of aroma compounds in the smoke of heated cigarettes indicated that the tobacco pyrolysis liquid could significantly increase the release of aromatic substances and has a significant aroma-enhancing effect. This article proposed and prepared tobacco pyrolysis liquid in subcritical/supercritical ethanol and explored its potential application in the aroma enhancement of heated cigarettes, offering a new route for flavor enhancement technology for this type of product.

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Supercritical water gasification (SCWG) as a potential tool for the valorization of phycoremediation-derived waste algal biomass for biofuel generation

Cited by 44 publications

References 107 publications

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem

Recent Advances in Algae-Derived Biofuels and Bioactive Compounds

Preparation of tobacco pyrolysis liquids in subcritical/supercritical ethanol and their application in the aroma enhancement of heated cigarettes

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Supercritical water gasification (SCWG) as a potential tool for the valorization of phycoremediation-derived waste algal biomass for biofuel generation

Cited by 44 publications

References 107 publications

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H2 Using Banana Pseudostem

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H2 Using Banana Pseudostem

Recent Advances in Algae-Derived Biofuels and Bioactive Compounds

Preparation of tobacco pyrolysis liquids in subcritical/supercritical ethanol and their application in the aroma enhancement of heated cigarettes

Contact Info

Product

Resources

About

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem

In Situ Encapsulation of Nanometals in Carbon Matrix from Hazardous Wastewater with Cogeneration of H₂ Using Banana Pseudostem