Microwave-assisted biorefineries

Опубликована: Фев. 24, 2025

Язык: Английский

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Subcritical water extraction of bioactive phenolic compounds from distillery stillage

Journal of Environmental Management, Год журнала: 2022, Номер 318, С. 115548 - 115548

Опубликована: Июнь 24, 2022

Язык: Английский

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Microwave–assisted hydrothermal conversion of crop straw: Enhancing the properties of liquid product and hydrochar by varying temperature and medium

Energy Conversion and Management, Год журнала: 2023, Номер 290, С. 117192 - 117192

Опубликована: Май 31, 2023

Язык: Английский

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Antimicrobial and antioxidant activities of lignin by-product from sugarcane leaf conversion to levulinic acid and hydrochar

Sustainable materials and technologies, Год журнала: 2024, Номер 40, С. e00973 - e00973

Опубликована: Май 12, 2024

Язык: Английский

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Energy recovery from agro-forest wastes through hydrothermal carbonization coupled with hydrothermal co-gasification: Effects of succinic acid on hydrochars and H2 production

Chemosphere, Год журнала: 2023, Номер 337, С. 139390 - 139390

Опубликована: Июль 2, 2023

Язык: Английский

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Changes in Selected Organic and Inorganic Compounds in the Hydrothermal Carbonization Process Liquid While in Storage

ACS Omega, Год журнала: 2023, Номер 8(4), С. 4234 - 4243

Опубликована: Янв. 19, 2023

Although many studies have investigated the hydrothermal transformation of feedstock biomass, little is known about stability compounds present in process liquid after carbonization completed. The physicochemical characteristics (HTC) products may change over storage time, diminishing amount desired or producing unwanted contaminants. These changes restrict use HTC products. Here, we investigate effect temperature (20, 4, and -18 °C) time (weeks 1-12) on structural compositional selected organic from digested cow manure. ANOVA showed that has a significant concentrations almost all compounds, except acetic acid. Considerable composition took place at studied temperatures, including deep freezing °C. Prominent polymerization aromatic with formation precipitates, which settle time. This, turn, influences inorganic phase by chelating selectively adsorbing them. implications these results further processing for various applications are discussed.

Язык: Английский

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Levulinic Acid Is a Key Strategic Chemical from Biomass

Catalysts, Год журнала: 2022, Номер 12(8), С. 909 - 909

Опубликована: Авг. 18, 2022

Levulinic acid (LA) is one of the top twelve chemicals listed by US Department Energy that can be derived from biomass. It serves as a building block and platform chemical for producing variety chemicals, fuels materials which are currently produced in fossil based refineries. LA key strategic chemical, fuel grade plastic substitutes its catalytic conversion. derivatisation to various product streams, such alkyl levulinates via esterification, γ-valerolactone hydrogenation N-substituted pyrrolidones reductive amination many other transformations commercial utility possible owing two oxygen functionalities, namely, carbonyl carboxyl groups, present within same substrate. Various biomass feedstock, agricultural wastes, marine macroalgae, fresh water microalgae were successfully converted high yields. Finding substitute mineral catalysts conversion challenge. The use an ultrasound technique facilitated production promising nano-solid including Ga salt molybophosphoric deposited mordenite zeolite, with optimum amounts Lewis Bronsted acidities needed glucose yields, being 56 59.9 wt.% respectively. Microwave irradiation technology was utilized accelerated (53 wt.%) short duration 6 min, making unique synergistic activity ZnBr2 HCl.

Язык: Английский

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Conversion of the hydrochar recovered after levulinic acid production into activated carbon adsorbents

Waste Management, Год журнала: 2023, Номер 168, С. 235 - 245

Опубликована: Июнь 13, 2023

Levulinic acid production by acid-catalyzed hydrothermal conversion of (ligno)cellulosic biomass generates significant amounts carbonaceous hydrochar, which is currently considered a final waste. In this work, the hydrochar recovered after levulinic production, was subjected to cascade pyrolysis and chemical activation treatments (by H3PO4 or KOH), synthesize activated carbons. The post-treatment already effective in improving surface properties raw (Specific Surface Area: 388 m2/g, VP: 0.22 cm3/g, VMESO: 0.07 VMICRO: 0.14 cm3/g), removing volatile compounds. KOH resulted as most appropriate for further pyrolyzed showing best 1421 0.63 0.10 0.52 synergistically makes it promising system towards adsorption CO2 (∼90 mg/g) methylene blue (∼248 mg/g). addition, can be achieved direct hazelnut shells, preferably 1918 1.34 0.82 0.50 but choice not smartest, does allow valorization cellulose fraction acid. Our approach paves way possible uses these hydrochars originating from chain new environmental applications, thus smartly closing biorefinery loop shells.

Язык: Английский

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Predictive Models for the Hydrothermal Liquefaction Products of Brown Macroalgae

Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

This study presents novel predictive models for hydrothermal liquefaction (HTL) of brown macroalgae describing the formation biocrude, gas, biochar, and water-soluble compounds as products. The account chemical composition explain effects time, temperature, pressure, water-to-biomass ratio input variables to estimate product yields from HTL. To achieve this goal, we used experimental kinetic data develop a process simulation batch HTL macroalgae. We then applied design experiment generate runs at different combinations variables. results were such conditions on Next, generated optimize yield biocrude produced. Also, response surface methodology visualize effect yields. Additionally, validated against literature, with 91% agreement within 95% prediction interval model. Analysis variance showed that selection operational parameters significantly affects yield. optimal was 23% 283 °C, 200 bar, 54 min, 10:1, temperature residence time significant affect Sensitivity analysis reaction rate constants allowed identification paths workflow presented in provide an accurate path modeling various products kelp.

Язык: Английский

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HYDROTHERMAL CARBONIZATION – A CRITICAL OVERVIEW OF ITS ENVIRONMENTAL AND ECONOMIC SUSTAINABILITY

Journal of Cleaner Production, Год журнала: 2025, Номер unknown, С. 144838 - 144838

Опубликована: Янв. 1, 2025

Язык: Английский

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