Molecular characterization of the thermally labile fraction of biochar by hydropyrolysis and pyrolysis-GC/MS

Rombolà, Alessandro G.; Fabbri, Daniele; Meredith, Will; Snape, Colin E.; Dieguez-Alonso, Alba

doi:10.1016/j.jaap.2016.08.003

Cited by 38 publications

(28 citation statements)

References 65 publications

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“…As it has been introduced in Section 2, corn digestate contains calcium carbonates, mainly due to storing conditions. The inorganic C content of CD biochars, due to carbonates, is approximately 4-5%, as determined by Rombolà et al [52]. The presence of these carbonates could explain, to some extent, the higher volatiles content of CD biochars in comparison with PW biochars, since at the conversion temperatures used in this study (400 and 600 • C) carbonates are stable and therefore remain in the biochar.…”

Section: Primary Characterization: Yields Elemental and Proximate Ansupporting

confidence: 74%

Towards Biochar and Hydrochar Engineering—Influence of Process Conditions on Surface Physical and Chemical Properties, Thermal Stability, Nutrient Availability, Toxicity and Wettability

et al. 2018

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The impact of conversion process parameters in pyrolysis (maximum temperature, inert gas flow rate) and hydrothermal carbonization (maximum temperature, residence time and post-washing) on biochar and hydrochar properties is investigated. Pine wood (PW) and corn digestate (CD), with low and high inorganic species content respectively, are used as feedstock. CD biochars show lower H/C ratios, thermal recalcitrance and total specific surface area than PW biochars, but higher mesoporosity. CD and PW biochars present higher naphthalene and phenanthrene contents, respectively, which may indicate different reaction pathways. High temperatures (>500 • C) lead to lower PAH (polycyclic aromatic hydrocarbons) content (<12 mg/kg) and higher specific surface area. With increasing process severity the biochars carbon content is also enhanced, as well as the thermal stability. High inert gas flow rates increase the microporosity and wettability of biochars. In hydrochars the high inorganic content favor decarboxylation over dehydration reactions. Hydrochars show mainly mesoporosity, with a higher pore volume but generally lower specific surface area than biochars. Biochars present negligible availability of NO − 3 and NH + 4 , irrespective of the nitrogen content of the feedstock. For hydrochars, a potential increase in availability of NO − 3 , NH + 4 , PO 3− 4 , and K + with respect to the feedstock is possible. The results from this work can be applied to "engineer" appropriate biochars with respect to soil demands and certification requirements.

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Section: Primary Characterization: Yields Elemental and Proximate Ansupporting

confidence: 74%

Towards Biochar and Hydrochar Engineering—Influence of Process Conditions on Surface Physical and Chemical Properties, Thermal Stability, Nutrient Availability, Toxicity and Wettability

et al. 2018

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“…The presence in biochar of bioavailable organic components like hydrophilic compounds and thermally labile fractions ( Rombolà et al, 2016 ), adsorbed volatile organic compounds ( Spokas et al, 2011 ), and polycyclic aromatic hydrocarbons ( Buss et al, 2015 ) is well established. Many inorganic compounds including essential elements for the improvement of fungal laccase production such as Cu, Mn, or Fe have also been found in the biochar structure (see below).…”

Section: Carbonaceous Materials In Laccase Production and As A Support For Their Immobilizationmentioning

confidence: 99%

Recent Developments in the Immobilization of Laccase on Carbonaceous Supports for Environmental Applications - A Critical Review

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Lonappan

Alokpa

et al. 2021

Front. Bioeng. Biotechnol.

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Τhe ligninolytic enzyme laccase has proved its potential for environmental applications. However, there is no documented industrial application of free laccase due to low stability, poor reusability, and high costs. Immobilization has been considered as a powerful technique to enhance laccase’s industrial potential. In this technology, appropriate support selection for laccase immobilization is a crucial step since the support could broadly affect the properties of the resulting catalyst system. Through the last decades, a large variety of inorganic, organic, and composite materials have been used in laccase immobilization. Among them, carbon-based materials have been explored as a support candidate for immobilization, due to their properties such as high porosity, high surface area, the existence of functional groups, and their highly aromatic structure. Carbon-based materials have also been used in culture media as supports, sources of nutrients, and inducers, for laccase production. This study aims to review the recent trends in laccase production, immobilization techniques, and essential support properties for enzyme immobilization. More specifically, this review analyzes and presents the significant benefits of carbon-based materials for their key role in laccase production and immobilization.

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“…X-ray fluorescence (XRF) spectroscopy has been explored for elements quantification (Abdel-Fattah et al, 2015;Jones et al, 2015). Pyrolysis coupled to gas chromatography and mass spectrometry (Py-GC/MS) is a suitable technique to study the organic molecules characterizing the composition of biochar (Kaal et al, 2012;Rombolà et al, 2016). In addition to these techniques, thermogravimetric (TG) and derivative thermo-gravimetric (DTG) analyses can be utilized to understand the changes in the physical and chemical properties of materials occurring during heating (Liu et al, 2014;Missaoui et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Multianalytical characterization of biochar and hydrochar produced from waste biomasses for environmental and agricultural applications

et al. 2019

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Molecular characterization of the thermally labile fraction of biochar by hydropyrolysis and pyrolysis-GC/MS

Cited by 38 publications

References 65 publications

Towards Biochar and Hydrochar Engineering—Influence of Process Conditions on Surface Physical and Chemical Properties, Thermal Stability, Nutrient Availability, Toxicity and Wettability

Towards Biochar and Hydrochar Engineering—Influence of Process Conditions on Surface Physical and Chemical Properties, Thermal Stability, Nutrient Availability, Toxicity and Wettability

Recent Developments in the Immobilization of Laccase on Carbonaceous Supports for Environmental Applications - A Critical Review

Multianalytical characterization of biochar and hydrochar produced from waste biomasses for environmental and agricultural applications

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