Thermodynamic Properties of Plant Biomass Components. Heat Capacity, Combustion Energy, and Gasification Equilibria of Lignin

Voitkevich, Olga V.; Kabo, Gennady J.; Blokhin, Andrey V.; Paulechka, Yauheni U.; Shishonok, M. V.

doi:10.1021/je2012814

Cited by 45 publications

(33 citation statements)

References 7 publications

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“…4 can be applied to determine the degree of reduction of SOM, γ C , also shown in Table 1. All L/F samples have γ C values close to those of carbohydrates (γ C = 4) and tend to increase from the top soil layer to the mineral samples where values show SOM more reduced than carbohydrates, approaching to values reported for lignocellulosic material and lignin in some of the H and M samples (Gary et al 1995, Voitkevich et al 2012). Therefore, the degree of reduction of SOM in the mineral soils is higher than those in the surface organic layers with little variability among sampling sites for the L/F layer, and more spatial variability in the H and M soils.…”

Section: Resultsmentioning

confidence: 65%

“…Δ C H SOM has been rarely used as a SOM property due to technological reasons, but new DSC devices can measure simultaneously the energy and mass losses, improving accuracy and yielding Q SOM values close to the heat of combustion of organic material reported by the literature (Gary et al 1995, Villanueva et al 2011, Voitkevich et al 2012 and to values from mineral soils reported recently (Barré et al 2016, Barros et al 2016, Barros 2018. Calculation of Δ C H SOM yields the possibility to quantify SOM recalcitrance by the degree of reduction, γ C .…”

Section: Discussionmentioning

confidence: 92%

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Thermodynamics of soil organic matter decomposition in semi‐natural oak (Quercus) woodland in southwest Ireland

Barros

Fernández

Byrne

et al. 2020

Oikos

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The evolution of soil terrestrial ecosystems is a subject with difficulties to define their maturity and evolutionary state. In the last century, thermodynamics was one of the options considered by ecologists for that goal. Difficulties in quantifying the thermodynamic parameters needed by the evolutionary theories caused that this subject has been practically locked since the end of the last century. Application of thermodynamics needs reactions and one of the main reactions in soil ecosystems are those involved in the decomposition of the soil organic matter. This paper aims to provide an initial step to study those reactions from a thermodynamic perspective. With that goal in mind, thermal analysis and isothermal calorespirometric measurements were made on soil samples collected at three depths in semi‐natural oak woodlands at three different sites in southwest Ireland. It is assumed that the organic matter evolves from a less to a higher mature state as soil depth increases. The maturity state could be chemically defined by the redox state. The proposed methods yield the enthalpy change, Gibbs energy change and entropy change for the microbial catabolism and combustion reactions of the soil organic matter. The degree of reduction was calculated by the enthalpy changes. Results show the soil organic matter becomes more reduced from the soil organic surface to mineral soils. The top layer is characterized by high carbon content, organic materials with low energy content per Cmole, and fast biodegradation rates. Mineral soils are characterized by low carbon content, organic materials with high energy content per Cmole, and slow biodegradation rates. Values obtained for the entropy change were sensitive to these differences among the different soil layers. These results contribute to unlock the thermodynamics of the soil reactions and to develop the bioenergetics of soil ecosystems.

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Section: Resultsmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 92%

Thermodynamics of soil organic matter decomposition in semi‐natural oak (Quercus) woodland in southwest Ireland

Barros

Fernández

Byrne

et al. 2020

Oikos

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“…For instance, one study shows that amorphous cellulose would have a b-relaxation intensity of 4-5 times greater than that for wood cellulose with 67 % crystallinity [28]. Thus, while crystalline cellulose might Table 2 Group vibrations in the 400-4000 cm -1 range assigned by experimental infrared and Raman spectroscopic studies [21,[42][43][44][45][46][47][48][49] Vibration mode Wavenumber (cm - Based on data from [30,[32][33][34][35] for the range 1-200 K a The skeletal contribution for amorphous wood cellulose was evaluated both by fitting Eq. (6) to experimental data in the 80-200 K range and using Debye temperatures for microcrystalline cotton cellulose experience an increase in conformational motion, this effect is considerably greater for amorphous cellulose.…”

Section: Resultsmentioning

confidence: 99%

“…3 Calculated and experimental c p for a-d cellulose of various origin, and e, f lignin extracted by two different methods. Based on data from a-c [30], d [31], e, f [35] motion. The external contribution is as for the other compounds found by Eq.…”

Section: Resultsmentioning

confidence: 99%

Explaining the heat capacity of wood constituents by molecular vibrations

Thybring

2013

J Mater Sci

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The heat capacity of wood and its constituents is important for the correct evaluation of many of their thermodynamic properties, including heat exchange involved in sorption of water. In this study, the dry state heat capacity of cellulose, hemicelluloses and lignin are mathematically described by fundamental physical theories relating heat capacity with molecular vibrations. Based on knowledge about chemical structure and molecular vibrations derived from infrared and Raman spectroscopy, heat capacities are calculated and compared with experimental data from literature for a range of bio-and wood polymers in the temperature range 5-370 K. A very close correspondence between experimental and calculated results is observed, illustrating the possibility of linking macroscopic thermodynamic properties with their physical nano-scale origin.

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“…The valuation of this bioresource is relatively interesting because lignin is the second component represented in the biomass after cellulose. Unfortunately, it has long been used as a fuel owing to its high calorific value (Voitkevich et al, 2012). Future research will help develop leads for the valuation of lignin.…”

Section: Affordable Bioproducts and Biofuelsmentioning

confidence: 99%

Production of biofuels and biomolecules in the framework of circular economy: A regional case study

2015

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Faced to the economic and energetic context of our society, it is widely recognised that an alternative to fossil fuels and oil-based products will be needed in the nearest future. In this way, development of urban biorefinery could bring many solutions to this problem. Study of the implementation of urban biorefinery highlights two sustainable configurations that provide solutions to the Walloon context by promoting niche markets, developing circular economy and reducing transport of supply feedstock. First, autonomous urban biorefineries are proposed, which use biological waste for the production of added value molecules and/or finished products and are energetically self-sufficient. Second, integrated urban biorefineries, which benefit from an energy supply from a nearby industrial activity. In the Walloon economic context, these types of urban biorefineries could provide solutions by promoting niche markets, developing a circular economy model, optimise the transport of supply feedstock and contribute to the sustainable development.

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Thermodynamic Properties of Plant Biomass Components. Heat Capacity, Combustion Energy, and Gasification Equilibria of Lignin

Cited by 45 publications

References 7 publications

Thermodynamics of soil organic matter decomposition in semi‐natural oak (Quercus) woodland in southwest Ireland

Thermodynamics of soil organic matter decomposition in semi‐natural oak (Quercus) woodland in southwest Ireland

Explaining the heat capacity of wood constituents by molecular vibrations

Production of biofuels and biomolecules in the framework of circular economy: A regional case study

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