Revealing the influence of chemical compounds on the pyrolysis of lignocellulosic wastes from the Amazonian production chains

Protásio, Thiago de Paula; Costa, Jéssica Saraiva da; Scatolino, Mário Vanoli; Lima, Michael Douglas Roque; Assis, Maíra Reis de; Silva, M. G. da; Bufalino, Lina; Dias, Ananias Francisco; Trugilho, Paulo Fernando

doi:10.1007/s13762-021-03416-w

Cited by 14 publications

(2 citation statements)

References 56 publications

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“…In all samples, mass loss with temperature occurred gradually and exhibited similar behaviors (Figure 3). The TGA profiles obtained in this study were similar to those reported by Fatmawati et al [91] and Protásio et al [57]. The TGA and DTA curves portrayed in Figure 3 reveal that the thermal degradation of lignocellulosic biomass can be roughly separated into three regions (I up to 150 • C; II 150-450 • C; III >450 • C), and the process is perceived to occur as two major events.…”

Section: Tga and Dta Analysessupporting

confidence: 87%

Comparative Study of Pretreatments on Coconut Fiber for Efficient Isolation of Lignocellulosic Fractions

Vieira,

Santana,

Jesus

et al. 2024

Sustainability

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Pretreatment is an essential step for breaking the recalcitrant structure of lignocellulosic biomass and allowing conversion to high-value-added chemicals. In this study, coconut fiber was subjected to three pretreatment methods to compare their impacts on the biomass’s structural characteristics and their efficiency in fractionating the biomass. This comparative approach was conducted to identify mild biomass pretreatment conditions that efficiently extract lignin and recover cellulose-rich pulp for the production of bioproducts. To this end, autohydrolysis, alkaline, and organosolv pretreatments were performed under different experimental conditions, and the physicochemical properties of the samples were evaluated using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and chemical characterization of the cellulose, hemicellulose, and lignin fractions. Therefore, efficient experimental conditions were identified to pretreat coconut fibers with an extended understanding of the methods to process lignocellulose. Great delignification efficiency and pulp yield were obtained with organosolv > alkaline extraction > autohydrolysis under the selected conditions of 2 h at 185 °C in the presence of a catalyst, namely, 0.5 M NaOH, for 2 h at 55 °C and 20 min at 195 °C, respectively. FT-IR revealed a predominance of hydroxyl groups in fibers obtained from alkaline and organosolv pretreatment, showing higher lignin degradation and cellulose concentration in these samples. TGA revealed mass loss curves with similar behaviors but different patterns and intensities, and MVE analysis showed differences on the surfaces of each sample. The comparison of experimental parameters allowed the identification of suitable conditions for each extraction method, and structural analyses identified the specific characteristics of the fibers that could be obtained according to the method used. Therefore, the results are of great importance for developing sustainable and effective industrial processes.

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Section: Tga and Dta Analysessupporting

confidence: 87%

Comparative Study of Pretreatments on Coconut Fiber for Efficient Isolation of Lignocellulosic Fractions

Vieira,

Santana,

Jesus

et al. 2024

Sustainability

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“…A mayor temperatura y tiempo de residencia de la biomasa residual en el reactor térmico, mayor será la estabilidad del biocarbón [35], pero también el rendimiento disminuye [20].…”

Section: Características De La Biomasa Y Del Biocarbónunclassified

Características principales del biocarbón derivado de restos de Theobroma cacao L. para su uso en suelos agrícolas

Barrezueta Unda,

Romero Bonilla,

Rios Hidalgo

2024

Rev. Colomb. Quim.

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La incorporación de biocarbono para mejorar los suelos agrícolas está ganando popularidad, pero hay poca información sobre las propiedades del biocarbono derivado de los restos de la cosecha de cacao. En la investigación se determinó varias características del biocarbono obtenido a través del proceso de pirólisis de la cáscara de las mazorcas de cacao. Los análisis realizados fueron: porcentajes de fibra lignocelulósica, análisis proximal, estructura microscópica y grupos funcional. También se realizó con el biocarbon un ensayo de adsorción con Cd+2 mediante un sistema de recirculación con agua, con el fin de obtener las isotermas de Langmuir y Freundlich. Los contenidos fibrosos abarcaban 56,2% celulosa, 27,07% lignina y 3,15% hemicelulosa. Con 8,15% de humedad y pH 9,86, se obtuvo un promedio de 35,58% de biocarbón. La forma de los poros fue irregular, se confirmó la presencia los grupos hidroxilo, carboxilo y carbonato. Los modelos de absorción indicaron una capacidad de adsorción máxima de 0,280 mL/g en Langmuir y una intensidad de absorción de Cd+2 de 0,06 en Freundlich. Si bien el biocarbón demostró propiedades adecuadas para suelos ácidos, su capacidad de adsorción resultó limitada en las condiciones evaluadas.

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Energy Sources Used in Food Preparation and Impacts on Climate Change

Carmona,

de Souza,

de Souza

et al. 2023

Green Energy and Technology

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Revealing the influence of chemical compounds on the pyrolysis of lignocellulosic wastes from the Amazonian production chains

Cited by 14 publications

References 56 publications

Comparative Study of Pretreatments on Coconut Fiber for Efficient Isolation of Lignocellulosic Fractions

Comparative Study of Pretreatments on Coconut Fiber for Efficient Isolation of Lignocellulosic Fractions

Características principales del biocarbón derivado de restos de Theobroma cacao L. para su uso en suelos agrícolas

Energy Sources Used in Food Preparation and Impacts on Climate Change

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