Pyrolysis Kinetics Using TGA and Simulation of Gasification of the Microalga Botryococcus braunii

Arbeláez, Andrés; Giraldo, Néstor David; Pérez, Juan F.; Atehortúa, Lucía

doi:10.1007/s12155-019-10037-2

Cited by 11 publications

(6 citation statements)

References 48 publications

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“…braunii, the second stage (156–545 °C) included active copyrolysis, which involved the largest mass reduction (46–48%), due to the decomposition of carbohydrates, proteins (250–280 °C), chlorophyll, and lipids (380–480 °C) from microalgae as well as lignin- or cellulose-derived materials, phenolic aromatic carbons, substituted aliphatic carbons, and other oxygen-containing compounds in VBC. These compounds underwent depolymerization, decarboxylation, and cracking processes releasing volatile molecules, H 2 O, CO 2 , and CO. ,,,,− …”

Section: Resultsmentioning

confidence: 99%

“…The results showed that an increase in the heating rate in the pyrolysis or copyrolysis process increased the temperature range of the active pyrolysis (higher T initial and T final ). The increase in the active pyrolysis temperature may be due to the rapid increase of the temperature difference between the particle surface and core, resulting in a gradient that supported the heat transfer . An increase in the heating rate can cause the ambient temperature to pass through a wider interval per unit time.…”

Section: Resultsmentioning

confidence: 99%

“…The kinetic of B. braunii pyrolysis have been studied previously using both model-free and model-fitting methods. , …”

Section: Introductionmentioning

confidence: 99%

“…37 The kinetic of B. braunii pyrolysis have been studied previously using both model-free and model-fitting methods. 38,39 In this paper, we report the kinetic analysis of the copyrolysis of B. braunii and VBC using model-free kinetic methods, specifically the Kissinger−Akahira−Sunose (KAS), 40 Flynn−Wall−Ozawa (FWO), 41 and Friedman 42 methods. These three methods were chosen based on several reasons: (1) these three kinetic models are the most common methods used to determine the activation energy value of biomass using the pyrolysis method, (2) they are easier to use to determine the value of activation energy, and (3) they have better accuracy than other model-free methods.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic Study of Copyrolysis of the Green Microalgae Botryococcus braunii and Victorian Brown Coal by Thermogravimetric Analysis

et al. 2021

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The copyrolysis of the green microalgae Botryococcus braunii and Victorian brown coal was studied by thermogravimetric analysis using the Kissinger−Akahira−Sunose (KAS), Flynn−Wall−Ozawa (FWO), and Friedman methods. This research aims to study the synergistic effect of mixing B. braunii and Victorian brown coal in pyrolysis reactions on the kinetic parameter using thermogravimetric analysis. Copyrolysis was carried out at four heating rates, 10, 15, 20, and 25 °C/min. The copyrolysis reaction of B. braunii and Victorian brown coal occurred from 155.79 to 545.27 °C; this temperature range was lower than that for the pyrolysis of only B. braunii under the same conditions. However, mixing the two samples increased the thermal decomposition temperature for each conversion value (α), as well as the average activation energy, due to the presence of compounds that require high temperatures to undergo pyrolysis in the Victorian brown coal. The average activation energies of the copyrolysis reaction of B. braunii and Victorian brown coal determined using the KAS, FWO, and Friedman methods were 195.20

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The kinetic of B. braunii pyrolysis have been studied previously using both model-free and model-fitting methods. , …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Kinetic Study of Copyrolysis of the Green Microalgae Botryococcus braunii and Victorian Brown Coal by Thermogravimetric Analysis

et al. 2021

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“…The thermogravimetric analysis is essential for the production of activated carbon from a new precursor that did not present previous studies in the literature ( González-García, 2018 ). The curves obtained during the analysis demonstrate the thermal conversion structural changes in material, and the differential thermogravimetry highlights the different stages precisely ( Arbeláez et al, 2019 ).…”

Section: Resultsmentioning

confidence: 94%

New low-cost biofilters for SARS-CoV-2 using Hymenachne grumosa as a precursor

Demarco

Afonso

Schoeler

et al. 2022

Journal of Cleaner Production

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The ongoing global spread of COVID-19 (SARS-CoV-2 2019 disease) is causing an unprecedented repercussion on human health and the economy. Despite the primary mode of transmission being through air droplets and contact, the transmission via wastewater is a critical concern. There is a lack of techniques able to provide complete disinfection, along with the uncertainty related to the behavior of SARS-CoV-2 in the natural environment and risks of contamination. This fact makes urgent the research towards new alternatives for virus removal from water and wastewater. Thus, this research aimed to characterize new lost-cost adsorbents for SARS-CoV-2 using Hymenachne grumosa as a precursor and verify its potential for removing SARS-CoV-2 from the solution. The aquatic macrophyte H. grumosa had in natura and activated carbon produced with H. grumosa and zinc chloride (ZnCl 2, 1:1) impregnation and carbonization (700 °C, 1 h) were incubated for 24 h with inactivated SARS-CoV-2 viral suspension, and then the ribonucleic acid (RNA) was extracted and viral load quantified through reverse transcription-quantitative polymerase chain reaction (RT-qPCR) technique. The results demonstrated the great adsorption potential, achieving removal of 98.44% by H. grumosa “in natura” , and 99.61% by H. grumosa with carbon activation, being similar to commercial activated carbon (99.67%). Thus, this study highlights the possibility of low-cost biofilters to be used for SARS-CoV-2 removal, as an excellent alternative for wastewater treatment or watercourses decontamination.

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A Comprehensive Study on Extracellular Green Synthesis, Antibacterial Activity and Process Design of Metallic Nanoparticles from Botryococcus braunii Microalga

Koçer

Özçimen

2023

JOM

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Pyrolysis Kinetics Using TGA and Simulation of Gasification of the Microalga Botryococcus braunii

Cited by 11 publications

References 48 publications

Kinetic Study of Copyrolysis of the Green Microalgae Botryococcus braunii and Victorian Brown Coal by Thermogravimetric Analysis

Kinetic Study of Copyrolysis of the Green Microalgae Botryococcus braunii and Victorian Brown Coal by Thermogravimetric Analysis

New low-cost biofilters for SARS-CoV-2 using Hymenachne grumosa as a precursor

A Comprehensive Study on Extracellular Green Synthesis, Antibacterial Activity and Process Design of Metallic Nanoparticles from Botryococcus braunii Microalga

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