Kinetic study and pyrolysis characteristics of algal and lignocellulosic biomasses

Vasudev, Vikul; Ku, Xiaoke; Lin, Jianzhong

doi:10.1016/j.biortech.2019.121496

Cited by 67 publications

(23 citation statements)

References 30 publications

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“…The equation Z (α) can be obtained by combining the differential and integral forms of the reaction model. Vasudev et al 30 used some ideal dynamics models (differential and integral forms) observed in the solid-state reaction, and the primary graph method was used to change the equation of zetas Z (α) into a standardized equation of zetas . The term does not affect the shape of the functional equation.…”

Section: Methodsmentioning

confidence: 99%

“…Figure 1 shows the function of and the conversion rate of the α SLS x -CF-M composite film at β = 30 °C/min. By comparing and screening the experimental curve (EXP) with the curves of each reaction model, according to the reaction mechanism function proposed by Vasudev et al, 30 the mechanism function used in this paper is Figure 2 shows the fitting curve of the SLS x -CF-M composite film mechanism function. The value of H (α) can be obtained by substituting the corresponding value of conversion in eq 18 through the triglyceride test.…”

Section: Methodsmentioning

confidence: 99%

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Pyrolysis Kinetics of a Lignin-Modified Cellulose Composite Film

Yang

2021

ACS Omega

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Cellulose is the most abundant natural biopolymer material, which has been widely used in film making and food packaging in recent years. However, lignin, a natural bioaromatic material, is always applied as a waste resource due to its low utilization efficiency. In this study, a ZnCl 2 /CaCl 2 /cellulose mixed system was used to prepare film materials via a regeneration method. The chemical structure and corresponding properties were characterized. The thermal decomposition process of film materials showed that with an increase of the heating rate, the maximum weight loss temperature gradually shifted to the higher-temperature region. Additionally, the combination of lignin with cellulose as composite films can effectively improve thermal stability. Furthermore, kinetics methods such as Kissing–Akahira–Sunose (KAS), Flynn–Wall–Ozawa (FWO), and Friedman were used to calculate the average activation energy ( E ). This study proposed a facile method for preparing biobased multifunctional composite films using two kinds of naturally renewable materials.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Pyrolysis Kinetics of a Lignin-Modified Cellulose Composite Film

Yang

2021

ACS Omega

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“…The decomposition process of lignin epoxy resin composite material is a solid state reaction process [ 27 , 28 ]. Generally, the rate of thermal decomposition can be expressed as a function of the degree of conversion f ( α ) and temperature K ( T ), as shown in Equation (1) [ 29 ]:

where α is the conversion rate (%) of the sample in the reaction temperature range, β is the linear heating rate (°C/min), T is the reaction temperature ( K ) and P is the pressure (Pa).…”

Section: Methodsmentioning

confidence: 99%

Thermal Kinetics of a Lignin-Based Flame Retardant

Liang

Wang

et al. 2020

Polymers

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In order to improve the thermal property of epoxy resin (EP), a lignin-based flame retardant was prepared. Focusing on the lignin-based flame retardant, this paper investigates its pyrolysis behavior and kinetics via a thermogravimetric analyzer coupled with Fourier transform infrared spectrometry (TG–FTIR). Based on the FTIR result, which showed a peak at 1222 cm−1, it was assigned a syringyl structure. Its absorption peak intensity was enhanced and this meant that the phenolization of the lignin was successful. Thermogravimetry/derivative thermogravimetry (TG/DTG) results showed that the carbon residues of F-lignin and F-lignin@APP were reduced to 33.5% and 37.5%, respectively. In addition, the maximum decomposition rate of F-lignin@APP20/EP is 11.8%/min, which is 8%/min and 4.7%/min lower than for EP and Al-lignin, respectively. The char residue of F-lignin@APP20/EP is 32.5%, which is much higher than for EP. Lower decomposition rate and higher char residue indicate the improvement of thermal stability of EP by F-lignin@APP. Moreover, the kinetics of Al-lignin20/EP and F-lignin@APP20/EP were conducted by two kinetic methods: Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS). It was concluded that the pyrolysis process of Al-lignin 20/EP and F-lignin@APP 20/EP could be divided into three stages, while the value and growth rate of the activation energy of F-lignin@APP 20/EP were much higher than that of Al-lignin 20/EP in stage III.

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“…Thus, algae helps in greenhouse gas sequestration [ 96 , 97 ]. Innumerous articles published on pyrolysis of algae is a supplement for aspirants on algal fuel [ [98] , [99] , [100] , [101] ]. Yanik and Sinag pyrolyzed algae Laminaria digitate and fucus serratus at 500 °C in fluid reactor [ 102 ].…”

Section: Unprocessed Algal Oils As Biofuelsmentioning

confidence: 99%