Comparative investigation on thermal degradation of flue-cured tobacco with different particle sizes by a macro-thermogravimetric analyzer and their apparent kinetics based on distributed activation energy model

Gaofei, Guo; Liu, Chaoxian; Wang, Yalin; Xie, Shenglin; Zhang, Ke; Chen, Liangyuan; Zhu, Wenkui; Meizhou, Ding

doi:10.1007/s10973-019-08215-7

Cited by 15 publications

(7 citation statements)

References 36 publications

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“…There is still a lack of reasonable explanations for temperature drift. The internal reasons for its influence may come from two aspects: heat transfer and kinetics. − Since the particle diameter of the tobacco sample is less than 178 μm (80 mesh), this section will analyze the deviation of the pyrolysis curve of small-size particles at different heating rates from the perspective of kinetics heat release.…”

Section: Results and Discussionmentioning

confidence: 99%

Experimental and Kinetic Studies on Tobacco Pyrolysis under a Wide Range of Heating Rates

Peng

Tang

et al. 2021

ACS Omega

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In the present work, experimental and kinetic studies are conducted to explore and model tobacco pyrolysis characteristics under a wide range of heating conditions. First, thermal decomposition processes of a tobacco sample were investigated using thermogravimetric analysis/difference thermogravimetry (TGA/DTG) experiments under a wide range of heating rates (10–500 K/min), and the TGA/DTG profiles were compared to highlight the effect of heating rate on the pyrolysis characteristics. The results showed that the tobacco sample was sufficiently devolatilized at 1173.15 K (900 °C) and the final volatiles yields were not sensitive to the heating rate. Moreover, it was illustrated that the DTG curve presents a polymerization trend with the increase in heating rate. Then, kinetic parameters, including total component mass fraction, preexponential factor, and activation energy, were derived by deconvolution from TG/DTG profiles for each component with a one-step kinetic framework, and the correlations between kinetic parameters and heating rates were further explored and modeled. The results illustrated that four subpeaks can be found in the deconvolution, indicating the four components (volatile components, hemicellulose, cellulose, and lignin). In addition, the activation energy of each component was found to be insensitive with heating rate (with standard deviation less than 20%). Therefore, an average activation energy was used for each component to avoid the compensation effect and a power correlation between the heating rate and the preexponential factor could be found. A posteriori analysis also confirmed the validity of this correlation.

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Section: Results and Discussionmentioning

confidence: 99%

Experimental and Kinetic Studies on Tobacco Pyrolysis under a Wide Range of Heating Rates

Peng

Tang

et al. 2021

ACS Omega

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“…The pyrolysis and combustion kinetics of various fibers are essential for the multipurpose utilization of biomass materials, because pyrolysis is an effective way to convert plant fibers into high-value-added chemicals and bioenergy [5][6][7][8][9]. Compared with model method, model-free kinetics, as Friedman method [10][11][12][13][14], Vyazovkin method [10,13,15], Ozawa method [16,17], Kissinger-Akahira-Sunose (KAS) method [13,15,18], Flynn-Wall-Ozawa (FWO) method [13,15,18], and distributed activation energy model (DAEM) [11,[19][20][21][22], could reduce the errors introduced by the model fit. According to Friedman method [11,13,16], the pyrolysis and combustion processes of different plant fibers by using multiple heating rate programs were used to obtain reliable kinetics, in order to reveal their pyrolysis and combustion properties.…”

Section: Introductionmentioning

confidence: 99%

Study on Pyrolysis Behaviors of Various Plant Fibers

Zhang¹,

Zheng²,

Guo³

et al. 2023

Cellulose - Fundamentals and Conversion Into Biofuel and Useful Chemicals

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Pyrolysis is an effective way to convert plant fibers into high-value-added chemicals and bioenergy. The pyrolysis behavior of plant fibers varies with their compositions. A high-performance anion-exchange chromatography integrated pulse amperometric method was established to detect the composition of arabinose, galactose, glucose, xylose, and mannose in plant fiber hydrolysate. The contents of cellulose, hemicellulose, and lignin in six plant fibers were calculated. Furthermore, the pyrolysis kinetic parameters of the plant fibers and their pyrolysis product distribution depending on chemical compositions were analyzed. The pyrolysis of flax fiber with high cellulose content (92.19%) tended to generate ketones, accounting for about 37.3% of the total product distribution, while coniferous and broadleaf fiber with high hemicellulose contents (13.23 and 15.07%, respectively) was more likely to generate aldehydes and hydrocarbons. Furthermore, the result of pyrolysis of a grass fiber demonstrated the interactions between its chemical components, which had been captured during pyrolysis from the perspective of pyrolysis product distribution that inhibits the pyrolysis to generate CO2, and promoted the generation of furan, phenols, and toluene, to different degrees. The research results are expected to provide basic data and theoretical support for obtaining high-value-added chemicals and biomass energy through the pyrolysis of plant fibers.

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“…Tobacco is a plant material and consists of some 3800 constituents, ranging from small organic and inorganic molecules to biopolymers. , Owing to the importance of an in-depth understanding of tobacco’s pyrolysis, considerable researches are focusing on this topic. Experimental methods, such as gas chromatography/mass spectrometry (Py-GC/MS), , thermogravimetric analyzer coupled with Fourier transform infrared spectrometry (TG-FTIR), − macro-thermogravimetric (macro-TGA), and thermogravimetric mass spectrometry (TG-MS) , were usually used to investigate the pyrolysis of tobacco, including studying the effect of oxygen on in situ evolution of chemical structures during tobacco’s pyrolysis, finding the pyrolysis character and major pyrolysis products, investigating the effect of different tobacco particle sizes on pyrolysis, and revealing how the volatile products formed . Compared with experimental studies, there have been fewer studies establishing models for tobacco pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

Toba-CPD: An Extended Chemical Percolation Devolatilization Model for Tobacco Pyrolysis

et al. 2022

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Tobacco features chemical compositions different from that of raw lignocellulosic biomass. Currently, the performance of network models, like Bio-Chemical Percolation Devolatilization (Bio-CPD), on tobacco pyrolysis is unclear, and only global kinetics have been proposed for tobacco devolatilization, which does not have the versatility for a wide range of heating conditions and tobacco types. To address this issue, the present work first assessed the performance of the Bio-CPD model on tobacco pyrolysis through an a priori study, which showed large deviations. Afterward, an extended Chemical Percolation Devolatilization model for tobacco pyrolysis (Toba-CPD) was developed by modifying the kinetic parameters using a grid-search optimization strategy. The process of grid-search optimization strategy is based on the kinetic parameters of the Bio-CPD model and modified with experimental results of 11 tobacco types under a wide range of heating rates. Finally, the performance of Toba-CPD was measured with experimental results which were not used during parameters optimization. Results demonstrated that the Toba-CPD models could well reproduce the pyrolysis of various tobacco types under a wide range of heating rates (R 2 > 0.957).

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Comparative investigation on thermal degradation of flue-cured tobacco with different particle sizes by a macro-thermogravimetric analyzer and their apparent kinetics based on distributed activation energy model

Cited by 15 publications

References 36 publications

Experimental and Kinetic Studies on Tobacco Pyrolysis under a Wide Range of Heating Rates

Experimental and Kinetic Studies on Tobacco Pyrolysis under a Wide Range of Heating Rates

Study on Pyrolysis Behaviors of Various Plant Fibers

Toba-CPD: An Extended Chemical Percolation Devolatilization Model for Tobacco Pyrolysis

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