Kinetic Study on The Slow Pyrolysis of Isolated Cellulose and Lignin from Teak Sawdust

Kristanto, Jonas; Daniyal, Ahmad Fahmi; Pratama, Dimas Yoga; Bening, Islamey Noer Manikam; Setiawan, Lunardi; Azis, Muhammad Mufti; Purwono, Suryo

doi:10.1016/j.tca.2022.179202

Cited by 14 publications

(1 citation statement)

References 68 publications

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“…The fourth research project suggested that the thermal resistance of sawdust blocks can slow down the propagation rate of the pyrolysis process [20]. The fifth research project demonstrated that the devolatilization kinetics of sawdust during pyrolysis can be studied using thermogravimetric analyzers to understand the process and obtain global kinetic parameters [21], [22]. The sixth research project highlighted that high sawdust density in the bio stove produces a larger heat propagation area and a faster heating rate [23].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Propagation of Temperature and Thermal Conductivity of Sawdust Pyrolysis Process with Modeling Fea and Experiment

David Rey,

Mujiyono,

Nurhadiyanto

et al. 2024

Int. J. Adv. Sci. Eng. Inf. Technol.

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The study uses densified sawdust with heat propagation and thermal conductivity to achieve better pyrolysis and gasification processes. Analysis of sawdust's heat propagation and thermal conductivity during pyrolysis was developed with Finite Element Analysis (FEA). The thermal conductivity values of sawdust (k) obtained from FEA are 1.49, 1.3, 1.1, and 0.7 W/m C considering the sawdust heated with a triggering temperature (T0) 535 ºC and reaches a constant temperature of T1 = 265 ºC, T2 = 165 ºC, T3 = 115, and T4 = 95 ºC respectively after 20 minutes. The temperature distribution of sawdust heated shows between the experimental and FEA results is quite the same; however, differences on graph T1 show the experimental thermal conductivity (k) value is distinct from the simulated thermal conductivity (k) value due to a significant change that occurred as sawdust transformed into charcoal at minute 70, where the distance between point T1 and the trigger point (T0) is 40mm and after 180 minutes the sawdust had turned into charcoal completely. Furthermore, 31 grams (6.46%) of sawdust underwent pyrolysis in this experiment. The findings can aid future research and development in this field and provide valuable insight into the duration of time a bio stove utilizing compacted sawdust can produce a sustainable flame and be used as a reference for future experiments.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Propagation of Temperature and Thermal Conductivity of Sawdust Pyrolysis Process with Modeling Fea and Experiment

David Rey,

Mujiyono,

Nurhadiyanto

et al. 2024

Int. J. Adv. Sci. Eng. Inf. Technol.

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Problems with the determination of activation energy as function of the reacted fraction from thermoanalytical experiments

Várhegyi

2023

J Therm Anal Calorim

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The so-called compensation effect is well known between the activation energy, E, and the pre-exponential factor, A. The present work shows by examples that much higher compensation effects may arise when E and A vary with the reacted fraction. For this purpose, a set of five simulated experiments were constructed by first-order kinetics with E = 200 kJ mol−1 at a wide range of heating rates. These data were evaluated by the method of least squares assuming E and A as functions of the reacted fraction. Such E functions were found which highly differed from a constant E while described well the evaluated data. They included a linearly increasing E and several parabolic E functions. The observed effects may contribute to the contradictory kinetic parameters that were reported in the literature of the isoconversional (“model-free”) studies. It was found that the compensation effects between E and A functions can be 8–11 times higher than between E and A values.

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Process parameter variation of Melia azedarach sawdust pyrolysis for fuel properties, physicochemical characterization, and in-depth speciation analysis

Agnihotri

Mondal

2023

Biomass Conv. Bioref.

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Kinetic Study on The Slow Pyrolysis of Isolated Cellulose and Lignin from Teak Sawdust

Cited by 14 publications

References 68 publications

Analysis of the Propagation of Temperature and Thermal Conductivity of Sawdust Pyrolysis Process with Modeling Fea and Experiment

Analysis of the Propagation of Temperature and Thermal Conductivity of Sawdust Pyrolysis Process with Modeling Fea and Experiment

Problems with the determination of activation energy as function of the reacted fraction from thermoanalytical experiments

Process parameter variation of Melia azedarach sawdust pyrolysis for fuel properties, physicochemical characterization, and in-depth speciation analysis

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