Determination of kinetic parameters of biomass samples using thermogravimetric analysis

Parthasarathy, Prakash; Narayanan, Sheeba

doi:10.1002/ep.11763

Cited by 71 publications

(49 citation statements)

References 34 publications

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“…Conversion (α) in the pyrolysis of karanja seed cake is calculated from TGA data using the equation given below: (7) where m i , m α , and m f are initial, instantaneous, and final mass of the samples, respectively.…”

Section: Model-fitting Approachmentioning

confidence: 99%

Study of thermal behavior of deoiled karanja seed cake biomass: thermogravimetric analysis and pyrolysis kinetics

Muktham

Ball²,

Bhargava³

et al. 2016

Energy Science & Engineering

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Karanja is a medium sized evergreen tree which has minor economic importance in India. The nonedible seed kernel contains 27-30% oil that is used for biodiesel production, leaving the remaining nonedible seed cake as a waste product. The aim of the present work was to obtain kinetic parameters in relation to technological parameters in nonedible seed cake biomass pyrolysis conversion process to bio-oil and biochar. Effects of heating rate on karanja seed cake slow pyrolysis behavior and kinetic parameters were investigated at heating rates of 5, 10, and 20°C/min using thermogravimetric analysis (TGA). Thermogravimetric experiments showed the onset and offset temperatures of the devolatilization step shifted toward the high-temperature range, and the activation energy values increased with increasing heating rate. In the present study, isoconversional method was applied for the pyrolysis of karanja seed cake biomass by TGA and the activation energies (118-124 kJ/mol) and the pre-exponential factors obtained using progressive conversion. Proximate-ultimate analyses, energy value, surface structure, and Fourier transform infrared spectra of the biomass processed under conditions were reported. The pyrolysis resulted in upgradation of the energy value of seed cake biomass from 18.1 to 24.5 MJ/kg; importantly with high carbon and low oxygen contents. The approach represents a novel method for the upgrading of karanja seed cake that has significant commercial potential. 87

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Section: Model-fitting Approachmentioning

confidence: 99%

Study of thermal behavior of deoiled karanja seed cake biomass: thermogravimetric analysis and pyrolysis kinetics

Muktham

Ball²,

Bhargava³

et al. 2016

Energy Science & Engineering

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“…Experimental and theoretical studies on oxy‐fuel combustion have principally focused on coal combustion . Thermogravimetric analysis (TGA), drop tube furnace, wire‐mesh reactor, and Hencken burner combustion system have been experimentally used . Previous results have demonstrated that coal ignition is delayed in O 2 /CO 2 rather than in O 2 /N 2 atmosphere because the molar heat capacity of CO 2 is higher than that of N 2 and because CO 2 suppresses radical formation.…”

Section: Introductionmentioning

confidence: 99%

Kinetics investigation on the combustion of biochar in O₂/CO₂ atmosphere

Wang

Deng

et al. 2014

Env Prog and Sustain Energy

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Oxy-biomass combustion produces negative CO 2 emissions. This study investigated the combustion kinetics of biochar in O 2 /CO 2 atmosphere using a thermo-gravimetric analyzer. The effects of atmosphere, O 2 concentration, and fuel type were considered in this investigation. Results show that the reaction order of biochar combustion ranges from 0.5 to 1. Furthermore, the kinetic compensation effect can be observed between the apparent activation energy E and the frequency factor A. This relation is given by lnA 5 0.181E 2 14.618. Compared with O 2 /N 2 atmosphere, O 2 /CO 2 atmosphere delays biochar ignition and reduces activation energy. The ignition temperature of straw char is significantly lower than that of wood and coal char. The apparent activation energy of char combustion follows the inequality wood char > straw char > coal char. This result indicates that biochar combustion is more sensitive to temperature than coal char combustion. The reactivity of char combustion improves with increasing O 2 concentration, but biochar has a lower degree of improvement than coal char. The change from air combustion to oxy-fuel combustion and the increase in O 2 concentration exert minimal effects on biochar combustion than on coal char combustion.

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“…Since each constituent of the biomass degrades at a different rate according to its chemical composition, it seems unquestionable that the same kinetic parameters can be calculated for the whole thermal degradation . Figure shows the behavior of

\ln true[true(- \ln (1 - α) true) / T ² true]

versus 1/ T for heating rates of 5, 15, and 30 K/min, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Later, two temperature intervals were adopted to obtain consecutive kinetic parameters for the stages of devolatilization and char formation . In recent works, three intervals, corresponding to the stages of drying, devolatilization, and char formation, were defined for the kinetic analysis .…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis and thermogravimetry of blended and nonblended residues of pine and eucalyptus forestry woods

Costa

Vieira

Girotto

et al. 2016

Env Prog and Sustain Energy

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In this article, we present the results of the thermogravimetric analysis (TGA) of blended and nonblended residues of Pinus taeda and Eucalyptus benthamii submitted to thermal degradation at heating rates of 5, 15, and 30 K/min, up to a maximum of 900 K. The temperature range is divided into three intervals (corresponding to the pyrolysis stages of drying, devolatilization, and char formation) and each thermal evolution curve is fitted by a modified version of the Coats–Redfern method. The kinetic parameters of the Arrhenius equation are then calculated. The adoption of three temperature intervals provides a better approximation and yields more realistic values, when compared to the single‐temperature interval approach found in most of the consulted literature. Kinetic analysis shows that each evolution profile can be represented as a single first‐order reaction. Moisture, volatile matter, ash, and fixed carbon contents are measured. Among the wood residues investigated, sawdust mixtures and barks of pine seem to be the most suitable fuels for heat generation. On one hand, the practical aim of this study is to advance the use of biomass residues as a renewable energy source among local industries. On the other hand, in theoretical terms, results might help devise new mathematical models and more efficient reaction mechanisms for the heterogeneous combustion of solid particles, which is a complex phenomenon still to be fully understood. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1521–1528, 2016

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Determination of kinetic parameters of biomass samples using thermogravimetric analysis

Cited by 71 publications

References 34 publications

Study of thermal behavior of deoiled karanja seed cake biomass: thermogravimetric analysis and pyrolysis kinetics

Study of thermal behavior of deoiled karanja seed cake biomass: thermogravimetric analysis and pyrolysis kinetics

Kinetics investigation on the combustion of biochar in O₂/CO₂ atmosphere

Pyrolysis and thermogravimetry of blended and nonblended residues of pine and eucalyptus forestry woods

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Determination of kinetic parameters of biomass samples using thermogravimetric analysis

Cited by 71 publications

References 34 publications

Study of thermal behavior of deoiled karanja seed cake biomass: thermogravimetric analysis and pyrolysis kinetics

Study of thermal behavior of deoiled karanja seed cake biomass: thermogravimetric analysis and pyrolysis kinetics

Kinetics investigation on the combustion of biochar in O2/CO2 atmosphere

Pyrolysis and thermogravimetry of blended and nonblended residues of pine and eucalyptus forestry woods

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Product

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Kinetics investigation on the combustion of biochar in O₂/CO₂ atmosphere