Kinetics and Mechanisms for Copyrolysis of Palm Empty Fruit Bunch Fiber (EFBF) with Palm Oil Mill Effluent (POME) Sludge

Chong, Yen Yee; Thangalazhy‐Gopakumar, Suchithra; Gan, Suyin; Ng, Hoon Kiat; Lee, Lai Yee; Adhikari, Sushil

doi:10.1021/acs.energyfuels.7b00877

Cited by 33 publications

(17 citation statements)

References 55 publications

(107 reference statements)

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“…Model-fitting methods are commonly applied because of their ability to determine the kinetic parameters directly and to offer information about possible reaction mechanisms. Different reaction models have been proposed (Aboulkas and El Bouadili, 2010; Chong et al, 2017; Khawam and Flanagan, 2006; Ma et al, 2018) and kinetic parameters can be determined based on these models. The expressions of g (α) for the different reaction mechanisms used in this work are listed in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Kinetic studies on the pyrolysis of plastic waste using a combination of model-fitting and model-free methods

Yao

et al. 2020

Waste Manag Res

115

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In this work, the pyrolysis behavior of plastic waste—TV plastic shell—was investigated, based on thermogravimetric analysis and using a combination of model-fitting and model-free methods. The possible reaction mechanism and kinetic compensation effects were also examined. Thermogravimetric analysis indicated that the decomposition of plastic waste in a helium atmosphere can be divided into three stages: the minor loss stage (20–300°C), the major loss stage (300–500°C) and the stable loss stage (500–1000°C). The corresponding weight loss at three different heating rates of 15, 25 and 35 K/min were determined to be 2.80–3.02%, 94.45–95.11% and 0.04–0.16%, respectively. The activation energy ( Ea) and correlation coefficient ( R2) profiles revealed that the kinetic parameters calculated using the Friedman and Kissinger–Akahira–Sunose method displayed a similar trend. The values from the Flynn–Wall–Ozawa and Starink methods were comparable, although the former gave higher R2 values. The Eα values gradually decreased from 269.75 kJ/mol to 184.18 kJ/mol as the degree of conversion ( α) increased from 0.1 to 0.8. Beyond this range, the Eα slightly increased to 211.31 kJ/mol. The model-fitting method of Coats–Redfern was used to predict the possible reaction mechanism, for which the first-order model resulted in higher R2 values than and comparable Eα values to those obtained from the Flynn–Wall–Ozawa method. The pre-exponential factors (ln A) were calculated based on the F1 reaction model and the Flynn–Wall–Ozawa method, and fell in the range 59.34–48.05. The study of the kinetic compensation effect confirmed that a compensation effect existed between Ea and ln A during the plastic waste pyrolysis.

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Section: Methodsmentioning

confidence: 99%

Kinetic studies on the pyrolysis of plastic waste using a combination of model-fitting and model-free methods

Yao

et al. 2020

Waste Manag Res

115

View full text Add to dashboard Cite

show abstract

“…Model-fitting method is commonly applied, attributing to its availability of determining the kinetic parameters directly. Different reaction models have been proposed (Aboulkas and El Bouadili, 2010; Chong et al, 2017; Khawam and Flanagan, 2006; Ma et al, 2018b) and kinetic parameters can be determined based on these models. For the model-free method, there are no previous assumptions about the reaction model and allows the kinetic parameters to be calculated as a function of α (degree of conversion).…”

Section: Methodsmentioning

confidence: 99%

Comparative study on the pyrolysis kinetics of polyurethane foam from waste refrigerators

Yao

et al. 2019

Waste Manag Res

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Thermal treatment offers advantages of significant volume reduction and energy recovery for the polyurethane foam from waste refrigerators. In this work, the pyrolysis kinetics of polyurethane foam was investigated using the model-fitting, model-free and distributed activation energy model methods. The thermogravimetric analysis indicated that the polyurethane foam decomposition could be divided into three stages with temperatures of 38°C–400°C, 400°C–550°C and 550°C–1000°C. Peak temperatures for the major decomposition stage (<400°C) were determined as 324°C, 342°C and 344°C for heating rates of 5, 15 and 25 K min-1, respectively. The activation energy ( Eα) from the Friedman, Flynn–Wall–Ozawa and Tang methods increased with degree of conversion ( α) in the range of 0.05 to 0.5. The coefficients from the Flynn–Wall–Ozawa method were larger and the resulted Eα values fell into the range of 163.980–328.190 kJ mol-1 with an average of 206.099 kJ mol-1. For the Coats–Redfern method, the diffusion models offered higher coefficients, but the E values were smaller than that from the Flynn–Wall–Ozawa method. The Eα values derived from the distributed activation energy model method were determined as 163.536–334.231 kJ mol-1, with an average of 206.799 kJ mol-1. The peak of activation energy distribution curve was located at 205.929 kJ mol-1, consistent with the thermogravimetric results. The Flynn–Wall–Ozawa and distributed activation energy model methods were more reliable for describing the polyurethane foam pyrolysis process.

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“…Obvious differences in the pyrolysis of the original OPEFB/SWP from blend were noticed in the central pyrolysis region. The blends showed two peaks, with the DTG peak height and positions depicting the reactivity of the materials [40]. For instance, with the increase in biomass weight percentage in the blend, the reactivity and the mass loss rate of blends decreased significantly, depicting some degree of interaction between the two samples.…”

Section: Thermal Characteristicsmentioning

confidence: 99%

Thermal Analysis of Nigerian Oil Palm Biomass with Sachet-Water Plastic Wastes for Sustainable Production of Biofuel

et al. 2019

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Nigeria, being the world’s largest importer of diesel-powered gen-sets, is expected to invest in bio-fuels in the future. Hence, it is important to examine the thermal properties and synergy of wastes for potential downstream resource utilization. In this study, thermal conversion as a route to reduce the exploding volume of wastes from sachet-water plastic (SWP) and oil palm empty fruit bunch (OPEFB) biomass was studied. Thermogravimetric (TGA) and subsequent differential scanning calorimeter (DSC) was used for the analysis. The effect of heating rate at 20 °C min−1 causes the increase of activation energy of the decomposition in the first-stage across all the blends (0.96 and 16.29 kJ mol−1). A similar phenomenon was seen when the heating rate was increased from 10 to 20 °C min−1 in the second-stage of decomposition. Overall, based on this study on the synergistic effects during the process, it can be deduced that co-pyrolysis can be an effective waste for energy platform.

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Kinetics and Mechanisms for Copyrolysis of Palm Empty Fruit Bunch Fiber (EFBF) with Palm Oil Mill Effluent (POME) Sludge

Cited by 33 publications

References 55 publications

Kinetic studies on the pyrolysis of plastic waste using a combination of model-fitting and model-free methods

Kinetic studies on the pyrolysis of plastic waste using a combination of model-fitting and model-free methods

Comparative study on the pyrolysis kinetics of polyurethane foam from waste refrigerators

Thermal Analysis of Nigerian Oil Palm Biomass with Sachet-Water Plastic Wastes for Sustainable Production of Biofuel

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