Fast pyrolysis of lignin-coated radiata pine

Moore, Andrew M.; Park, Sunkyu; Segura, Cristina; Carrier, Marion

doi:10.1016/j.jaap.2015.07.017

Cited by 17 publications

(18 citation statements)

References 45 publications

(64 reference statements)

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“…The fixed carbon contents for the banana peels, leaves and pseudostem were 2.7%, 7.6% and 1.21%, respectively, thus showing that banana leaves have the highest amounts of fixed carbon content. This corresponds to results of some prior works on non-woody biomasses like radiata pine 4.38% (Moore, Park, Segura, & Carrier, 2015), baltic sea green algae 5.1% (Plis et al, 2015), banana fruit bunch 0.2% (Abdullah et al, 2014), and sugar cane straw 6.7-8.3% (Fernandes et al, 2013 andMontoya et al, 2014). High fixed carbon contents are strong indicators of the banana wastes biomass suitability for thermochemical conversion processes like pyrolysis (Fernandes et al, 2013).…”

Section: Characterization Of Banana Wastes Biomassessupporting

confidence: 85%

Characterization of Banana Peels Wastes as Potential Slow Pyrolysis Feedstock

Kabenge¹,

Omulo²,

Banadda³

et al. 2018

JSD

108

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Uganda is the world’s second largest producer and consumer of banana after India. This has resulted into vast quantities of banana wastes, including the leaves, pseudostem, stalks, rejected and rotten fruits and the fruit peels. This study focuses on the characterization of banana peels to yield banana peels vinegar (BPV), tar and biochar as value added products that can be useful to farmers. Dried banana peels were characterized via proximate, ultimate, lignocellulosic, thermogravimetric (TG), and calorific value analyses. The obtained results showed that the volatile matter and fixed carbon contents were 88.02% and 2.70% while carbon, nitrogen and sulphur were 35.65%, 1.94% and 20.75 ppm respectively. The hemicellulose, cellulose and lignin contents were 41.38%, 9.90% and 8.90% while the higher and lower heating values were 16.15 MJ/kg and 14.80 MJ/kg. The maximum devolatilization rate in the banana peel biomass occurred in the temperatures range of 450–550oC which was taken as the slow pyrolysis regime temperature. The high levels of fixed carbon, volatile matter and ash contents were strong indicators that banana wastes are adequate feedstock for pyrolysis work to yield bio-infrastructure products. Similarly, the lignin, cellulose and hemicellulose fractions had significant correlation between the biomass heating values and the eventual chemical compounds present BPV and biochar. The characterization properties of the banana peels are akin to the leaves and pseudostem and thus are suitable for pyrolysis process.

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Section: Characterization Of Banana Wastes Biomassessupporting

confidence: 85%

Characterization of Banana Peels Wastes as Potential Slow Pyrolysis Feedstock

Kabenge¹,

Omulo²,

Banadda³

et al. 2018

JSD

108

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“…The pine sample was obtained [20,21] and sub-bituminous coal [22][23][24][25] is satisfactory. The presence of sulfur, oxygen and nitrogen in PMMA is attributed to the use of polymerization agents (persulfate salts, peroxides or azo compounds) [26,27].…”

Section: Materials Preparation and Characterizationmentioning

confidence: 95%

“…Table S3 contains the details of the procedure used to obtain the values shown in Table 4. The reaction enthalpy of process initiation was determined by taking a simple average of calculated enthalpies; only in the case of pine was the enthalpy of reaction calculated based on a combination of individual enthalpies for hemicelluloses, cellulose and lignin based on their mass ratios within the original biomass [20], resulting in a weighted average reaction enthalpy of 321 kJ/mol.…”

Section: Structure-reactivity Relationshipmentioning

confidence: 99%

Structure-reactivity relationship in pyrolysis of plastics: A comparison with natural polymers

Larraín

Carrier

Radović

2017

Journal of Analytical and Applied Pyrolysis

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Highlights• Global activation energy depends on conversion in pyrolysis of all polymers.• Activation energy variability is proportional to chemical complexity of polymers.• An Evans-Polanyi relationship for initiation reactions of polymer pyrolysis is proposed. AbstractRecent advances in plastics recycling confirm the high potential of pyrolysis technologies to enhance recovery and selectivity rates. Modelling the kinetics of this complex process to stimulate scaling-up opportunities remains a major challenge.This study is an attempt to develop practical quantitative reactivity indices for the pyrolysis of natural and synthetic polymers. Representative samples from both categories (coal and pine vs. PET, PE and PMMA) were selected. Their weight loss during pyrolysis was determined experimentally and analyzed using judicious lumping procedures for its initiation, propagation and termination steps. The combined experimental and theoretical approach allowed us to determine apparent activation energies using the isoconversional Friedman method; and the use of Benson's group contribution method generated reaction enthalpies for the initiation reactions. Increasing activation energies with conversion in each case indicated that bond scission proceeds in order of increasing bond strength. The greater chemical complexity of natural polymers was reflected in the higher coefficients of variability for activation energy and wider ranges of reaction enthalpies. A structure-reactivity relationship based on the Evans-Polanyi theory was used to test the hypothesis that primary pyrolysis kinetics is controlled by cleavage of weakest chemical bonds. While the results show that this approach is promising, especially if confirmed by extension to a larger data set, they also suggest the need to compare the relative kinetic importance of initiation and propagation steps in the sequence of polymer pyrolysis reactions.

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“…(1)-(3) [28]. However, bio-oil yield was taken as the total liquid products (vinegar and tar) collected from the initial biomass feed content [29]. The vinegar and tar compounds were characterized via gas chromatography (GC) and physicochemical properties analyses while for biochar the calorific values were examined [30].…”

Section: Methodsmentioning

confidence: 99%

“…Where: M 0 = weight of biomass feed, M 1 = Weight of empty measuring cylinder, M 2 = Weight of measuring cylinder with vinegar, M 3 = Weight of measuring cylinder with tar, M R0 = weight of empty reactor, and M R1 = Weight of reactor with biochar while the non-condensable gas (NCG) yields were determined from the difference [29].…”

Section: Methodsmentioning

confidence: 99%

Optimizing slow pyrolysis of banana peels wastes using response surface methodology

Omulo

Banadda

Kabenge

et al. 2018

Environmental Engineering Research

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Renewable energy from biomass and biodegradable wastes can significantly supplement the global energy demand if properly harnessed. Pyrolysis is the most profound modern technique that has proved effective and efficient in the energy conversion of biomass to yield various products like bio-oil, biochar, and syngas. This study focuses on optimization of slow pyrolysis of banana peels waste to yield banana peels vinegar, tar and biochar as bio-infrastructure products. Response surface methodology using central composite design was used to determine the optimum conditions for the banana wastes using a batch reactor pyrolysis system. Three factors namely heating temperature (350-550 o C), sample mass (200-800 g) and residence time (45-90 min) were varied with a total of 20 individual experiments. The optimal conditions for wood vinegar yield (48.01%) were 362.6 o C, 989.9 g and 104.2 min for peels and biochar yield (30.10%) were 585.9 o C, 989.9 g and 104.2 min. The slow pyrolysis showed significant energy conversion efficiencies of about 90% at p-value ≤ 0.05. These research findings are of primary importance to Uganda considering the abundant banana wastes amounting to 17.5 million tonnes generated annually, thus using them as pyrolysis feedstock can boost the country's energy status.

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Fast pyrolysis of lignin-coated radiata pine

Cited by 17 publications

References 45 publications

Characterization of Banana Peels Wastes as Potential Slow Pyrolysis Feedstock

Characterization of Banana Peels Wastes as Potential Slow Pyrolysis Feedstock

Structure-reactivity relationship in pyrolysis of plastics: A comparison with natural polymers

Optimizing slow pyrolysis of banana peels wastes using response surface methodology

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