Co-pyrolysis of bamboo sawdust and plastic: Synergistic effects and kinetics

Alam, Mahboob; Bhavanam, Anjireddy; Jana, Ashirbad; Viroja, Jaimin kumar S.; Peela, Nageswara Rao

doi:10.1016/j.renene.2019.10.103

Cited by 131 publications

(33 citation statements)

References 85 publications

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“…29 The Kissinger-Akahira-Sunose (KAS) and Flylnn-Wall-Ozawa (FWO) approaches are also widely used to study the thermal behaviour of polymers. 28,31,37,40,41 Lumping approach is another kinetic model for the estimation of cracking reaction of waste plastic. Schubert et al demonstrated that lumps model offered a useful information about the process reactions.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the diversity and complexity of these wastes, the authors suggested that DAEM could be the appropriate and accurate method to describe the complexity of waste pyrolysis process 29 . The Kissinger‐Akahira‐Sunose (KAS) and Flylnn‐Wall‐Ozawa (FWO) approaches are also widely used to study the thermal behaviour of polymers 28,31,37,40,41 . Lumping approach is another kinetic model for the estimation of cracking reaction of waste plastic.…”

Section: Introductionmentioning

confidence: 99%

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Thermo‐catalytic pyrolysis of wastes using bimetal‐modified ZSM ‐5 catalyst: investigation of the reaction kinetic parameters

et al. 2021

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The decomposition of waste polymers and the main reaction kinetic parameters of the pyrolysis have been discussed based on thermogravimetric analysis (TGA) using Me/Ni/ZSM-5 catalysts (Me = Ca, Ce, La, Mg, Mn). Mainly, the effect of the raw materials (polyolefin, polyethylene terephthalate) and catalyst presence to the weight loss were investigated. The tested catalysts can effectively reduce the activation energies of the waste pyrolysis. However, different tendencies were found in case of different raw materials. Based on results, the La/Ni/ZSM-5 catalyst was further investigated using raw material: catalyst ratio of 2:1, 1:1, 1:2 and 1:3 by both TG instrument and tubular furnace reactor at 500 C and 900 C. Mainly, the gas composition and the syngas yield were investigated. The lowest activation energy and the highest yield of the syngas (92.3 mmol/g raw material using pyrolysis-reforming 900 C) were found in case of raw material:catalyst ratio of 2:1.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermo‐catalytic pyrolysis of wastes using bimetal‐modified ZSM ‐5 catalyst: investigation of the reaction kinetic parameters

et al. 2021

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“…On the other hand, the agglomeration occurred in the pyrolysis of plastics alone can be alleviated by biomass particles during the co-pyrolysis process [9]. In addition, positive synergistic effects are observed compared to separate pyrolysis of the two feedstocks in terms of increased aromatics yield [10]. The oxygenated intermediates such as furans, aldehydes and phenols derived from biomass abstract hydrogen from alkanes and olefins derived from plastics, yielding the high value-added aromatics followed by dehydration through Diels-Alder reaction and hydrogen transfer as shown in Figure 1 [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, positive synergistic effects are observed compared to separate pyrolysis of the two feedstocks in terms of increased aromatics yield [10]. The oxygenated intermediates such as furans, aldehydes and phenols derived from biomass abstract hydrogen from alkanes and olefins derived from plastics, yielding the high value-added aromatics followed by dehydration through Diels-Alder reaction and hydrogen transfer as shown in Figure 1 [10][11][12][13]. For the most technologies described in literatures, the biomass and plastic materials are mechanically mixed to the co-conversion reaction [5][6][7][8][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…The oxygenated intermediates such as furans, aldehydes and phenols derived from biomass abstract hydrogen from alkanes and olefins derived from plastics, yielding the high value-added aromatics followed by dehydration through Diels-Alder reaction and hydrogen transfer as shown in Figure 1 [10][11][12][13]. For the most technologies described in literatures, the biomass and plastic materials are mechanically mixed to the co-conversion reaction [5][6][7][8][10][11][12][13]. However, there are significant differences between the two components in particle size, density, hardness, shape, heating state and so on.…”

Section: Introductionmentioning

confidence: 99%

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Composite Pyrolysis of Biomass and Plastic for High-quality Fuel Oil over HZSM-5

Yu¹

2021

AJCHE

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Catalytic co-pyrolysis of biomass and plastic is a promising technology to their resource recovery and energy conversion. For the traditional technologies, the two feedstocks are mechanically mixed (MM) to the co-conversion reaction. However, there are disadvantages in the MM mode process, such as mixing nonuniformity and inconvenient transportation of feedstocks, poor heat and mass transfer during pyrolysis and low yield of effective products. To solve the above issues, a composite pyrolysis of biomass and plastic for high-quality fuel oil was innovatively studied in this paper at a lab-scale fixed bed reactor using HZSM-5 as a catalyst. Through procedures including mechanical mixing, hot pressing and crushing granulation, a composite molding (CM) sample was prepared. Then the optimal conditions for fuel oil production of the CM sample were explored, and under which conditions products distribution were compared with pyrolysis from the common MM sample. And possible mechanism for high-quality fuel oil generation of the composite pyrolysis was put forward through characterization of sample properties. Results show that, under the optimal reaction conditions of the composite pyrolysis, the yield of fuel oil was increased by 34.8% and the yield of aromatics was increased by 50.7% compared with the conventional pyrolysis from MM sample. Advantages of the composite pyrolysis could be explained by the enhanced contact between biomass and plastic particles, which promoted a stronger synergy between the two derived intermediates and effectively improved mass and heat transfer during pyrolysis process.

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