Thermogravimetric characteristics and kinetic of plastic and biomass blends co-pyrolysis

Zhou, Limin; Wang, Yiping; Huang, Qunwu; Cai, Jiwen

doi:10.1016/j.fuproc.2006.07.002

Cited by 303 publications

(136 citation statements)

References 18 publications

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“…Though pyrolysis of individual polymers has attracted much attention, studies on pyrolysis behavior, particularly of mixed plastics, are rather scarce. Still, from the study reported by Chattopadhyay et al (2008), it can be deduced that the mixture of HDPE, PP and PET starts decomposing at about 250°C against 477°C for pure HDPE (Zhou et al 2006). The decompositions of these two plastic samples end at 521°C and 700°C, respectively.…”

Section: Tga and Dtg Analysis Of The Waste Hdpe Samplementioning

confidence: 94%

Recovery of hydrocarbon liquid from waste high density polyethylene by thermal pyrolysis

Kumar

Singh

2011

Braz. J. Chem. Eng.

249

117

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-Thermal degradation of waste plastics in an inert atmosphere has been regarded as a productive method, because this process can convert waste plastics into hydrocarbons that can be used either as fuels or as a source of chemicals. In this work, waste high-density polyethylene (HDPE) plastic was chosen as the material for pyrolysis. A simple pyrolysis reactor system has been used to pyrolyse waste HDPE with the objective of optimizing the liquid product yield at a temperature range of 400ºC to 550ºC. Results of pyrolysis experiments showed that, at a temperature of 450ºC and below, the major product of the pyrolysis was oily liquid which became a viscous liquid or waxy solid at temperatures above 475ºC. The yield of the liquid fraction obtained increased with the residence time for waste HDPE. The liquid fractions obtained were analyzed for composition using FTIR and GC-MS. The physical properties of the pyrolytic oil show the presence of a mixture of different fuel fractions such as gasoline, kerosene and diesel in the oil.

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Section: Tga and Dtg Analysis Of The Waste Hdpe Samplementioning

confidence: 94%

Recovery of hydrocarbon liquid from waste high density polyethylene by thermal pyrolysis

Kumar

Singh

2011

Braz. J. Chem. Eng.

249

117

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“…All experiments were performed under an Argon atmosphere with a flow rate of 100 ml/min to avoid oxidation of char or evolved volatiles. Based on preliminarily experiments, the following experimental conditions were chosen to minimize the interference of heat and mass transfer [19]. Small amount of sample, 20 mg; shallow crucible height, 3 mm; and high flow rate, 100 ml/min.…”

Section: Devolatilization Experimentsmentioning

confidence: 99%

Alternative Reducing Agents in Metallurgical Processes: Devolatilization of Shredder Residue Materials

Lotfian

Ahmed

Samuelsson

2016

J. Sustain. Metall.

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Plastic-containing shredder residue material has the potential to be used as an alternative reducing agent in nonferrous bath smelting processes. This would lead to not only decreased dependency on primary sources such as coal or coke but also to an increase in the efficiency of utilization of secondary sources. This calls for systematic scientific investigations, wherein these secondary sources are compared with primary sources with respect to devolatilization characteristics, combustion characteristics, reactivity, etc. As a first step, in this paper, devolatilization characteristics of plastic-containing shredder residue material (SRM) are compared to those of coal using thermogravimetric analysis. Proximate analysis has shown that SRM mainly decomposes by release of volatiles, while coal shows high fixed carbon content, which is reported to contribute to reduction reactions. To study the reduction potential of the evolved materials, composition of evolved off-gas was continuously monitored using quadrupole mass spectroscopy. The composition of volatiles shows H 2 , CO, and hydrocarbons which are known to have reduction potential. Therefore, it is essential that SRM would be used in a process that could utilize the evolved volatiles for reduction. Furthermore, to understand the potentials of different plastic materials as reducing agents, the devolatilization mechanisms and volatile composition of three common plastics, namely, polyethylene, polyurethane, and polyvinylchloride and their mixtures have been studied. The results show the interaction between the plastics within the binary and ternary mixtures. Similar phenomena may occur during devolatilization of SRM, which contains different type of plastics.

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“…Several authors have observed interactions between the components of coal and biomass blends [10,37], while others have reported additive behaviour [38][39][40][41][42][43]. Table 3 shows the kinetic parameters (E, k 0 and ψ) determined from the data obtained at the three heating rates (5, 10 and 15 K min -1 ) for all the char samples together with the coefficients of determination, R 2 , for each model and char sample.…”

Section: Interactions Between the Components Of The Blendsmentioning

confidence: 99%

Kinetic models comparison for non-isothermal steam gasification of coal–biomass blend chars

Fermoso

Gil

Pevida

et al. 2010

Chemical Engineering Journal

121

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The non-isothermal thermogravimetric method (TGA) was applied to a bituminous coal (PT), two types of biomass, chestnut residues (CH) and olive stones (OS), and coalbiomass blends in order to investigate their thermal reactivity under steam. Fuel chars were obtained by pyrolysis in a fixed-bed reactor at a final temperature of 1373 K for 30 min. The gasification tests were carried out by thermogravimetric analysis from room temperature to 1373 K at heating rates of 5, 10 and 15 K min -1 . After blending, no significant interactions were detected between PT and CH during co-gasification, whereas deviations from the additive behaviour were observed in the PT-OS blend.However, for the two coal-biomass blends, the gasification behaviour resembled that of the individual coal, as this component constituted the larger proportion of the blend. The temperature-programmed reaction (TPR) technique was employed at three different heating rates to analyze noncatalytic gas-solid reactions. Three nth-order representative gas-solid models, the volumetric model (VM), the grain model (GM) and the random pore model (RPM) were applied in order to describe the reactive behaviour of the chars during steam gasification. From these models, the kinetic parameters were determined.The best model for describing the reactivity of the PT, PT-CH and PT-OS samples was the RPM model. VM was the model that best fitted the CH sample, whereas none of the models was suitable for the OS sample.

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Thermogravimetric characteristics and kinetic of plastic and biomass blends co-pyrolysis

Cited by 303 publications

References 18 publications

Recovery of hydrocarbon liquid from waste high density polyethylene by thermal pyrolysis

Recovery of hydrocarbon liquid from waste high density polyethylene by thermal pyrolysis

Alternative Reducing Agents in Metallurgical Processes: Devolatilization of Shredder Residue Materials

Kinetic models comparison for non-isothermal steam gasification of coal–biomass blend chars

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