Arrhenius parameters determination in non-isothermal conditions for the uncatalyzed gasification of carbon by carbon dioxide

Liu, Zhongsuo; Wang, Qi; Zong-shu, Zou; Tan, Guang-Lei

doi:10.1016/j.tca.2010.08.014

Cited by 28 publications

(15 citation statements)

References 34 publications

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“…The 3‐DAEM limits the stage of gasification to within a narrow interval of activation energy (σ E3 < 12 kJ/mole), meaning that the energy required for gasification of the newly generated char also occurs within a narrow range. The value of E 1 is larger than the calculated value of Liu et al, which can be attributed to the influence exerted by the amount of available active carbon sites in the experimental samples.…”

Section: Resultscontrasting

confidence: 67%

Triple‐Gaussian distributed activation energy model for the thermal degradation of coal and coal chars under a CO₂ atmosphere

Wang

2020

Asia-Pacific J Chem Eng

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Coal and coal char thermal degradation in a CO 2 atmosphere is particularly important to understand and model as a rate-determining step in the gasification process. The work presented here aims to provide a global kinetic model that accurately represents the thermal degradation of Sanxing (SX) coal and coal char under a CO 2 atmosphere and to determine the kinetic parameters of the thermal degradation. In the work presented, a novel approach has been used that involves a triple-Gaussian DAEM that simultaneously considers the primary pyrolysis, secondary pyrolysis, and the process of newly generated char gasified by CO 2 . The result of the model shows accurate reproduction of the thermal degradation behavior of SX coal and chars and provides significant information about the relative occurrence of the three steps. For SX coal and Char500, the residual error of the triple-Gaussian DAEM is approximately 0.35 to 0.22 times that of the double Gaussian DAEM. For Char850, the ratio is lower, approximately 0.12 times that of the double Gaussian DAEM. This indicates that the triple-Gaussian DAEM is more suitable for describing the thermal degradation of chars acquired at high temperatures (500-850 C) under a CO 2 atmosphere. K E Y W O R D Scoal char, thermal degradation

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Section: Resultscontrasting

confidence: 67%

Triple‐Gaussian distributed activation energy model for the thermal degradation of coal and coal chars under a CO₂ atmosphere

Wang

2020

Asia-Pacific J Chem Eng

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“…The logarithm of pre-exponential factor (A) has a strong relationship with the change in activation energy (E) by means of any circumstances. It can be represented by a linear expression ln A = aE + b , where the constant a is the slope and the constant b is the intercept and the relation between E and A is well known in the literature as "kinetic compensation effect" [36][37][38]. According to this relationship, a well-distinguished straight line should be resulted by plotting the logarithmic value of the pre-exponential factor against the activation energy.…”

Section: Thermal Degradation Kinetics Of Plapmentioning

confidence: 99%

Microrecycling of the metal–polymer-laminated packaging materials via thermal disengagement technology

2019

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Polymer-laminated metals are widely used in the packaging industries due to their flexibility of applications, superior properties, and relatively lower cost. Despite the advantages accomplished by the polymer-metal multilayer packaging materials, the recycling is a very difficult task due to the complexities of multimaterial intrinsic behaviors during the processing of cast-off materials. This study represents an innovative and sustainable way of recycling polymerlaminated aluminum packaging (PLAP) materials (postconsumer food packaging) into high-quality aluminum and a potential source of high-energy hydrocarbon gases and particulate carbon coproducts. Both sides of the aluminum foil of the packaging were laminated by two different polymers (polyethylene terephthalate, and polypropylene). Volatiles from the PLAP materials were eliminated by the thermal disengagement technology at 400-650 °C (5-30 min) with and without an inert gas supply. The volatiles evaporated from the PLAP materials were about 32%, and the rest 68% were aluminum (~ 65%) and carbon (~ 3%) from the decomposition of the polymers. The oxidation behavior of the surface of the recycled aluminum was studied by XRD, XPS, and elementary mapping, and a nanoscale oxidized surface was found in both inert and air atmospheric TD. The purity of the aluminum was measured above 98% by two different methods (LIBS and ICP-MS). The gaseous products released in TD were detected as high energy-carrying hydrocarbon, CO 2 , CO, H 2 , H 2 O, and few other gases observed by real-time monitoring. The clean gases released in TD might be utilized upon reforming into CH 4 or H 2 by further processing or as it turns out might be utilized as a source of heat energy for other applications. Carbon found from the decomposition of the hydrocarbons can be another useful element of this study. This recycling process offers an economically and environmentally feasible recycling strategy for a complex multilayer polymer-metal packaging waste.

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“…Under non-isothermal conditions, the heating rate ␤ ( • C min −1 ) is given by ␤=dT/dt, t (s) being the time [35]. Combining Eqs.…”

Section: Kinetic Modelingmentioning

confidence: 99%

“…Straight lines are obtained in which the angular coefficient (E˛/R) gives the apparent activation energy. The calculation of the pre-exponential factor Arrhenius (A) was performed assuming a reaction model of the Mampel [33], according to the solid-state kinetics recommended in the literature [33][34][35]. When the mass loss curves were overlapping, they were deconvoluted using Origin 9.2 software and a Lorentz distribution model to represent isolated phenomena.…”

Section: Kinetic Modelingmentioning

confidence: 99%

Mo influence on the kinetics of jatropha oil cracking over Mo/HZSM-5 catalysts

et al. 2017

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Arrhenius parameters determination in non-isothermal conditions for the uncatalyzed gasification of carbon by carbon dioxide

Cited by 28 publications

References 34 publications

Triple‐Gaussian distributed activation energy model for the thermal degradation of coal and coal chars under a CO₂ atmosphere

Triple‐Gaussian distributed activation energy model for the thermal degradation of coal and coal chars under a CO₂ atmosphere

Microrecycling of the metal–polymer-laminated packaging materials via thermal disengagement technology

Mo influence on the kinetics of jatropha oil cracking over Mo/HZSM-5 catalysts

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Arrhenius parameters determination in non-isothermal conditions for the uncatalyzed gasification of carbon by carbon dioxide

Cited by 28 publications

References 34 publications

Triple‐Gaussian distributed activation energy model for the thermal degradation of coal and coal chars under a CO2 atmosphere

Triple‐Gaussian distributed activation energy model for the thermal degradation of coal and coal chars under a CO2 atmosphere

Microrecycling of the metal–polymer-laminated packaging materials via thermal disengagement technology

Mo influence on the kinetics of jatropha oil cracking over Mo/HZSM-5 catalysts

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Triple‐Gaussian distributed activation energy model for the thermal degradation of coal and coal chars under a CO₂ atmosphere

Triple‐Gaussian distributed activation energy model for the thermal degradation of coal and coal chars under a CO₂ atmosphere