Determination of kinetic triplet of the synthesized Ni3(PO4)2·8H2O by non-isothermal and isothermal kinetic methods

Kullyakool, Saifon; Danvirutai, Chanaiporn; Siriwong, Khatcharin; Noisong, Pittayagorn

doi:10.1007/s10973-013-3399-2

Cited by 40 publications

(17 citation statements)

References 42 publications

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“…12. As can be seen in Table 4, the slope and the correlation coefficient of liner regression are very near to -1 and 1, respectively, indicating the reliability of the g(α) function [36,52]. For combustion and gasification conditions, distinguishing g(α) functions were determined for each stage and even at the same stage, g(α)…”

Section: Influence Of Thermal Treatment On Decomposition Of P Vittatamentioning

confidence: 88%

“…functions differ significantly when different thermal treatments were applied. Furthermore, due to the approximate solution applied in KAS equation is more accurate than that applied in Ozawa equation [52], the values of pre-exponential factor can be estimated according to determined g(α) functions and the slopes of plots of KAS equation. The computational results of pre-exponential factor, as well as the average values of activation energy for each stage under combustion and gasification conditions, are tabulated in Table 5.…”

Section: Influence Of Thermal Treatment On Decomposition Of P Vittatamentioning

confidence: 99%

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Experimental and kinetic study of thermal decomposition behaviour of phytoremediation derived Pteris vittata

Duan

Chen

Jiang

et al. 2016

J Therm Anal Calorim

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Combustion and gasification for biomass to energy conversion is often suggested for the management of residual P. vittata from phytoremediation. In this study, the thermal behaviour of P. vittata was studied on a thermogravimetric analyser (TG), and the kinetic triplet of biomass sample was further determined for different stages of the thermochemical processes using the Ozawa and KAS methods, subsequently modified by an iterative procedure. Results show that thermal decomposition under combustion condition was complete at a lower temperature of ~500°C compared to ~700 °C for gasification, indicating the both easily complete conversion of P. vittata by combustion and gasification. Kinetic study shows that although activation energy for each stage under combustion condition is mostly larger than that under gasification, yet the reaction rate of thermal decomposition of P. vittata under combustion condition is still great larger than that under gasification condition. These findings strongly suggest that thermochemical processes offer suitable methods for the volume reduction and energy production of P. vittata.

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Section: Influence Of Thermal Treatment On Decomposition Of P Vittatamentioning

confidence: 88%

Section: Influence Of Thermal Treatment On Decomposition Of P Vittatamentioning

confidence: 99%

Experimental and kinetic study of thermal decomposition behaviour of phytoremediation derived Pteris vittata

Duan

Chen

Jiang

et al. 2016

J Therm Anal Calorim

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“…The activity of our electrodes (either GC OX-AL or GC OX-AC ) expressed in mA cm -2 were compared with those in literatures at similar conditions. It was found that it is higher than Ni(OH) 2 -Zeolite/CPE [53], Ni(OH) 2 -chitosan/GC [54], GO-NiO/GC [55], NiO x /GC [6], Cu-ZnO/GC [56] and it was found to be closer to CuO x /Cu [57], NiO x -MWCNT/GC [58] and Cu-NPS/GC [59]. In the other the activity of the electrode in this work was found to be lower in performance than Ni-NPS/ GC [60] and NiO x (sol-gel)/GC [26].…”

Section: Electrocatalytic Activitymentioning

confidence: 99%

Anodic Pretreatment of Glassy Carbon: Impacts on Structural and Electrochemical Characteristics of Niox Nanoparticles

Saleh¹

2017

IJBSBE

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Usually, glassy carbon electrode (GC) is used as it is as a substrate for electrochemically deposited nickel or nickel oxide (NiO x ) nanoparticles. In the present study, GC carbon is anodically oxidized in different media prior to electrode position of NiO x and the impacts of this pretreatment on the structural and electrochemical characteristics of NiO x are studied. Upon anodic pretreatment of GC electrode in acid (0.1 M H 2 SO 4 , GC OX-AC ) and in alkali (0.1 M NaOH, GC OX-AL ), the structural and electrochemical characterizations of nickel oxide (NiO x ) nanoparticles are highly modified. Cyclic voltammetry (CV), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) are used for characterization of the electrodes. While NiOx nanoparticles deposited on GC OX-AC reveal a bird-like shape, it shows semi-spherical shape when it is deposited on either GC or GC OX-AL , with smaller size on the GC OX-AL . The reversibility of the Ni(OH) 2

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“…The iso-conversional method is considered to give accurate values of the apparent activation energy [11]. In fact, the iso-conversional method is a ''model-free'' method [8,10,12]. The method is based on the realization that the apparent activation energy (E a ) indeed depends on the extent of conversion, but they are always the same for the particular conversion degree (a) being independent of the linear heating rate b used [13].…”

Section: Kineticsmentioning

confidence: 99%

Thermal analysis kinetics of thermal decomposition of nickel–viscose composite fiber

Guo

et al. 2014

J Therm Anal Calorim

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In this study, the thermal decompositions of nickel composite fibers (NCF) under different atmospheres of flowing nitrogen and air were investigated by XRD, SEM-EDS, and TG-DTG techniques. Non-isothermal studies indicated that only one mass loss stage occurred over the temperature regions of 298-1,073 K in nitrogen. The mass loss was from the decomposition. But after this decomposition, nickel was oxidized in air, when the temperature was high enough. In nitrogen media, the modelfree kinetic analysis method was applied to calculate the apparent activation energy (E a ) and pre-exponential factor (A). The method combining Satava-Š esták equation with one TG curve was used to select the suitable mechanism functions from 30 typical kinetic models. Furthermore, the Coats-Redfern method was used to study the NCF decomposition kinetics. The study results showed that the decomposition of NCF in nitrogen media was controlled by three-dimension diffusion; mechanism function was the anti-Jander equation, the apparent activation energy (E a ) and the pre-exponential factor (A) were 172.3 kJ mol -1 and 2.16 9 10 9 s -1 , respectively. The kinetic equation could be expressed as following: da dT ¼ 2:16 Â 10 9 b exp À20724:1 T 3 2 ð1 þ aÞ 2=3 ½ð1 þ aÞ 1=3 À 1 À1

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Determination of kinetic triplet of the synthesized Ni3(PO4)2·8H2O by non-isothermal and isothermal kinetic methods

Cited by 40 publications

References 42 publications

Experimental and kinetic study of thermal decomposition behaviour of phytoremediation derived Pteris vittata

Experimental and kinetic study of thermal decomposition behaviour of phytoremediation derived Pteris vittata

Anodic Pretreatment of Glassy Carbon: Impacts on Structural and Electrochemical Characteristics of Niox Nanoparticles

Thermal analysis kinetics of thermal decomposition of nickel–viscose composite fiber

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