Pyrolysis kinetics of coking coal mixed with biomass under non-isothermal and isothermal conditions

Jeong, Ha Myung; Seo, Myung Won; Jeong, Sang Mun; Na, Byung Ki; Yoon, Sang Jun; Lee, Jae Goo; Lee, Woon Jae

doi:10.1016/j.biortech.2014.01.005

Cited by 55 publications

(19 citation statements)

References 16 publications

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“…To use these methods, a series of experiments has to be conducted at different heating rates [16]. During the last decade, these methods have been frequently used to study the pyrolysis decomposition kinetics and apparent activation energy for very different materials [21][22][23][24][25][26][27]. Among these methods, the one developed by Vyazovkin [16] allows for the calculation of the activation energy from dynamic data and may be applied to both simple and complex reactions.…”

Section: Kinetic Theorymentioning

confidence: 99%

Thermogravimetric analysis of the co-pyrolysis of a bituminous coal and pulp mill sludge

Coimbra

Bermejo

Escapa

et al. 2015

J Therm Anal Calorim

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Thermal valorization of organic wastes by coprocessing with coal may be a management option for such wastes. In this work, the separate pyrolysis of coal and primary and secondary pulp mill sludge was assessed by thermogravimetric (TG) analysis. Then, under the same experimental conditions, the pyrolysis TG curves of the coal blends with a 10 mass% of either primary or secondary pulp mill sludge were obtained. The corresponding differential thermogravimetry curves made evident that the devolatilization of coal starts at higher temperature and reaches higher char yields than that of primary or secondary paper mill sludge. Under blending, lower devolatilization temperatures and char yields, close to the weighted calculated ones, are observed. Non-isothermal kinetic analysis showed that the Arrhenius activation energy (E) corresponding to the pyrolysis of coal was lower than that corresponding to either L1 or L2. Moreover, lower E than the weighted calculated ones was determined for the co-pyrolysis of the blends.

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Section: Kinetic Theorymentioning

confidence: 99%

Thermogravimetric analysis of the co-pyrolysis of a bituminous coal and pulp mill sludge

Coimbra

Bermejo

Escapa

et al. 2015

J Therm Anal Calorim

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“…Furthermore, the micro‐moleculars can easily volatilize from the pore of coal particles and react with oxidizing agent. In addition, the pore structure of the solids dried from the wastewater, which is much different from that of real coal, has a significant effect on the volatilization process . Oxygen content is higher in the solids because of the residue of oxygen‐containing hydrocarbon.…”

Section: Resultsmentioning

confidence: 99%

TG analysis and kinetic study of organic constituents in wastewater from coal‐gasification process

Zhang

Wang

et al. 2017

Asia-Pacific J Chem Eng

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In the paper, the thermal reactivity of organic constituents from coal-gasification wastewater is performed through physicochemical and thermogravimetric (TG) analysis. The effects of reaction atmosphere, oxygen concentration, heating rate, and final temperature on both solids conversion and degradation rate are experimentally studied. The results indicate that organic constituents mainly consist of aliphatic hydrocarbon, phenols, and ammonium, and so on. The thermal degradation of organic constituents in various atmospheres can be divided into four regions: 100-200, 200-300, 300-410, and 410-900°C. The TG/DTG curves present considerable differences in the last region compared with that in the first three regions. In addition, the degradation rate shows a considerable increase and moves toward higher temperature region with heating rate. Furthermore, the kinetic parameters of organic constituents are analyzed by one multi-heating rate method. The calculated results show that apparent activation energy of organic constituents varies between 82.8 and 91.3 kJ mol À1 under various reaction atmospheres. This information is potentially useful for the design and retrofitting of the large-scale equipment to recover industrial wastewater.

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“…Through thermal decomposition, syngas, which was composed of hydrogen, carbon monoxide, carbon dioxide, methane and C 2 -C 4 compounds, is evolved from this sample. The second stage for GFRP is more extended for other low grade fuels, and most of the weight loss occurs during this period [17]. In the third stage, except for ash and fixed carbon, the most volatile matter was converted to syngas, and weight fraction did not decrease sharply despite the residence time increase.…”

Section: Kinetics With Tbrmentioning

confidence: 98%

Pyrolysis characteristics of glass fiber-reinforced plastic (GFRP) under isothermal conditions

Yun

Seo

Won

et al. 2015

Journal of Analytical and Applied Pyrolysis

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Pyrolysis kinetics of coking coal mixed with biomass under non-isothermal and isothermal conditions

Cited by 55 publications

References 16 publications

Thermogravimetric analysis of the co-pyrolysis of a bituminous coal and pulp mill sludge

Thermogravimetric analysis of the co-pyrolysis of a bituminous coal and pulp mill sludge

TG analysis and kinetic study of organic constituents in wastewater from coal‐gasification process

Pyrolysis characteristics of glass fiber-reinforced plastic (GFRP) under isothermal conditions

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