Relationship between structure and reactivity of carbonaceous materials

Arenillas, A.; Rubiera, F.; Pevida, C.; Ania, Conchi O.; Pís, J.J.

doi:10.1023/b:jtan.0000028038.34976.83

Cited by 43 publications

(23 citation statements)

References 20 publications

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“…Thermogravimetric analysis is frequently used to determine the kinetic parameters of carbonaceous fuels (Arenillas et al, 2004;Barkia et al, 2006;Elbeyli and Piskin, 2006). In this work, the reaction kinetics of the coal and biomass blends samples under the steam atmosphere was tested by the thermogravimetric analyzer STA 449F3 (NETZSCH Company, Germany).…”

Section: Co-gasification Testsmentioning

confidence: 99%

Kinetic models comparison for steam gasification of coal/biomass blend chars

Chen

Xiang

et al. 2014

Bioresource Technology

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Section: Co-gasification Testsmentioning

confidence: 99%

Kinetic models comparison for steam gasification of coal/biomass blend chars

Chen

Xiang

et al. 2014

Bioresource Technology

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“…Thermogravimetric analysis is a technique that is frequently used to determine the kinetic parameters of carbonaceous materials [20][21][22]. A thermobalance (Setaram TAG24) was used for the gasification tests which were conducted at atmospheric Duplicate experiments for each test were performed in order to test the reproducibility of the results.…”

Section: Gasification Testsmentioning

confidence: 99%

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

Fermoso

Gil

Pevida

et al. 2010

Chemical Engineering Journal

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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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“…The n value giving a straight line with a highest correlation coefficient was assumed to be the order of the overall pyrolysis and combustion reactions [20]. The main temperature range of volatile evolution (350-600°C) was always taken into account in the calculation and a regression factor, R 2 , was obtained in both processes [8,9,13].…”

Section: Combustion and Pyrolysis Characteristics Of Tunçblek Lignitementioning

confidence: 99%

“…Iordanidis et al [1] investigated combustion properties and burning profiles of Greece lignites and they showed good correlations between results of proximate and calorimetry analyses and DTA/TG data. Arenillas et al [9] determined by using the TG/DTA techniques that effects of coal blending on combustion characteristics. Kök et al [10] determined that thermogravimetric characterization of ten lignites and kinetic calculation for their oxidation processes.…”

Section: Introductionmentioning

confidence: 99%

Combustion and pyrolysis characteristics of tunçblek lignite

Elbeyli

Pişkin

2006

J Therm Anal Calorim

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In this study, thermal characteristics and kinetic parameters of cleaned Tunçbilek lignite were determined by using a Setaram Labsys DTA/TG/DSC thermal analysis system both for combustion and pyrolysis reactions. Experiments were performed at a heating rate of 10°C min -1 under reactive (air) and inert (nitrogen) gases up to 1000°C. Non-isothermal heating conditions were applied and reaction intervals were determined for combustion and pyrolysis reactions from obtained curves. The combustion properties were evaluation by considering the burning profile of the lignite sample. Burning temperatures and rate of combustion were determined from TG/DTG curves. Calorific value of the lignite sample was measured by DSC curve and compared with the adiabatic bomb calorimeter result.In addition to investigation of the combustion properties, pyrolysis characteristics of the lignite sample were investigated based on TG/DTG/DSC curves. Activation energy (E) and pre-exponential factor (A) were calculated from the TG data by using a Coats-Redfern kinetic model both for combustion and pyrolysis reactions of cleaned Tunçbilek lignite.

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Relationship between structure and reactivity of carbonaceous materials

Cited by 43 publications

References 20 publications

Kinetic models comparison for steam gasification of coal/biomass blend chars

Kinetic models comparison for steam gasification of coal/biomass blend chars

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

Combustion and pyrolysis characteristics of tunçblek lignite

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