Devolatilization rate of biomasses and coal–biomass blends: an experimental investigation

Biagini, Enrico; Lippi, Federica; Petarca, Luigi; Tognotti, Leonardo

doi:10.1016/s0016-2361(01)00204-6

Cited by 234 publications

(151 citation statements)

References 22 publications

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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

116

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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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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

116

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“…and mixtures, it shows that the validity of the assumptions on first-order decomposition mechanism is fitted with the experimental data [9]. Table 3 showed that the values of activation energy, E and pre-exponential factor, A increased with the addition of bio-oil into the slurry blends.…”

mentioning

confidence: 54%

An Investigation into the Combustion of Mixed Fuel Consisting of Bituminous Coal and Crude Bio-Oil

Hamdan

Shahruddin

Daud

et al. 2015

AMM

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Abstract. The combustion of bituminous coal, bio-oil, and their slurry mixtures were performed under air atmosphere using Thermogravimetric Analyzer (TGA). All samples were run from room temperature to 110°C and held for 10 minutes before the temperature was ramped at the heating rate of 10ºC/min to 1100ºC.Kinetic evaluation was conducted using a simple Arrhenius-type kinetic model with first-order decomposition reaction. Apparent activation energy, Ea, and pre-exponential factor, A, were calculated from the modelling equation. Results reveal that the reactivity of CBS fuel is higher than a single coal fuel to which the addition of bio-oil helps to increase the combustion performance of the blends. The optimum fuel ratio appears at 50:50 ratio with equal contribution of coal and bio-oil properties that contribute to the increase in volatile matter causing maximum combustion rate achievable at much lower temperature compared to single coal fuel.

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“…110°C is related to separation of analytical moisture, included in the studied sewage sludge samples. In the range of temperatures 130-210°C all the studied types of sludge demonstrated further sample mass loss that can be interpreted as loss of water chemically related to fuel (Biaggini et al, 2002). Some people emphasise that drying fuels can be slightly delayed due to high heat of water vaporisation (Yu et al, 2002).…”

Section: Sewage Sludgementioning

confidence: 95%

“…The next stage of sludge decomposition takes place in the scope of temperatures between 670 and 750°C, with maximum at 710°C. This peak is certainly the responsibility of calcium carbonate decomposition contained in the sewage sludge, added to the sludge as part of hygienisation (Biaggini et al, 2002;Collura et al, 2005). On this basis we can speak about the quantity of lime added to sediment in different treatment plants.…”

Section: Sewage Sludgementioning

confidence: 99%

Thermal Analysis of Solid Fuels in an Inert Atmosphere

Kijo-Kleczkowska

Szumera

Środa

2017

Archives of Mining Sciences

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The paper takes the analysis of thermal studies of different types of fuels. It allowed diversification of fuels depending on their composition and origin. Consideration of coal, biomass and waste (coal mule, sewage sludge) as fuel is nowadays an important aspect of energy in our country. It should be emphasized that Poland power engineering is based up to 95% on coal -the primary fuel. Mining industry, forced to deliver power engineering more and better fuel, must however, use a deeper cleaning of coal. This results in a continuous increase waste in the form of mule flotation. The best method of disposing these mule is combustion and co-combustion with other fuels. On the other hand, commonly increasing awareness state of the environment and the need to reduce CO 2 emissions energy industry have committed to implement alternative solutions in order to gain power, through, i.a.: development technologies use of biomass, which is one of the most promising renewable energy sources in Poland.The paper presents the results of research TG-DTA fuels made in an inert atmosphere.Keywords: thermal analysis, coal, biomass, coal-mule, sewage sludge W pracy przedstawiono analizę badań termograwimetrycznych różnego rodzaju paliw. Pozwoliła ona na ich zróżnicowanie w zależności od składu i pochodzenia. Rozpatrywanie, nie tylko węgla, ale rówież biomasy i odpadów (mułów węglowych, osadów ściekowych) jako paliw jest obecnie ważnym aspektem energetycznym w naszym kraju. Należy podkreślić, że polska energetyka oparta jest w ok. 95% na węglu. Przemysł wydobywczy zmuszony do dostarczania energetyce coraz lepszego węgla stosuje jego głębsze oczyszczanie. Powoduje to ciągły wzrost ilości odpadów w postaci mułów poflotacyjnych. Najlepszą metodą ich unieszkodliwiania jest spalanie oraz współspalanie z innymi paliwami. Z drugiej strony, z uwagi na aspekty środowiskowe i konieczność redukcji emisji CO 2 , przemysł energetyczny zobowiązany jest

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Devolatilization rate of biomasses and coal–biomass blends: an experimental investigation

Cited by 234 publications

References 22 publications

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

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

An Investigation into the Combustion of Mixed Fuel Consisting of Bituminous Coal and Crude Bio-Oil

Thermal Analysis of Solid Fuels in an Inert Atmosphere

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