Combustion behavior of different kinds of torrefied biomass and their blends with lignite

Toptas, Aslı; Yıldırım, Yeliz; Duman, Gözde; Yanık, Jale

doi:10.1016/j.biortech.2014.11.072

Cited by 168 publications

(83 citation statements)

References 35 publications

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“…Several studies showed that compared with clean and pulverized coal, higher calorific value and similar combustion properties of biochar could be obtained through optimizing the pyrolysis process and increasing the specific surface area by reducing particle size, respectively (Wijayanta et al 2014;Jiang et al 2018). Increasing evidence from studies on mixed combustion of biochar and coal revealed that biochar could effectively reduce the ignition and burnout temperatures of fuel mixtures and improve their conversion efficiency and combustion characteristics (Mi 2018;Wang et al 2018;Toptas et al 2015). This demonstrated that biochar could be used for co-combustion of fire coal for large boilers in the future.…”

Section: Carbonized Bio-coalmentioning

confidence: 99%

Past, present, and future of biochar

Chen

Meng

Han

et al. 2019

Biochar

339

141

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After entering the twenty-first century, biochar has become a focal point of multidisciplinary research because of its special characteristics, broad application, and promising development prospects. Basic and applied research on the application of biochar in the areas of agriculture, environment, and energy have increased dramatically in the face of food security, environmental pollution, and energy shortage. Although there are some disputes about biochar research, many studies have demonstrated the importance of biochar research from the perspective of scientific advancement and practical application. This paper briefly recalls the history of biochar application; introduces research progress on the basic characteristics of biochar and its associated production technologies; summarizes the research status and existing problems of biochar application in the areas of agriculture, environment, and energy; and analyzes the potential problems and development trends of biochar research in the future.

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Section: Carbonized Bio-coalmentioning

confidence: 99%

Past, present, and future of biochar

Chen

Meng

Han

et al. 2019

Biochar

339

141

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“…Solid fuel which is called as torrefied biomass is obtained as a result of this thermal process. Today, torrefied biomass is used as intermediate product for other thermal processes or an alternative fuel to lignite . It is indicated that torrefaction is one of the extensive pretreatments for pyrolysis or gasification of biomass, especially .…”

Section: Introductionmentioning

confidence: 99%

“…Today, torrefied biomass is used as intermediate product for other thermal processes or an alternative fuel to lignite. 1,3,4 It is indicated that torrefaction is one of the extensive pretreatments for pyrolysis or gasification of biomass, especially. 5 Torrefaction products could be investigated for upgrading the biomass pyrolysis products.…”

Section: Introductionmentioning

confidence: 99%

Upgrading lignocellulosic waste to fuel by torrefaction: Characterisation and process optimization by response surface methodology

Kutlu

Koçar

2018

Int J Energy Res

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Summary Torrefied biomass is a commercial fuel, which is particularly produced from woody biomass via torrefaction and alternative to coal to reduce greenhouse gas emissions in the short term. In this study, torrefaction conditions of cotton stalk were optimised, and the effect of bulk density together with temperature and residence time on process yields and characterisation of torrefied cotton stalk was investigated. Response surface methodology using Box‐Behnken design was employed for the design of experiments and optimization. Cotton stalk was torrefied at a temperature between 260°C and 320°C, in 10, 35, and 60 minutes with bulk density of 125, 150, and 175 kgm−3. Temperature was the most effective parameter for the six responses (higher heating value, carbon content, hydrogen/carbon and oxygen/carbon ratios, mass loss, and energy yield). Besides, temperature/bulk density interaction was found to be significant for all responses whereas residence time/bulk density interaction was effective for process yields. The optimization results showed that more economical torrefied biomass with similar quality of lignite could also be produced under process conditions of 305°C‐32 minutes‐158 kgm−3. At this point, higher heating value and carbon content of product were calculated as 19.7 MJ kg−1 and 64%, respectively.

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“…Furthermore, torrefaction greatly enhances the grindability of treated biomass. These biomass fuels are characterized by a higher fixed carbon and lower volatile fractions in comparison with non-thermally treated biomass [9].…”

Section: Introductionmentioning

confidence: 99%

Furniture wood waste as a potential renewable energy source

Plis

Kotyczka-Morańska

Kopczyński

et al. 2016

J Therm Anal Calorim

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In this study, the combustion behavior of raw waste wood from furniture and samples torrefied at temperatures of 473, 513, 553 and 593 K was investigated. TG-DTG analysis showed that the mass loss in the first stage of the process decreased with the temperature of torrefaction, whereas the temperature in the second stage increased. The influence of torrefaction and combustion parameters on greenhouse gas emissions were investigated by the FTIR technique. The characteristic combustion parameters were also determined. The ignition temperatures for the furniture wood waste and samples torrefied at 473, 513 and 553 K from 549 to 559 K, whereas that of the sample torrefied at 593 K was significantly higher (600 K). All samples were completely burnt at 813-843 K, after 29-35 min, depending on the torrefaction temperature. Kinetic parameters are determined using a two-step firstorder reaction. The activation energy value for the first stage increased with the increasing temperature of torrefaction, from 68 to 125 kJ mol -1 , whereas the temperature in the second stage decreased from 108 to 47 kJ mol -1 . A similar correlation was observed for the pre-exponential value A. In the case of the torrefied furniture wood waste at 593 K, the combustion process runs as a single first-order reaction. The calculated data were fitted to the experimental data very accurately (R 2 [ 0.9992 and standard deviation \6.7 %), and the kinetic model was correctly founded. The linear relationship between logA and E a provides a way to predict the kinetic parameters of the combustion process. Keywords

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Combustion behavior of different kinds of torrefied biomass and their blends with lignite

Cited by 168 publications

References 35 publications

Past, present, and future of biochar

Past, present, and future of biochar

Upgrading lignocellulosic waste to fuel by torrefaction: Characterisation and process optimization by response surface methodology

Furniture wood waste as a potential renewable energy source

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