Studies on combustion behaviours of single biomass particles using a visualization method

Shan, Liang; Kong, Ming; Bennet, Tom D.; Sarroza, Archi C.; Eastwick, Carol; Sun, Duo; Lü, Gang; Yan, Yong; Liu, Hao

doi:10.1016/j.biombioe.2017.12.008

Cited by 35 publications

(13 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The projected area then remains circular and a final, very quick, reduction of the area is observable after 90-95% burnout until the end. This has been previously observed by Levendis et al [38] and Khatami et al [6] and is described as shrinking core combustion behavior by Shan et al [39].…”

Section: Shape Change During Particle Combustionsupporting

confidence: 76%

“…Previous studies on single particle device, provided an approximation to milling requirements for biomass fuels in terms of maximum particle size for efficient burn-out [7,8]. Other single particle studies have identified the differences between different fuels behaviour during combustion [7,3,8,9], providing details on ignition [10,11,12,13], volatile flame [14], char combustion [15], particle morphology [16], combustion atmosphere [17,18] or temperature [8,18]. Flower et al [5] conducted biomass single particles studies in a wire mesh single particle setup for particles between 5 and 30 mg and showed relatively low dependency on the aspect ratio of the samples.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Shape and size transformations of biomass particles during combustion

Riaza

Mason

Jones

et al. 2020

Fuel

View full text Add to dashboard Cite

show abstract

Section: Shape Change During Particle Combustionsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Shape and size transformations of biomass particles during combustion

Riaza

Mason

Jones

et al. 2020

Fuel

View full text Add to dashboard Cite

show abstract

“…All biomass pellets in the experiment had a volatile combustion stage including feeble combustion at the beginning and bright burning. Biomass char combustion was relatively stable, and the burnout time was much longer than the volatile burnout time . It can be seen from Figure that when the oxygen concentration was greater than 50%, the flame was luminous and the length was short.…”

Section: Resultsmentioning

confidence: 97%

“…Biomass is a high‐volatile fuel, so it is of great significance to study the characteristics of volatile combustion. The combustion behavior of eucalyptus, pine, and olive residues was studied by Shan et al in a DTF. They found that the ratio of burning time of char and volatile matter increased quadratically with the corresponding mass ratio of materials.…”

Section: Resultsmentioning

confidence: 99%

An experimental study of single unconventional biomass pellets: Ignition characteristics, combustion processes, and artificial neural network modeling

Lin

Wang

et al. 2020

Int J Energy Res

View full text Add to dashboard Cite

Summary This study applied the artificial neural networks (ANNs) model to the thermal data obtained by suspension ignition and combustion experiment of single peanut shells (PS, millimeter scale) pellet under O2/CO2 atmosphere. ANN11 was the best ANN model for predicting the relevant parameters of PS combustion. The coincidence between ANN prediction data and experimental data was over 99%. Two modes of biomass pellet ignition were observed: homogeneous ignition of volatiles and hetero‐homogeneous ignition of volatiles and char simultaneously. The ignition mode was transformed from homogeneous ignition to hetero‐homogeneous ignition when oxygen concentration was 50%. In addition, it was observed that ignition at the bottom emerged first, and then the upper end was ignited, finally generating an envelope flame. This phenomenon occurred when gas flow temperature exceeded 873 K or the oxygen concentration was greater than 50%. The reduction of ignition delay time and internal ignition temperature from 21% to 50% oxygen concentration was more intense than that of 50% to 100% oxygen concentration. Increasing oxygen concentration or temperature resulted in a shorter, brighter, and more stable volatile flame of biomass pellets, which reduced volatile burnout time. Nevertheless, the impact of gas flow rate on biomass combustion was intricate and irregular.

show abstract

“…The measured CO2 cannot differentiate whether CO2/CO came from char combustion or from volatile matter combustion, Instead, it describes the total production of CO and CO2 from both the volatile matter and char combustion. This method was also used by Shan et al (2018), who investigated biomass combustion behaviour using a visualisation method. It was observed that there were two separate processes for volatile matter and char combustion for biomass and the duration of those processes is based on the fixed carbon-to-volatile matter mass ratio of the biomass (Bai et al, 2017;Shan et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

Investigation of the apparent kinetics of air and oxy-fuel biomass combustion in a spout fluidised-bed reactor

Yan

Clough

Anthony

2020

Chemical Engineering Research and Design

View full text Add to dashboard Cite

A bench-scale spouted fluidised-bed reactor was used to investigate the combustion kinetics of pulverised woody biomass under air and oxy-fuel atmospheres. Bed temperatures were in the range of 923-1073 K and O2 concentrations were varied from 20-35 vol%. The activation energies and apparent orders of reaction were calculated for air and oxy-fuel combustion by means of an n th order Arrhenius equation approach. Results indicated that the apparent order of reaction for both air and oxy-fuel combustion was approximately zero. The activation energies were calculated assuming a zero-order reaction mechanism and were averaged over all oxygen concentrations for air and oxy-fuel combustion and found to be 18.95 kJ/mol and 26.93 kJ/mol, respectively. The rate of combustion under oxy-fuel conditions was, on average, 37.5% higher compared to air combustion. The shrinking core model with a reaction-controlled step was found to accurately represent the biomass combustion reactions under both air and oxy-fuel conditions.

show abstract

Studies on combustion behaviours of single biomass particles using a visualization method

Cited by 35 publications

References 30 publications

Shape and size transformations of biomass particles during combustion

Shape and size transformations of biomass particles during combustion

An experimental study of single unconventional biomass pellets: Ignition characteristics, combustion processes, and artificial neural network modeling

Investigation of the apparent kinetics of air and oxy-fuel biomass combustion in a spout fluidised-bed reactor

Contact Info

Product

Resources

About