Particle Morphology Analysis of Biomass Material Based on Improved Image Processing Method

Lu, Zhaolin; Hu, Xiaojuan; Lu, Yao

doi:10.1155/2017/5840690

Cited by 19 publications

(7 citation statements)

References 34 publications

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“…In this research, we focus on physical characteristics common to both EFB and kenaf. Previous research by Lu et al 20 showed that biomass particles obtained by size reduction processing using a knife mill were irregular because of structural anisotropy. This irregularity could be explained by the PSD obtained from the image analysis performed in this research (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Torrefied Empty Fruit Bunch (EFB) and Kenaf Combustion Characteristics: Comparison Study between EFB and Kenaf Based on Microstructure Analysis and Thermogravimetric Methods

et al. 2020

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To enrich biomass research, particularly for empty fruit bunch (EFB) and kenaf, this study focused on particle size and body structure thickness using a combination of reflected light petrography microscopy and image analysis. Torrefaction was chosen as a prior treatment to upgrade EFB and kenaf fuel properties, and comparisons were made between raw and torrefied samples. Combustibility characteristics were analyzed using a thermogravimetric method. From raw sample combustion characteristics, kenaf shown better combustibility than EFB, while for torrified cases, both were shown the same curve pattern as their raw materials, but with each torrefied case showing shifting phenomena from the previous conditions. These phenomena were in line with the difference in the microstructure properties of both EFB and kenaf. The results indicate that the biomass microstructure properties studied here can be observed using microscopy enhanced with image processing and analysis and that particle size and thickness can affect combustion and kinetic properties in combustion tests.

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Section: Resultsmentioning

confidence: 99%

Evaluation of Torrefied Empty Fruit Bunch (EFB) and Kenaf Combustion Characteristics: Comparison Study between EFB and Kenaf Based on Microstructure Analysis and Thermogravimetric Methods

et al. 2020

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“…The particle size distribution (PSD) analysis was performed by using a MATLAB code that is based on a sieveless segmentation technique [22][23][24]. The imaging setup is shown in Figure 2.…”

Section: Particle Size Analysismentioning

confidence: 99%

Experimental Study of Entrainment and Mixing of Renewable Active Particles in Fluidized Beds

2020

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Fluidized bed combustors were initially designed and built basically for the utilization of fossil fuels, mostly coal. The actual worldwide trend of transitioning from fossil fuels to renewables requires sufficient knowledge on the fluid mechanics of these new particle types because of the significant differences in their shapes, sizes, densities, and homogeneities. This article presents experimental results on the particle entrainment and mixing of some industrially relevant fuels such as solid refused fuel/refuse derived fuel (SRF/RDF), bark, sunflower shell, and wheat shell. The measurements were performed on a lab-scale fluidized bed experimental facility. The results show that sunflower shell is entrained in the highest degree; however, at very low velocity, the entrainment of wheat shell is the most intensive. The entrainment behaviors of the investigated SRF and bark samples are similar. On the other hand, the mixing results showed that the SRF has relatively high mass fractions in the bottom and centeral regions of the fluidized bed at low superficial velocities, while at elevated velocities, the entire mass of this fuel is shifted upwards. Interestingly, just the opposite tendency can be observed in cases of all other investigated biomass fuels. Finally, the nonspherical renewable active particles have markedly higher concentrations in the bottom region of the bed compared to spherical ones.

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“…This resulted in an overestimation of larger particles. Higher attractive forces between smaller particles due to van der Waals interactions [55] may explain the greater tendency for beech particles to form agglomerated particles during disintegration in hot water. Attempts to break up the agglomerated particles by using a sieving amplitude of 3 mm, as suggested by Jensen et al [56],…”

Section: Pellet Production and Pellet Characterizationmentioning

confidence: 99%

From wood chips to pellets to milled pellets: The mechanical processing pathway of Austrian pine and European beech

et al. 2019

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This study assesses the changes in physical properties (particle size, shape, density) of Austrian pine (softwood) and European beech (hardwood), as they are mechanically processed from wood chips to pellets and then to milled pellets. A series of semi-industrial hammer mills and a semi-industrial pellet mill were used. The specific pelletizing and grinding energy, as well as the pellet mill and hammer mill capacity, were determined. Size, shape, and bulk density of the wood particles obtained at each processing step were studied. The pellet quality was analyzed according to international standards. Results show that the pelletization modifies the internal pellet particle shape and length due to the breakage of particles across their longest dimension, leading to more circular and less elongated particles. However, the particle width was nearly unaffected, indicating a directional fracture behavior for wood particles during pelletization.The particle breaking effect was more dominant for beech particles. Beech contained a lower amount of extractives than pine that led to higher specific pelletizing energy. In addition, beech Masche et al. / Mechanical processing pathway of wood / 2 pellets had a lower quality concerning durability and density. Relationships between specific grinding energies and characteristic product particle sizes were also determined. E.g., the specific energy for grinding pine pellets was about 10 kWh/t oven-dry wood for a characteristic product size of 0.8 mm, while grinding beech pellets required about 7 kWh/t oven-dry wood for a characteristic product size of 0.6 mm. The study concludes that less energy is needed to pelletize pine than beech under the same processing conditions, but more energy is needed to mill pine than beech.

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Particle Morphology Analysis of Biomass Material Based on Improved Image Processing Method

Cited by 19 publications

References 34 publications

Evaluation of Torrefied Empty Fruit Bunch (EFB) and Kenaf Combustion Characteristics: Comparison Study between EFB and Kenaf Based on Microstructure Analysis and Thermogravimetric Methods

Evaluation of Torrefied Empty Fruit Bunch (EFB) and Kenaf Combustion Characteristics: Comparison Study between EFB and Kenaf Based on Microstructure Analysis and Thermogravimetric Methods

Experimental Study of Entrainment and Mixing of Renewable Active Particles in Fluidized Beds

From wood chips to pellets to milled pellets: The mechanical processing pathway of Austrian pine and European beech

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