Effects of particle shape and size on devolatilization of biomass particle

Lu, Hong Bo; Ip, Elvin; Scott, Justin; Foster, Paul; Vickers, Mark S.; Baxter, Larry

doi:10.1016/j.fuel.2008.10.023

Cited by 278 publications

(157 citation statements)

References 49 publications

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“…Pambudi et al [32] and Lu et al [33] found that the surface area per unit mass, as well as the diameter of biomass briquette, affects the reaction time and combustion GT. This experimental result was obtained with a rod biomass fuel that was 32 mm in diameter and approximately 50 mm in length.…”

Section: Comparison Of Energy Consumption and System Thermal Efficiencymentioning

confidence: 99%

Integrated Furnace for Combustion/Gasification of Biomass Fuel for Tobacco Curing

Wang

Zhang

Wei

et al. 2018

Waste Biomass Valor

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A new system for providing heat for the flue-curing of tobacco was developed by modifying the conventional direct combustion of biomass fuel (bio-fuel) such that the energy stored in the fuels was fully utilized. The system consisted of an integrated furnace with a heat dissipation structure for combusting and gasifying bio-fuel including solid fuel as well as combusting the generated gas, and a heat exchanger with a special flue pipe layout. The new device was tested through experiments in different tobacco-growing areas, using the controlled direct combustion of coal and biomass fuel for flue-curing in a bulk curing barn. The results showed that the distribution of temperature in the longitudinal section of the new system exhibited a regular temperature transition pattern corresponding to the solid fuel and gas combustion areas. The amount of carbon monoxide in the flue gas at the chimney exit indicated that the burning of the biomass briquette fuel was more complete, with less than 1.7% carbon monoxide generated. The thermal efficiencies of the biomass briquette fuel and firewood were 55.26 and 53.17%, respectively, which were higher than that of coal (49.52%). The newly developed integrated furnace would be well suited for tobacco curing in tobacco-growing areas, and could be used commercially for drying agricultural products on different scales.

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Section: Comparison Of Energy Consumption and System Thermal Efficiencymentioning

confidence: 99%

Integrated Furnace for Combustion/Gasification of Biomass Fuel for Tobacco Curing

Wang

Zhang

Wei

et al. 2018

Waste Biomass Valor

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“…sphericity, symmetry and aspect ratio) by using one of the discussed techniques. Various biomass shapes result in different volume-to-surface area ratios which determine heat and mass transfer [44,9]. A spherical particle, as commonly used in literature [45], has a higher volume to surface area ratio than a cylindrical particle of the same volume.…”

Section: Discussionmentioning

confidence: 99%

“…A cylindrical shape allows treatment of biomass particles as one-dimensional [9]. Thus, it is recommended to represent biomass particles as infinite cylinders, corresponding to f = 1 with a particle size equal to x Ma min diameter, as shown in equation 15.…”

Section: Representation Of Biomass Particle Shape In Modelingmentioning

confidence: 99%

“…Increased energy input into biomass comminution affects the total efficiency of a power plant, and too large particles often cause problems with flame stability and burnout. Fuel characterization plays an important role in combustion modeling [6][7][8][9][10][11]. The surface area and volume of the particle are important parameters since they determine combustion rates and define residence time.…”

Section: Introductionmentioning

confidence: 99%

“…However, as the fuel particle shape becomes more complex, at least two parameters (width and length) are necessary to describe the particle size. Despite numerous studies on biomass particles [7,13,14,[9][10][11], there is no consensus on how to represent a biomass particle in combustion models. The common way involves approximating of the particle shape to regular geometrical bodies (e.g.…”

Section: Introductionmentioning

confidence: 99%

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One way of representing the size and shape of biomass particles in combustion modeling

Trubetskaya

Beckmann²,

Wadenbäck

et al. 2017

Fuel

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a b s t r a c tThis study aims to provide a geometrical description of biomass particles that can be used in combustion models. The particle size of wood and herbaceous biomass was compared using light microscope, 2D dynamic imaging, laser diffraction, sieve analysis and focused beam reflectance measurement. The results from light microscope and 2D dynamic imaging analysis were compared and it showed that the data on particle width, measured by these two techniques, were identical. Indeed, 2D dynamic imaging was found to be the most convenient particle characterization method, providing information on both the shape and the external surface area. Importantly, a way to quantify all three dimensions of biomass particles has been established. It was recommended to represent a biomass particle in combustion models as an infinite cylinder with the volume-to-surface ratio (V/A) measured using 2D dynamic imaging.

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Transfer

Roekaerts

2014

Biomass as a Sustainable Energy Source for the Future

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Effects of particle shape and size on devolatilization of biomass particle

Cited by 278 publications

References 49 publications

Integrated Furnace for Combustion/Gasification of Biomass Fuel for Tobacco Curing

Integrated Furnace for Combustion/Gasification of Biomass Fuel for Tobacco Curing

One way of representing the size and shape of biomass particles in combustion modeling

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