Physical Properties for Flow Characterization of Ground Biomass from Douglas Fir Wood

Tannous, Kátia; Lam, Pak Sui; Sokhansanj, Shahab; Grace, John R.

doi:10.1080/02726351.2012.732676

Cited by 69 publications

(61 citation statements)

References 29 publications

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“…The smaller particles (<50 µm) tended to be described as irregularly shaped with aspect ratios near unity. Similar observations have been made concerning aspect ratio measurements for ground wood particles [25] and biochar [26].…”

Section: Particle Analysissupporting

confidence: 87%

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Analysis of Micronized Charcoal for Use in a Liquid Fuel Slurry

Long

Boyette

2016

Energies

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Yellow poplar (Liriodendron tulipifera) was chosen as the woody biomass for the production of charcoal for use in a liquid fuel slurry. Charcoal produced from this biomass resulted in a highly porous structure similar to the parent material. Micronized particles were produced from this charcoal using a multi-step milling process and verified using a scanning electron microscope and laser diffraction system. Charcoal particles greater than 50 µm exhibited long needle shapes much like the parent biomass while particles less than 50 µm were produced with aspect ratios closer to unity. Laser diffraction measurements indicated D10, D50, and D90 values of 4.446 µm, 15.83 µm, and 39.69 µm, respectively. Moisture content, ash content, absolute density, and energy content values were also measured for the charcoal particles produced. Calculated volumetric energy density values for the charcoal particles exceeded the No. 2 diesel fuel that would be displaced in a liquid fuel slurry.

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Section: Particle Analysissupporting

confidence: 87%

“…Energies 2017, 10,25gain in charcoal energy density, and a lower temperature would not allow complete pyrolysis and would produce a higher charcoal yield at the cost of charcoal energy density [22]. The charcoal was then processed using a multi-step milling process ( Figure 3).…”

Section: Methodsmentioning

confidence: 99%

Analysis of Micronized Charcoal for Use in a Liquid Fuel Slurry

Long

Boyette

2016

Energies

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“…Other indicators, e.g., bulk density, grain size distribution, specific surface area, energy value, and their relationship with the comminution process, are also important from the point of view of the final product quality [4,[21][22][23][24]. Previous studies conducted by other researchers have shown that the reduction of biomass particles' sizes result in improved flowability and movement properties; the material moves better, e.g., on feeders [25]. Grinding processes also increase the bulk density of the product, which allows, among others, to reduce storage space [5].…”

mentioning

confidence: 99%

The Integrated Energy Consumption Index for Energy Biomass Grinding Technology Assessment

et al. 2020

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The assessment of engineering objects in terms of energy consumption is an important part of sustainable development. Many materials, including those from the energy sector, need to undergo earlier processing, e.g., grinding. Grinding processes still demand a significant amount of energy, whereas current energy assessment methods do not take into account important parameters of the process, which makes it difficult to choose their optimal values. The study presents the analysis, testing, and assessment of mechanical engineering systems in terms of the energy consumption involved in the grinding of biomass intended for energy production purposes. A testing methodology was developed to improve the parameters of multi-disc grinding, including the reduction of energy consumption, power input, product quality improvement, and process efficiency. An original model of integrated energy consumption was developed. Tests were carried out on a five-disc grinder for five programs to assess the programmable angular speeds of the grinder discs. Output values, including specific energy demand, fragmentation degree, and integrated energy consumption, were assigned to each testing program. The test results were subjected to statistical analysis. Based on the authors' own research, it was found that the angular speed of the discs and, consequently, the linear speed of the grinding blades, have a significant influence on the values of the integrated energy consumption of the preliminary process.Acquiring energy from biomass requires its earlier preparation: drying, grinding, palletizing, etc. [7]. These procedures require certain energy inputs (costs) which significantly decrease the energy and environmental balance in the entire lifecycle of the energy material (wood, grain biomass, etc.) [8][9][10][11][12][13]. According to the idea of sustainable development concerning the design of systems, devices, and processes, in three areas-the environment, society, and economy-the biomass processing lines should be characterized by the lowest possible energy consumption and environmental impact [14,15]. It also aims to improve the competitiveness of biomass fuels in relation to conventional fossil fuels [16,17].Before being used for energy purposes, energy media need to be properly prepared, e.g., their dimensions need to be reduced by means of grinding [2]. Roller, drum, ball, hammer, and disc mills are used to grind granular biomaterials (biomass grains) [7,18]. Tests have shown that the best relations between product quality, yield, and grinding energy consumption occur for hammer and disc mills [2,7]. The quality of the grinding product is most often determined by the grinding degree, which is defined as the ratio of the characteristic dimensions of the particles before and after size reduction [19,20]. Other indicators, e.g., bulk density, grain size distribution, specific surface area, energy value, and their relationship with the comminution process, are also important from the point of view of the final product quality [4,[21][22]...

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“…Physical properties like particle size, particle shape and density influence the material handling and flowability of particles that are leading properties for an uninterrupted feeding system [62]. Chemical properties like elemental and proximate analyses influence the pyrolysis products' distribution and properties.…”

Section: Feedstock Pretreatmentmentioning

confidence: 99%

Woody Feedstock Pretreatments to Enhance Pyrolysis Bio-oil Quality and Produce Transportation Fuel

Rezaei¹,

Yazdanpanah²,

Lim³

et al. 2019

Biomass for Bioenergy - Recent Trends and Future Challenges

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Lignocellulosic biomass as a potential renewable source of energy has a nearzero CO 2 emission. Pyrolysis converts biomass to a liquid fuel and increases the energy density and transportability. The pyrolysis bio-oil shows promising properties to substitute the conventional fossil fuels. But, unprocessed biomass is low in bulk and energy density; high in moisture; heterogeneous in physical and chemical properties, highly hygroscopic and difficult to handle. That is why the biomass needs mechanical, chemical and/or thermal pretreatments to turn into a more homogeneous feedstock and minimize the post-treatment fuel upgrading. This chapter explains the effects that various pretreatments such as size reduction, drying, washing and thermal pretreatments have on the quality and quantity of bio-oil. Washing with water or acid/alkali solutions extracts the minerals that consequently reduces the ash and shortens the reactor clean-out cycle. Torrefaction is gaining attention as an effective pretreatment to modify the quality of biomass in terms of physical and chemical properties. Torrefaction produces a uniform biomass with lower moisture, acidity and oxygen contents and higher energy density and grindability than raw biomass. Pyrolysis of torrefied biomass produces bio-oil with enhanced compositional and physical properties such as a higher heating value and increased C (lower O/C ratio).

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Physical Properties for Flow Characterization of Ground Biomass from Douglas Fir Wood

Cited by 69 publications

References 29 publications

Analysis of Micronized Charcoal for Use in a Liquid Fuel Slurry

Analysis of Micronized Charcoal for Use in a Liquid Fuel Slurry

The Integrated Energy Consumption Index for Energy Biomass Grinding Technology Assessment

Woody Feedstock Pretreatments to Enhance Pyrolysis Bio-oil Quality and Produce Transportation Fuel

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