Study of flow characteristics of biomass and biomass–coal blends

Guo, Zhiguo; Chen, Xueli; Xu, Yang; Liu, Haifeng

doi:10.1016/j.fuel.2014.10.062

Cited by 27 publications

(11 citation statements)

References 41 publications

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“…Thus, the total different coal combustion performance that has higher S value will not be accepted in the coal-fired power plant. The coal feeding system is also limited to the amount of biomass in the coal blended, and it will be not necessary to modify the system with 10 % biomass addition [42]. Thus, the redesigning the burner, and slagging, fouling and corrosion problems can be avoided.…”

Section: Ignition Burnout and Complicated Performances Of The Blendsmentioning

confidence: 99%

Influence of biomass on coal combustion based on thermogravimetry and Fourier transform infrared spectroscopy

Zhao

Zhang

et al. 2015

J Therm Anal Calorim

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The blending of coal with biomass can lead to synergistic combustion behaviors. The combustion profile of two biomass sources, two coals and subsequent blends was studied using thermogravimetric analysis (TG). Ignition and burnout performances were identified and calculated from thermal curves. The comprehensive combustion performance index S was calculated from the thermogravimetric curves. CO 2 and CO concentrations were also studied via on-line analysis of TG-Fourier transform infrared spectroscopy. The results indicated that complicated chemical processes took place when coal was combusted with biomass, as compared with coal or biomass only. The lower ignition temperatures and higher volatility of biomass significantly improve the combustion behavior of coal. However, when biomass content in the blends exceeded 10 %, ignition and burnout performances were minimally affected. The combustion index S appears to give a more comprehensive description of the combustion process. The results from CO/CO 2 ratio also support the combustion behavior for the blending of coal and biomass. For this study, the addition of 10 % of biomass would be the optimum recommended combustion ratios for coal and biomass blends.

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Section: Ignition Burnout and Complicated Performances Of The Blendsmentioning

confidence: 99%

Influence of biomass on coal combustion based on thermogravimetry and Fourier transform infrared spectroscopy

Zhao

Zhang

et al. 2015

J Therm Anal Calorim

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“…Hoppers, screws, pneumatic transportation in pipelines and feeding systems in thermochemical conversion processes are other examples. Physical properties such as particle size, particle shape and surface roughness affect the flowability of biomass particles [18,[26][27][28][29][30]. Biomass particles are cohesive; they may stick together in a flowing stream of particles and cause a variety of flow issues.…”

Section: Introductionmentioning

confidence: 99%

“…The convenient analyses to conduct the flow characterization of minerals are mostly used for biomass particles, too [16,18,28,29,[33][34][35][36][37][38][39]. Loose and tapped bulk densities represent a very quick method to estimate the flowability of particles [16,35].…”

Section: Introductionmentioning

confidence: 99%

Size, shape and flow characterization of ground wood chip and ground wood pellet particles

et al. 2016

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“…With specific reference to solids from particulate biomasses, handling and feeding present further difficulties due to peculiar properties both at particle level and at bulk level that make these materials even more unpredictable than other granular materials traditionally processed by industry, especially in terms of flow reliability and control [14][15][16]. As a result these materials often require a semi-empirical approach to correlate discharge and flow property data with composition [17,18]. Robust and reliable characterization methods for off-line measurements of particulate biomass flow properties are urgently needed, as well as biomass structure and composition characterization methods, suitable for on-line analysis of rapid material streams enabling fast non-destructive biomass classification procedures, e.g.…”

Section: Introductionmentioning

confidence: 99%

Assessment on bulk solids best practice techniques for flow characterization and storage/handling equipment design for biomass materials of different classes

Berry

Larsson

Lestander

et al. 2015

Fuel Processing Technology

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This paper shows the results of a collaborative project in which four different laboratories have carried out complementary characterization tests on samples of the same set of lignocellulosic biomass materials with the objectives of better understanding their properties and identifying any critical features of the different characterization procedures. Three different types of material were used as model biomasses: 1) Scots pine wood chips, as an example of a coarse and flaky particulate biomass with some elastic properties; 2) chopped straw of reed canary grass as a nesting biomass having long and flaky fibers; 3) Scots pine wood powder as a fine particulate with elastic and cohesive properties. Particle size and shape analyses were carried out with; calipers, 2D image analysis, 3D image analysis (ScanChip) and through mechanical sieving. Applications and validity limits of each of these techniques are evaluated and discussed. The flow function and internal friction 2 were determined with a Schulze ring shear tester, a Brookfield powder flow tester and a large ring shear tester. No significant differences in the results generated by these shear testing techniques were found. Wall friction measurements were carried out with a Schulze ring shear tester; a Brookfield powder flow tester; a large Jenike shear tester and a Casagrande shear box. Results, in this case, showed significant differences with a higher wall friction coefficient obtained with the larger shear cell. Additionally, tensile strengths of biomass materials were measured by the use of a novel measurement technique. Arching tests were carried out in a pilot scale plane silo with variable hopper geometry and results were compared with those predicted by applying the Jenike procedure and a modified procedure which assumed tensile strength was the controlling material property (rather than unconfined yield strength). Finally, safety of handling and storage was assessed by carrying out explosion tests on dusts from Scots pine and reed canary grass.KEYWORDS: lignocellulosic biomass, particle size, particle shape, flowability, arching, explosion RESEARCH HIGHLIGHTS: Suitable test methods were classified for three biomass classes  Different particle sizing methods give a wide range of results  Shear tests do not discriminate flowability differences between the biomass classes  Arching behavior depends more on tensile strength than on compressive strength  Scots pine and reed canary grass dusts are flammable

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Study of flow characteristics of biomass and biomass–coal blends

Cited by 27 publications

References 41 publications

Influence of biomass on coal combustion based on thermogravimetry and Fourier transform infrared spectroscopy

Influence of biomass on coal combustion based on thermogravimetry and Fourier transform infrared spectroscopy

Size, shape and flow characterization of ground wood chip and ground wood pellet particles

Assessment on bulk solids best practice techniques for flow characterization and storage/handling equipment design for biomass materials of different classes

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