Fine combustion particles released during combustion of unit mass of beechwood

Sitek, Tomáš; Pospíšil, Jiří; Poláčik, Ján; Špiláček, Michal; Varbanov, Petar Sabev

doi:10.1016/j.renene.2019.03.089

Cited by 18 publications

(3 citation statements)

References 27 publications

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“…At a radial distance of about 80 mm the sheet integrity is markedly disturbed (i.e., a primary atomization occurs up to 125 mm forming larger ligament structures; Figure 12b 1). The first ligaments observed (at the distance of 78 mm) were as large as (1.86 ± 0.57) mm with a breakup time estimate of 10.9 ms (according to Equation (15)) and attenuating down to (0.75 ± 0.19) mm with a breakup time of 2.8 ms (at a distance of approximately 120 mm). The estimate of the ligament diameter was 0.70 mm (based on Equation (13) using the correlation in Equation 12for the dimensionless wave amplitude, at a radial distance of 120 mm).…”

Section: Spray Breakupmentioning

confidence: 99%

“…This includes, for example, CO 2 and VOC removal [1][2][3], flue gas desulphurization [4][5][6], and ammonia separation [7]. Last but not least, scrubbing systems have widely been recognized in separation of particulate matter [8][9][10][11][12], the release of which is due mostly to various combustion processes [13][14][15] and, for example, comminution technologies [16,17]. This is very important due to associated health and environmental concerns [18,19].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Spray Breakup in Turbulent Atomization Using a Spiral Nozzle

2019

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Spiral nozzles are widely used in wet scrubbers to form an appropriate spray pattern to capture the polluting gas/particulate matterwith the highest possible efficiency. Despite this fact, and a fact that it is a nozzle with a very atypical spray pattern (a full cone consisting of three concentric hollow cones), very limited amount of studies have been done so far on characterization of this type of nozzle. This work reports preliminary results on the spray characteristics of a spiral nozzle used for gas absorption processes. First, we experimentally measured the pressure impact footprint of the spray generated. Then effective spray angles were evaluated from the photographs of the spray and using the pressure impact footprint records via Archimedean spiral equation. Using the classical photography, areas of primary and secondary atomization were determined together with the droplet size distribution, which were further approximated using selected distribution functions. Radial and tangential spray velocity of droplets were assessed using the laser Doppler anemometry. The results show atypical behavior compared to different types of nozzles. In the investigated measurement range, the droplet-size distribution showed higher droplet diameters (about 1 mm) compared to, for example, air assisted atomizers. It was similar for the radial velocity, which was conversely lower (max velocity of about 8 m/s) compared to, for example, effervescent atomizers, which can produce droplets with a velocity of tens to hundreds m/s. On the contrary, spray angle ranged from 58° and 111° for the inner small and large cone, respectively, to 152° for the upper cone, and in the measured range was independent of the inlet pressure of liquid at the nozzle orifice.

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Section: Spray Breakupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study on Spray Breakup in Turbulent Atomization Using a Spiral Nozzle

2019

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“…Air pollution is related to emissions, a major green technology issue affecting everyone in many countries. Air pollution is also related to the emission sources, such as biomass burning 1,2) , industrial combustion process 3) , coal combustion [4][5][6] , and fuel combustion [7][8][9] . These emissions are divided into particulate and gaseous emissions.…”

Section: Introductionmentioning

confidence: 99%

A Gravimetry-Based Fine Particle Concentration Measurement System for Humid Environment Using Graphene Oxide Layer

Budianto,

Wirawan,

Ramadian Ridho Illahi

et al. 2023

Evergreen

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Recent studies have developed fine particle measurement systems using many methods. However, most of them are high-cost and unsuitable for harsh conditions. This study introduces a portable fine particle concentration system based on a gravimetry principle for air quality measurement in a highly humid environment. This study used a bare QCM (Q1) and graphene oxidecoated QCM (Q2) as the fine particle sensors. All sensors were installed inside a sensor box and tested at two different humidity levels: 75% (normal humidity) and 95% (high humidity). The sensors were tested using fine particle emissions (diameter 0.01 -2.5 µm) emitted from several combustion sources (three biomass samples). A handheld particle concentration measurement device was used as the comparator for the measurement system. The results show that the uncoated QCM has a lower frequency response than the GO-coated QCM. The bare QCM does not show significant accuracy and linearity. As expected, the coated QCM performs better than the uncoated QCM, where the peak accuracies of the coated QCM are 98% and 99% for normal and high humidities. The linearity and sensitivity levels of the coated QCM are 95-99% and 0.59 -1.76 Hz m 3 ug -1 . These performances confirm the reliability and ability of the developed system using GO layer and QCM to be employed as a fine particle emission sensing device in a humid environment.

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Computational Fluid Dynamics Study of Biomass Moisture Content Impact on Particle Matter Emissions

Milijašević,

Stojiljković,

Manić

2024

Environ Model Assess

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Fine combustion particles released during combustion of unit mass of beechwood

Cited by 18 publications

References 27 publications

Experimental Study on Spray Breakup in Turbulent Atomization Using a Spiral Nozzle

Experimental Study on Spray Breakup in Turbulent Atomization Using a Spiral Nozzle

A Gravimetry-Based Fine Particle Concentration Measurement System for Humid Environment Using Graphene Oxide Layer

Computational Fluid Dynamics Study of Biomass Moisture Content Impact on Particle Matter Emissions

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