Measurements of particulate matter concentration by the light scattering method: Optimization of the detection angle

Chen, Dong; Liu, Xiaowei; Han, Jinke; Jiang, Man; Xu, Yishu; Xu, Minghou

doi:10.1016/j.fuproc.2018.06.016

Cited by 43 publications

(25 citation statements)

References 30 publications

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“…The relationship between polydisperse particle mass concentration and the light scattering intensity of a fixed angle is described in Equation (6) according to theory by Hulst, V.D. [35] and the former study of Chen et al [23]. The normalized particle mass size distribution f m ( D ) is described in Equation (7).…”

Section: Methods and Calculationsmentioning

confidence: 99%

“…In addition, Görner [22] calculated the scattering light of 1 mg/m 3 particles with different particle size and found the light intensity of submicron particles could be an order of magnitude higher than micron particles. Later, Chen et al [23] experimentally demonstrated the sensitivity of mass concentration changes with particle size at any detection angle. In coal-fired power plants, the size of particles varies with time due to the coal type, combustion condition, boiler load, and precipitator performance [6,24,25].…”

Section: Introductionmentioning

confidence: 99%

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A New Angular Light Scattering Measurement of Particulate Matter Mass Concentration for Homogeneous Spherical Particles

Chen

Liu

Han

et al. 2019

Sensors

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Under the condition of ultra-low emission for power plants, the particulate matter concentration is significantly lower than that of typical power plants a decade ago, which posed new challenges for the particulate matter monitoring of stationary emission. The monitoring of particulate matter mass concentration based on ensemble light scattering has been found affected by particle size. Thus, this study develops a method of using the scattering angular distribution to obtain the real-time particle size, and then correct the particulate matter concentration with the real-time measured particle size. In this study, a real-time aerosol concentration and particle size measurement setup is constructed with a fixed detector at the forward direction and a rotating detector. The mass concentration is measured by the fixed detector, and the particle size is measured from the intensity ratio of the two detectors. The simulations show that the particle size has power law functionality with the angular spacing of the ripple structure according to Mie theory. Four quartz aerosols with different particle size are tested during the experiment, and the particle size measured from the ripple width is compared with the mass median size measured by an electrical low pressure impactor (ELPI). Both techniques have the same measurement tendency, and the measurement deviation by the ripple width method compared with ELPI is less than 15%. Finally, the measurement error of the real-time mass concentration is reduced from 38% to 18% with correction of the simultaneously measured particle size when particle size has changed.

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Section: Methods and Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A New Angular Light Scattering Measurement of Particulate Matter Mass Concentration for Homogeneous Spherical Particles

Chen

Liu

Han

et al. 2019

Sensors

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Section: Abstract -mentioning

confidence: 99%

“…The light scattering method is a high resolution and accurate, non-invasive method with a wide array of possible applications, especially at low concentrations. Regarding the use of this method in power plants, particle refractive index, density and shape have to be taken into account [10].The study of Peng et al studied particle size distribution in different humidity conditions using ELPI (Electrical Low Pressure Impactor). Increased humidity causes increase in total concentration of PM, as shown by results.…”

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confidence: 99%

Particulate Matter Emission Decrease Possibility from Household Sector using Flue Gas Condenser – Fog Unit. Analysis and Interpretation of Results

Priedniece

Kalniņš

Kirsanovs

et al. 2019

Environmental and Climate Technologies

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Particulate matter (PM) is a significant pollution problem on the global scale. There are different ways to measure PM from stationary sources. The most used types of PM collection methods include different filters. These include cellulose, glass, mixed and membrane filters. In this study PM samples were measured in the flue gas condenserfog unit system before and after the unit according to ISO 9096 standard using isokinetic and gravimetric method. PM concentrations after fog unit were measured at different water flows and nozzle types. Impact factors, that effect PM concentrations before and after the fog unit are listed and studied in detail. Achieved results show that the fog unit can be one potential technology for particle matter emission decrease from the household sector. Keywords -Flue gas condenser; flue gas treatment; fog unit household emissions; isokinetic and gravimetric method; particulate matter Nomenclature PM Particulate matter µg/m 3 or mg/Nm 3 t Temperature °C m Mass mg or g Environmental and Climate Technologies ____________________________________________________________________________ 2019 / 23 136The problem of PM pollution is topical throughout the globe. The World Health organization has developed guidelines for created PM, ozone, nitrogen dioxide and sulphur dioxide emissions, that are based on evaluation of data gained through expert-conducted scientific studies and are applicable to any country. Guideline values are set for PM2.5 (fine particulate matter, FPM) and PM10 (coarse particulate matter, CPM). An annual mean for PM2.5 is 10 µg/m 3 , but 24-hour mean should not exceed 25 µg/m 3 . For PM10 annual mean is 20 µg/m 3 , but 24-hour mean is 50 µg/m 3 [3]. Study done by Steinberga shows that maximum daily concentration of PM2.5 and PM10 at Riga can reach 52.5 µg/m 3 at summer months and 83.4 µg/m 3 at winter months, respectively [4].A study by Chen et al. shows that in 2015 over 45 % from PM emissions in Europe were created by small capacity combustion units, while industrial wood combustion units can create an amount of PM that is comparable to one measured in densest cities at traffic hours. Studies carried out in China have shown that biomass use in combustion units can make up to 19-37 % of the total PM amount, depending on weather conditions and season, as well the type of biomass used. The parameter of fuel that causes the biggest impact on PM emissions is its moisture content [5], [6]. However, PM10 emission which come from transport sector also must be taken into account to solve pollution problem with solid emissions concentration in the world [7].There are different ways to measure PM emissions and to determine their concentration that can be found in literature. For example, International Organization for Standardization (ISO) has issued several standards for the determination of stationary source emissions, such as ISO 25597:2013: Test method for determining PM2.5 and PM10 in stack gases using cyclone and sample dilution systems [8] and ISO 9096:2017 for Manual determina...

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“…In recent years, the monitoring of air pollution has been heavily focused on particulate matter (PM) [1,2]. The negative impact of fine and ultra-fine particles has been studied by many authors.…”

Section: Introductionmentioning

confidence: 99%

Particulate Matter Produced by Micro-Scale Biomass Combustion in an Oxygen-Lean Atmosphere

et al. 2018

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This article extends earlier research by the authors that was devoted to the experimental evaluation of ultra-fine particles produced by the laboratory combustion of beechwood samples. These particles can have severe influence on human health. The current paper presents a parametrical study carried out to assess the influence of the composition of the atmosphere and the temperature on the production of ultra-fine particles during the micro-scale combustion process. The paper presents a laboratory procedure that incorporate the thermogravimetric analysis (TGA) and detailed monitoring of the size distribution of the produced fine particles. The study utilises the laboratory scale identification of the formation and growth of the fine particles during the temperature increase of beech wood samples. It also compares the particle emissions produced by beech heartwood and beech bark. The size of the emitted particles is very strongly influenced by the concentration of light volatiles released from the heated wood sample. From the experimental study, decreasing oxygen content in the atmosphere generally results in higher particulate matter (PM) production.

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Measurements of particulate matter concentration by the light scattering method: Optimization of the detection angle

Cited by 43 publications

References 30 publications

A New Angular Light Scattering Measurement of Particulate Matter Mass Concentration for Homogeneous Spherical Particles

A New Angular Light Scattering Measurement of Particulate Matter Mass Concentration for Homogeneous Spherical Particles

Particulate Matter Emission Decrease Possibility from Household Sector using Flue Gas Condenser – Fog Unit. Analysis and Interpretation of Results

Particulate Matter Produced by Micro-Scale Biomass Combustion in an Oxygen-Lean Atmosphere

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