Behavior of suspended particulate matter emitted from combustion of agricultural residue biomass under different temperatures

Wang, Qingyue; Itoh, Sadahiko; Itoh, Kazunori; Apaer, P.; Chen, Q.; Niida, D.; Mitsumura, N.; Animesh, S.; Sekiguchi, K.; Endo, Takatsugu

doi:10.2495/esus130271

Cited by 6 publications

(5 citation statements)

References 10 publications

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“…The emissions of low molecular weight organic acids also follow the similar variation trends with combustion efficiency as those of OC or WSOC emission factors ( Figure S2). These trends are generally in agreement with previous studies (Dhammapala et al, 2006;Holder et al, 2016;Jen et al, 2019;Reisen et al, 2018;Wang et al, 2013). Under the same burning conditions, the emission factors of particles or organic aerosols from corn burning were slightly higher than those from wheat burning (Figure 3).…”

Section: Influence Of Combustion Efficiency On Emission Factorssupporting

confidence: 92%

Chemical composition and light absorption of carbonaceous aerosols emitted from crop residue burning: Influence of combustion efficiency

Wang¹,

Hu²,

Xu³

et al. 2020

Preprint

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Abstract. Biomass burning is one of the major sources of carbonaceous aerosols, which affects air quality, radiation budget and human health. Field straw residue burning is a widespread type of biomass burning in Asia, while its emissions are poorly understood compared with the wood burning emissions. In this study, lab-controlled straw (wheat and corn) burning experiments were designed to investigate the emission factors and light absorption properties of different biomass burning organic aerosol (BBOA) fractions, including water soluble organic carbon (WSOC), humic-like substances (HULIS) and water insoluble organic carbon (WISOC). The influences of biofuel moisture content and combustion efficiency on emissions are comprehensively discussed. The emission factors of PM2.5, OC and EC were 9.3 ± 3.4, 4.6 ± 1.9 and 0.21 ± 0.07 g/kg for corn burning and 8.7 ± 5.0, 3.9 ± 2.8 and 0.22 ± 0.05 g/kg for wheat burning, generally lower than wood or forest burning emissions. Though the mass contribution of WISOC among OC (32 %–43 %) was lower than WSOC, the light absorption contribution of WISOC (57 %–84 % @ 300–400 nm) surpassed WSOC due to the higher mass absorption eﬃciency (MAE) of WISOC. The results suggested that BBOA light absorption would be largely underestimated if only considering the water soluble fractions. However, the light absorption of WSOC among near-UV ranges, occupying 39 %–43 % of the total extracted OC absorption at 300 nm, cannot be negligible due to the sharper increase of absorption towards shorter wavelength compared with WISOC. HULIS were the major light absorption contributors among WSOC, due to the higher MAE of HULIS than other high-polarity WSOC components. The emission levels and light absorption of BBOA were largely influenced by the burning conditions, indicated by modified combustion efficiency (MCE) calculated by measured CO and CO2 in this work. The emission factors of PM2.5, OC, WSOC, HULIS and organic acids were enhanced under lower-MCE conditions or during higher-moisture straw burning experiments. Light absorption coefficients of BBOA at 365 nm were also observed higher under lower-MCE conditions, which was mainly due to the elevated mass emission factors. Our results suggested that the influence of varied combustion efficiency on particle emissions could surpass the differences caused by different types of biofuels. Thus, the burning efficiency or conditions should be taken into consideration when estimating the influence of biomass burning. In addition, we observed that the K+ / OC and Cl− / OC ratios increased under higher-MCE conditions due to the enhancement of released potassium and chlorine under higher fire temperatures during flaming combustion. This indicates that potassium ion, as a commonly used biomass burning tracer, may lead to estimation uncertainty if without considering the burning conditions.

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Section: Influence Of Combustion Efficiency On Emission Factorssupporting

confidence: 92%

Chemical composition and light absorption of carbonaceous aerosols emitted from crop residue burning: Influence of combustion efficiency

Wang¹,

Hu²,

Xu³

et al. 2020

Preprint

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“…Since waste rice husk heating value is lower than waste rice straw based on our studies [10][11], however, waste rice husk and straw is much lower when compared to fossil fuel. Therefore, it is necessary to find the suitable combustion conditions for effective utilization as biomass fuel of waste rice husk.…”

Section: Measurements In the Composition Of Waste Rice Huskmentioning

confidence: 68%

Characterization of polycyclic aromatic hydrocarbons in suspended fine particulate matter emitted from rice husk burning under different combustion temperature conditions

Wang¹,

Kobayashi²,

Lu³

et al. 2014

Energy and Sustainability V

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There exists large quantities of waste rice husk and around 3 million tons is estimated as biomass waste every year in Japan. Air pollutants emitted from exhaust gases of rice husk incineration lead to environmental damage, not only because of the influence on global environment and climate, when released into the atmosphere, but also on human health due to local air pollution. Therefore, it is necessary to effectively utilize waste rice husk to reduce air pollutants. In recent years, there is an increasing demand on the utilization of unused biomass instead of fossil oil fuel in combustors for farming-greenhouses heating during the winter season. With increasing demand will increase the running costs. In general, since these combustors are small scale in their sizes, there are lack of regulations or laws (e.g. the air pollution control act and the waste disposal and public cleaning law) in operation for their air pollution control. Although the small size combustors are characterized by their simplicity of structure and the low costs, however, they emit visible black carbon so-called elemental carbon as suspended fine particulate matter due to their poor combustion performance.In this study, we investigated the possibility of the substitution of fossil fuel by waste rice husk in laboratory model combustion experiments. We evaluated the emission behavior of harmful air pollutants emitted from rice husk combustion by measuring carbonaceous and polycyclic aromatic hydrocarbons (PAHs) in suspended fine particulate matter caused from the exhaust gases. From the analytical results we found that particulate mass concentrations reduced substantially at high temperature combustion. The PAH tot (total 27 species) varied in the range 72.5-876 ng/g at different combustion temperature. PAHs emissions and molecular weight increased with combustion temperature rise. We firstly reported that the six ring PAHs (AA, DB(a,e)F, DB(a,l)P, DB(a,e)P, DB(a,i)P and DB(a,h)P) are discharged from biomass burning in different combustion temperatures using small size combustors. From the results of our study, it can be suggested that stable combustion performance under suitable conditions in order to control less air pollutants emitted from biomass fuel although small size combustors are still not regulated. However, it is very necessary to develop appropriate exhaust gas treatment technology for the small combustion equipment.

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“…It is worth to develop different technologies for controlling air pollutants emitted from fuel utilization. Some achievements in this study have been applied and linked with other studies reported during the 4th International Conference on Energy and Sustainability [17][18][19].…”

Section: Co 2 Gasifi Cation Reactivity Of Waste Wood Char Samplesmentioning

confidence: 71%

Reactivity for pyrolysis and co2 gasification of alkali metal loaded waste wood char

Wang¹,

Apaer²,

Kurokawa³

et al. 2014

Int. J. SDP

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In this study, different carbonization processes were performed for thinning wood waste as organic industrial waste and forestry waste biomass to produce waste wood char, which is used as solid and gaseous fuel. Waste biomass samples were added to Na + (NaOH) using thermogravimetry with a differential thermal analyser (TG/DTA), where the behaviour of thermal decomposition and the effect of additive amount of alkali metal were investigated. Waste wood char yields were increased at the peak temperature and weight loss was decreased with the increment of Na + (NaOH) loaded value. The fi xed carbon amount of waste wood char was also increased with the maximum Na + (NaOH) loaded value at 100:1, and then it was decreased. Furthermore, in order to evaluate the effect of Na + (NaOH) loaded value on char reactivity, an isothermal CO 2 gasifi cation experiment was performed at temperatures between 700°C and 900°C for chars obtained by pyrolysis at 900°C. It was shown that the reaction rate was increased with increasing temperature and the reaction rate of raw char was markedly slower than Na + (NaOH) loaded char. The activation energies of char were in decreasing trend with increasing Na loaded value. However, the activation energies of CO 2 gasifi cation of char samples were conversely increased when Na + loaded on char sample was more than 50:1. If too large amounts of Na + (NaOH) were loaded on char sample, the rate of gasifi cation reaction and the activation energy will be decreased as Na + reacts with the char surface covering the gasifying agent.

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Behavior of suspended particulate matter emitted from combustion of agricultural residue biomass under different temperatures

Cited by 6 publications

References 10 publications

Chemical composition and light absorption of carbonaceous aerosols emitted from crop residue burning: Influence of combustion efficiency

Chemical composition and light absorption of carbonaceous aerosols emitted from crop residue burning: Influence of combustion efficiency

Characterization of polycyclic aromatic hydrocarbons in suspended fine particulate matter emitted from rice husk burning under different combustion temperature conditions

Reactivity for pyrolysis and co2 gasification of alkali metal loaded waste wood char

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