Relationship between pyrolysis products and organic aerosols formed during coal combustion

Wang, Xiaofei; Cotter, Emma; Iyer, Kannan N.; Fang, Jiaxi; Williams, Brent J.; Biswas, Pratim

doi:10.1016/j.proci.2014.07.073

Cited by 37 publications

(35 citation statements)

References 20 publications

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“…Aerosol formation has been intensively studied in drop tube furnace to simulate industrial coal combustion [22,23,39]. Since coal in household stove is relatively fixed in the bottom of combustion chamber during combustion.…”

Section: Possible Mechanismmentioning

confidence: 99%

“…These high emissions from residential coal combustion are concerned due to the negative health impact associated with PM 2.5 (PM with aerodynamic diameter less than or equal to 2.5 lm) [14][15][16][17][18], as well as the negative impact on climate and visibility [19,20]. During high PM pollutant episodes in winter, coal combustion is possibly the largest anthropogenic source, especially for organic aerosol [21][22][23]. In response to haze pollution and visibility degradation in China, the government has updated policies on residential coal properties to reduce PM emissions from residential activities, e.g., lowering the threshold values for coal ash on dry basis (A d , required to be less than 16% for Beijing-Tianjin-Hebei region) and coal volatile matter content on dry and ash-free basis (V daf , required to be less than 10% and 20% for anthracite and bituminous briquettes, respectively, in Beijing) [24,25].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influences of coal size, volatile matter content, and additive on primary particulate matter emissions from household stove combustion

Jiang

Zhang

et al. 2016

Fuel

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Section: Possible Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influences of coal size, volatile matter content, and additive on primary particulate matter emissions from household stove combustion

Jiang

Zhang

et al. 2016

Fuel

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“…These compounds might play a significant role in colonial Microcystis formation due to their polymer function (Lee et al 2005;Lin and Chen 2006). Wang et al (2015) also reported that N-benzyl-N-ethy-P-isopropylbenzamide, detected in the extracts of a colonial M. aeruginosa FACHB939, was responsible for organic aerosols and mucilage formation. For M. wesenbergii, a total of 24 compounds were identified in coculture extractions.…”

Section: Extracellular Metabolic Substancesmentioning

confidence: 95%

Experimental evidence for the role of heterotrophic bacteria in the formation of Microcystis colonies

et al. 2015

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Microcystis, a genus of cyanobacteria that is dominant in eutrophic lakes, occurs mainly as colonial morphs under natural conditions but as single cells in laboratory cultures. Recent studies have suggested that Microcystis-bacteria interactions significantly influence Microcystis morphology, but the underlying mechanism remains unclear. In this study, a total of 48 strains of heterotrophic bacteria were purified from Microcystis mucilage. Five bacteria, Aeromonas veronii, Enterobacter aerogenes, Exiguobacterium acetylicum, Bacillus cereus and Shewanella putrefaciens, can induce unicellular Microcystis to form colonies. Heterotrophic bacteria stimulated Microcystis growth and induced the production of extracellular polymeric substances in coculture treatments. Extracellular polymeric substances, such as extracellular polysaccharides (EPS), were responsible for the mucilage formation in colonial Microcystis. We analysed extracellular metabolic compounds produced by Microcystis aeruginosa and Microcystis wesenbergii using gas chromatography mass spectrometry. Filtrate extracts from coculture treatments indicated that some compounds, such as 2-dodecen-1-yl(-) s u c c i n i c a n h y d r i d e a n d b e n z o i c a c i d , 2 , 3 -bis[(trimethylsilyl)oxy]-, trimethylsilyl ester, might play a significant role in colonial M. aeruginosa or M. wesenbergii formation. Our data suggested that the interaction of Microcystis and heterotrophic bacteria was crucial for the formation of Microcystis colony and outbreak of Microcystis blooms.

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“…The thermal behaviour of coal is determined mostly by using TG. Although, many works on biomass combustion with TG [11][12][13][14][15] and coal combustion [16][17][18][19][20][21][22][23] are available in the literature, investigations on 'enriched coal' are rather less [24][25][26]. The enrichment of coal provides an opportunity for the separation of coals and their maceral composition due to the difference of densities [27].…”

Section: Journal Of Combustionmentioning

confidence: 99%

Investigation of the Thermal Improvement and the Kinetic Analysis of the Enriched Coal

Duzyol

Şensöğüt

2018

Journal of Combustion

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The present research work is comprised of three main parts. The first part is about the enrichment of lignite coal by the utilization of dense medium separation called float and sink method. The second part deals with the investigation of the thermal behaviour for the coals enriched while the last part is concerned with the kinetic analysis of the coal combustion. The float and sink method is the mostly used technique for low-rank coal beneficiation in coal preparation plants of Turkey. In order to realize this process, the coal samples were, at first, fractioned to five different sizes which were -32+25 mm, -25+16 mm, -16+8 mm, -8+4.75 mm, and -4.75+2 mm. Each fraction was, then, processed in the dense mediums with the specific gravities of 1.20, 1.30, 1.40, 1.50, and 1.60 g/cm3, respectively. The thermal behaviour of the floated materials from the float and sink process was investigated in detail with the thermogravimetric analysis (TG) and the differential thermogravimetric analysis (DTG). The ignition and peak temperatures for the samples were also ascertained and correlated with the float and sink test results. In the final part of the study, the kinetic analysis of the coal samples was carried out by the Coats–Redfern method and the activation energies of the enriched coals were determined. The activation energies of the raw and the enriched coals were assessed and compared. The calculated activation energy values for the combustion reactions of the coal samples ranged were found to be between 15.17 kJ/mol and 97.45 kJ/mol. The strong correlation was obtained between the float and sink test results especially with the ash content of the coal samples and the combustible characteristic of the floated materials such as ignition temperatures, peak temperatures, and activation energies. The combustion characteristics of the coal samples were resultantly ascertained to be very dependent on the coal structure.

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Relationship between pyrolysis products and organic aerosols formed during coal combustion

Cited by 37 publications

References 20 publications

Influences of coal size, volatile matter content, and additive on primary particulate matter emissions from household stove combustion

Influences of coal size, volatile matter content, and additive on primary particulate matter emissions from household stove combustion

Experimental evidence for the role of heterotrophic bacteria in the formation of Microcystis colonies

Investigation of the Thermal Improvement and the Kinetic Analysis of the Enriched Coal

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