Influence of fuel-bed temperatures on CO and condensed matter emissions from packed-bed residential coal combustion

2015 ◽  
Author(s):  
T. Makonese ◽  
D. Masekameni ◽  
H. Annegarn ◽  
P. Forbes
Keyword(s):  
Coal Combustion ◽  
Condensed Matter ◽  
Packed Bed ◽  
Residential Coal

Isotope signatures of atmospheric mercury emitted from residential coal combustion

2020 ◽  
pp. 118175
Author(s):  
Xinyu Li ◽  
Zhonggen Li ◽  
Ji Chen ◽  
Leiming Zhang ◽  
Runsheng Yin ◽  
...  
Keyword(s):  
Coal Combustion ◽  
Atmospheric Mercury ◽  
Residential Coal

scholarly journals Quantifying primary and secondary humic-like substances in urban aerosol based on emission source characterization and a source-oriented air quality model

2018 ◽  
Author(s):  
Xinghua Li ◽  
Junzan Han ◽  
Philip K. Hopke ◽  
Jingnan Hu ◽  
Qi Shu ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Biomass Burning ◽  
Coal Combustion ◽  
Power Plants ◽  
Water Soluble ◽  
Aerosol Formation ◽  
Source Characterization ◽  
Air Quality Model ◽  
Coal Burning ◽  
Residential Coal

Abstract. Humic-like substances (HULIS) are a mixture of high molecular weight, water-soluble organic compounds that are widely distributed in atmospheric aerosol. Their sources are rarely studied quantitatively. Biomass burning is generally accepted as a major primary source of ambient humic-like substances (HULIS) with additional secondary material formed in the atmosphere. However, the present study provides direct evidence that residential coal burning is also a significant source of ambient HULIS, especially in the heating season in northern China based on source measurements, ambient sampling and analysis, and apportionment with source-oriented CMAQ modeling. Emissions tests show that residential coal combustion produces 5 to 24 % of the emitted organic carbon (OC) as HULIS carbon (HULISc). Estimation of primary emissions of HULIS in Beijing indicated that residential biofuel and coal burning contribute about 70 % and 25 % of annual primary HULIS, respectively. Vehicle exhaust, industry, and power plants contributions are negligible. Average concentration of ambient HULIS was 7.5 μg/m3 in atmospheric PM2.5 in urban Beijing and HULIS exhibited obvious seasonal variations with the highest concentrations in winter. HULISc account for 7.2 % of PM2.5 mass, 24.5 % of OC, and 59.5 % of water-soluble organic carbon, respectively. HULIS are found to correlate well with K+, Cl−, sulfate, and secondary organic aerosol suggesting its sources include biomass burning, coal combustion and secondary aerosol formation. Source apportionment based on CMAQ modeling shows residential biofuel and coal burning, secondary formation are important annual sources of ambient HULIS, contributing 57.5 %, 12.3 %, and 25.8 %, respectively.

Impact of rural residential coal combustion on air pollution in Shandong, China

Chemosphere ◽  
2020 ◽  
Vol 260 ◽  
pp. 127517 ◽  
Author(s):  
Ying Zhou ◽  
Teng Zi ◽  
Jianlei Lang ◽  
Dawei Huang ◽  
Peng Wei ◽  
...  
Keyword(s):  
Air Pollution ◽  
Coal Combustion ◽  
Residential Coal

Residential Coal Combustion as a Source of Levoglucosan in China

2018 ◽  
Vol 52 (3) ◽  
pp. 1665-1674 ◽  
Author(s):  
Caiqing Yan ◽  
Mei Zheng ◽  
Amy P. Sullivan ◽  
Guofeng Shen ◽  
Yingjun Chen ◽  
...  
Keyword(s):  
Coal Combustion ◽  
Residential Coal

Atmospheric Mercury Emissions from Residential Coal Combustion in Guizhou Province, Southwest China

2019 ◽  
Vol 33 (3) ◽  
pp. 1937-1943 ◽  
Author(s):  
Zikang Cui ◽  
Zhonggen Li ◽  
Yanzhe Zhang ◽  
Xuefeng Wang ◽  
Qili Li ◽  
...  
Keyword(s):  
Coal Combustion ◽  
Southwest China ◽  
Atmospheric Mercury ◽  
Guizhou Province ◽  
Mercury Emissions ◽  
Residential Coal

The contribution of residential coal combustion to PM 2.5 pollution over China's Beijing-Tianjin-Hebei region in winter

2017 ◽  
Vol 159 ◽  
pp. 147-161 ◽  
Author(s):  
Zhongzhi Zhang ◽  
Wenxing Wang ◽  
Miaomiao Cheng ◽  
Shijie Liu ◽  
Jun Xu ◽  
...  
Keyword(s):  
Coal Combustion ◽  
Pm 2.5 ◽  
Residential Coal

Characteristics of carbonaceous particles from residential coal combustion and agricultural biomass burning in China

2017 ◽  
Vol 8 (3) ◽  
pp. 521-527 ◽  
Author(s):  
Jie Tian ◽  
Haiyan Ni ◽  
Junji Cao ◽  
Yongming Han ◽  
Qiyuan Wang ◽  
...  
Keyword(s):  
Biomass Burning ◽  
Coal Combustion ◽  
Carbonaceous Particles ◽  
Agricultural Biomass ◽  
Residential Coal

scholarly journals Characterization and source apportionment of atmospheric organic and elemental carbon during fall and winter of 2003 in Xi'an, China

2005 ◽  
Vol 5 (11) ◽  
pp. 3127-3137 ◽  
Author(s):  
J. J. Cao ◽  
F. Wu ◽  
J. C. Chow ◽  
S. C. Lee ◽  
Y. Li ◽  
...  
Keyword(s):  
Biomass Burning ◽  
Coal Combustion ◽  
Elemental Carbon ◽  
Gasoline Engine ◽  
Motor Vehicle ◽  
Total Carbon ◽  
Carbonaceous Aerosol ◽  
Shaanxi Province ◽  
Engine Exhaust ◽  
Residential Coal

Abstract. Continuous measurements of atmospheric organic and elemental carbon (OC and EC) were taken during the high-pollution fall and winter seasons at Xi'an, Shaanxi Province, China from September 2003 through February 2004. Battery-powered mini-volume samplers collected PM2.5 samples daily and PM10 samples every third day. Samples were also obtained from the plumes of residential coal combustion, motor-vehicle exhaust, and biomass burning sources. These samples were analyzed for OC/EC by thermal/optical reflectance (TOR) following the Interagency Monitoring of Protected Visual Environments (IMPROVE) protocol. OC and EC levels at Xi'an are higher than most urban cities in Asia. Average PM2.5 OC concentrations in fall and winter were 34.1±18.0 μg m−3 and 61.9±;33.2 μg m−3, respectively; while EC concentrations were 11.3±6.9 μg m−3 and 12.3±5.3 μg m−3, respectively. Most of the OC and EC were in the PM2.5 fraction. OC was strongly correlated (R>0.95) with EC in the autumn and moderately correlated (R=0.81) with EC during winter. Carbonaceous aerosol (OC×1.6+EC) accounted for 48.8%±10.1% of the PM2.5 mass during fall and 45.9±7.5% during winter. The average OC/EC ratio was 3.3 in fall and 5.1 in winter, with individual OC/EC ratios nearly always exceeding 2.0. The higher wintertime OC/EC corresponded to increased residential coal combustion for heating. Total carbon (TC) was associated with source contributions using absolute principal component analysis (APCA) with eight thermally-derived carbon fractions. During fall, 73% of TC was attributed to gasoline engine exhaust, 23% to diesel exhaust, and 4% to biomass burning. During winter, 44% of TC was attributed to gasoline engine exhaust, 44% to coal burning, 9% to biomass burning, and 3% to diesel engine exhaust.

Smog chamber study on the evolution of fume from residential coal combustion

2012 ◽  
Vol 24 (1) ◽  
pp. 169-176 ◽  
Author(s):  
Chunmei Geng ◽  
Kun Wang ◽  
Wei Wang ◽  
Jianhua Chen ◽  
Xiaoyu Liu ◽  
...  
Keyword(s):  
Coal Combustion ◽  
Smog Chamber ◽  
Chamber Study ◽  
Residential Coal

scholarly journals Aerosol particle morphology of residential coal combustion smoke

2014 ◽  
Vol 24 (2) ◽  
pp. 24-28 ◽  
Author(s):  
T. Makonese ◽  
P. Forbes ◽  
L. Mudau ◽  
H.J. Annegarn
Keyword(s):  
Aerosol Particle ◽  
Coal Combustion ◽  
Fine Particles ◽  
Bulk Composition ◽  
Particle Morphology ◽  
Sampling Interval ◽  
Quartz Fibre ◽  
University Of Pretoria ◽  
The University ◽  
Residential Coal

A study carried out at the University of Pretoria characterised aerosol particle morphology of residential coal combustion smoke. The general approach in this study was on individual particle conglomerations because the radiative, environmental, and health effects of particles may depend on specific properties of individual particles rather than on the averaged bulk composition properties. A novel, miniature denuder system, developed and tested at the University of Pretoria, was used to capture particle emissions from the coal fires. The denuder consists of two silicone rubber traps (for gas phase semi-volatile organic compound monitoring) in series separated by a quartz fibre filter (for particle collection). The denuders were positioned 1 m away from the fire and were connected to pumps that sampled ~5 litres of air over a 10 min sampling interval. A JSM 5800LV Scanning Electron Microscope with a Thermo Scientific EDS was used to analyse the structure and morphology of different aerosol samples from the quartz fibre filters. Eight samples from the different fire lighting methods were selected for SEM analysis. The punched samples were sputter coated with gold for ~15 minutes using a K550 Emitech Sputter Coater. Results show that apart from the fine and ultra-fine particles, coal smoke from domestic burning also contains aerosols greater than 5 μm in diameter. Consequently, we describe the potential for generation of ‘giant’ carbonaceous soot conglomerates with outer diameters of 5 to 100 μm. However, the exact mechanism for formation of such large soot conglomerates remains to be determined. We also describe the presence of spherules and solid ‘melted toffee’ irregular surfaces. Circumstantial evidence is used to postulate and discuss the possible modes of formation in terms of condensation, and partial melting. This work provides a description of the modes of formation and transformation of conglomerates originating from low temperature (<8000C) coal combustion.

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