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Frontiers of Environmental Science & Engineering

ISSN 2095-2201

ISSN 2095-221X(Online)

CN 10-1013/X

Postal Subscription Code 80-973

2018 Impact Factor: 3.883

Front Envir Sci Eng    2013, Vol. 7 Issue (1) : 66-76    https://doi.org/10.1007/s11783-012-0428-5
RESEARCH ARTICLE
Emission factors of gaseous carbonaceous species from residential combustion of coal and crop residue briquettes
Qin WANG1, Chunmei GENG2, Sihua LU1, Wentai CHEN1, Min SHAO1()
1. State Joint Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; 2. Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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Abstract

Experiments were performed to measure the emission factors (EFs) of gaseous carbonaceous species, such as CO2, CO, CH4, and non-methane volatile organic compounds (NMVOCs), from the combustion of five types of coal of varying organic maturity and two types of biomass briquettes under residential burning conditions. Samples were collected in stainless steel canisters and 2,4-dinitrophenylhydrazine (DNPH) cartridges and were analyzed by GC–FID/MS and HPLC, respectively. The EFs from crop residue briquette burning were generally higher than those from coals, with the exception of CO2. The dominant NMVOC species identified in coal smoke were carbonyls (41.7%), followed by C2 unsaturated hydrocarbons (29.1%) and aromatics (12.1%), while C2 unsaturated hydrocarbons were the dominant species (68.9%) emitted from the combustion of crop residue briquettes, followed by aromatics (14.4%). A comparison of burning normal crop residues in stoves and the open field indicated that briquettes emitted a larger proportion of ethene and acetylene. Both combustion efficiency and coal organic maturity had a significant impact on NMVOC EFs from burning coal: NMVOC emissions increased with increasing coal organic maturity but decreased as the combustion efficiency improved. Emissions from the combustion of crop residue briquettes from stoves occurred mainly during the smoldering process, with low combustion efficiency. Therefore, an improved stove design to allow higher combustion efficiency would be beneficial for reducing emissions of carbonaceous air pollutants.

Keywords residential combustion      coal      crop residue briquette      emission factors      gaseous carbonaceous species     
Corresponding Author(s): SHAO Min,Email:mshao@pku.edu.cn   
Issue Date: 01 February 2013
 Cite this article:   
Chunmei GENG,Sihua LU,Wentai CHEN, et al. Emission factors of gaseous carbonaceous species from residential combustion of coal and crop residue briquettes[J]. Front Envir Sci Eng, 2013, 7(1): 66-76.
 URL:  
https://academic.hep.com.cn/fese/EN/10.1007/s11783-012-0428-5
https://academic.hep.com.cn/fese/EN/Y2013/V7/I1/66
coalbiomass briquette
DTDSYCZJJXpeanut shellmaize straw
proximate analysis
moisture (wt.%)6.987.461.30.943.027.837.5-8.5
ash (wt.%)9.56.6823.289.0826.341.66-10
volatile matter (wt.%)32.0730.8219.745.764.4469.160-70
fixed carbon (wt.%)51.4555.0455.6884.2266.222.4210-12
low heat value (MJ·kg)26.1927.5119.5131.2322.7315.4815.48
ultimate analysis
sulfur (wt.%)0.210.20.362.240.250.070.3-0.35
carbon (wt.%wt.%)64.668.7262.6881.8668.26
hydrogen (wt.%)3.563.762.162.760.79
nitrogen (wt.%)0.840.90.621.040.26
oxygen (wt.%)14.3112.289.62.081.08
Tab.1  Properties of fuels tested in this study (on an air-dried basis)
Fig.1  The dilution tunnel system
Fig.1  The dilution tunnel system
Alkanes(26)Alkenes & Acetylenes(14)Aromatics(14)Carbonyls(24)Halocarbons & sulfur-containing compounds(6)
ethaneethenebenzeneformaldehydeCH3Cl
propanepropenetolueneacetaldehydeCH3Br
n-butaneacetyleneethylbenzeneacroleinCH3I
i-butane1-butenem/p-xyleneacetone1,2-dichlroethane
isopentaneiso-buteneo-xylenepropanalDMS
n-pentane1,3-butadienestyrenecrotonaldehydeCS2
2,2-dimethylbutanetrans-2-buteneisopropylbenzenemethyl vinyl ketone
2,3-dimethylbutanecis-2-butenepropylbenzenemethacrolein
2-methylpentane1-pentenem-ethyltoluene2-butanone
cyclopentanetrans-2-pentenep-ethyltoluenebutanal
3-methylpentane2-methyl-1-butene1,3,5-trimethylbenzenebenzaldehyde
n-hexanecis-2-penteneo-ethyltolueneglyoxal
methylcyclopentaneisoprene1,2,4-trimethylbenzenei-valeraldehyde/cyclohexanone
2-methylhexane1-hexene1,2,3-trimethylbenzenevaleraldehyde
2,3-dimethylpentaneo-tolualdehyde
cyclohexanem-tolualdehyde
3-methylhexanep-tolualdehyde
2,2,4-trimethylpentanemethylglyoxal
heptanehexanal
methylcyclohexane2,5-dimethylbenzaldehyde
2,3,4-trimethylpentaneheptanal
2-methylheptaneoctanal
3-methylheptanenonanal
n-octanedecanal
n-nonane
undecane
Tab.2  The VOC species quantified in this study
Fig.2  Comparison of emission factors (s) for gaseous carbonecous species from the burning of coal and crop residue briquettes
Fig.2  Comparison of emission factors (s) for gaseous carbonecous species from the burning of coal and crop residue briquettes
Fig.3  The measured emission factors (s) of coal (a) and crop residue (b) combustion in stoves compared with results of pevious studies
Fig.3  The measured emission factors (s) of coal (a) and crop residue (b) combustion in stoves compared with results of pevious studies
Fig.4  Chemical composition of NMVOCs from selected combustion sources. The source profiles of residential coal and crop residue briquettes combustion were those determined in the present study. Profiles for crop residues in stove and open burning, fire wood, meat charbroiling, and vehicles were obtained from Andreae et al. [], McDonald et al.[], Schauer et al. [], and Ho et al.[,]
Fig.4  Chemical composition of NMVOCs from selected combustion sources. The source profiles of residential coal and crop residue briquettes combustion were those determined in the present study. Profiles for crop residues in stove and open burning, fire wood, meat charbroiling, and vehicles were obtained from Andreae et al. [], McDonald et al.[], Schauer et al. [], and Ho et al.[,]
coalcrop residue briquettes
VOC speciesEF/(mg·kg-1)EF/(mg·MJ-1)percentage /%VOC speciesEF/(m g·kg-1)EF/(mg·MJ-1)percentage/%
ethene68.32.8119.2ethene30207195149.3
formaldehyde41.91.8711.8acetylene1142273718.6
acetone35.71.4010.1benzene59123829.6
acetylene29.91.248.4ethane55113569.0
ethane26.31.187.4toluene19121243.1
benzene21.450.906.0propene16961102.8
acetaldehyde18.90.875.3methyl chloride57337.00.9
propene10.050.432.8acetaldehyde51333.10.8
butanal9.380.382.6styrene37224.00.6
toluene7.420.322.11,3-butadiene34822.50.6
nonanal6.190.251.7propane34622.40.6
benzaldehyde5.070.231.51-butene29218.80.5
2-butanone4.450.211.3formaldehyde29118.80.5
total285.012.080.3total59396383796.4
Tab.3  The 13 most abundant VOC species and their contributions to total VOCs emissions following combustion of residential coal and crop residue briquettes
Fig.5  Emission factors (s) of TNMVOCs (a) versus modified combustion efficiency (MCE) and volatile matter content of coal (b). The correlation coefficient is given by
Fig.5  Emission factors (s) of TNMVOCs (a) versus modified combustion efficiency (MCE) and volatile matter content of coal (b). The correlation coefficient is given by
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