Fugitive coal mine methane emissions at five mining areas in China

Su, Shi; Han, Jun; Wu, Jinyan; Li, Hongjun; Worrall, Rhys; Guo, Hua; Sun, Xin; Liu, Wenge

doi:10.1016/j.atmosenv.2011.01.048

Cited by 50 publications

(35 citation statements)

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“…Shale gas is included in (Howarth et al, 2011;NETL, 2014;Weber and Clavin, 2012). A set of emissions factors for coal mines was found for the regions China, OECD Pacific and Economies in Transition (mainly Russia) (Bibler et al, 1998;EPA, 2006;NETL, 2010f;Saghafi, 2012;Su et al, 2011;Sørstrøm, 2001), thus generating at least one dataset for five different regions in the HLCA model. Table 1 shows the regional coverage of the three datasets compiled based on the references consulted.…”

Section: Dataset Assembly Fugitive Emissionsmentioning

confidence: 99%

Multiregional environmental comparison of fossil fuel power generation—Assessment of the contribution of fugitive emissions from conventional and unconventional fossil resources

Bouman

Ramirez

Hertwich

2015

International Journal of Greenhouse Gas Control

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a b s t r a c tIn this paper we investigate the influence of fugitive methane emissions from coal, natural gas, and shale gas extraction on the greenhouse gas (GHG) impacts of fossil fuel power generation through its life cycle. A multiregional hybridized life cycle assessment (LCA) model is used to evaluate several electricity generation technologies with and without carbon dioxide capture and storage. Based on data from the UNFCCC and other literature sources, it is shown that methane emissions from fossil fuel production vary more widely than commonly acknowledged in the LCA literature. This high variability, together with regional disparity in methane emissions, points to the existence of both significant uncertainty and natural variability. The results indicate that the impact of fugitive methane emissions can be significant, ranging from 3% to 56% of total impacts depending on type of technology and region. Total GHG emissions, in CO 2 -eq./kWh, vary considerably according to the region of the power plant, plant type, and the choice of associated fugitive methane emissions, with values as low as 0.08 kg CO 2 -eq./kWh and as high as 1.52 kg CO 2 -eq./kWh. The variability indicates significant opportunities for controlling methane emissions from fuel chains.

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Section: Dataset Assembly Fugitive Emissionsmentioning

confidence: 99%

Multiregional environmental comparison of fossil fuel power generation—Assessment of the contribution of fugitive emissions from conventional and unconventional fossil resources

Bouman

Ramirez

Hertwich

2015

International Journal of Greenhouse Gas Control

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“…The temperature distribution, combustion efficiency, SO 2 , and NOx emissions were studied experimentally. The main conclusions are as follows:…”

Section: Resultsmentioning

confidence: 99%

“…21 Pollutants from co-combustion of CBM and CG mainly include nitrogen oxides (NO x ), sulfur oxides (mainly SO 2 ), and dusts. SO 2 and NO x emissions were primarily considered in this article. 22 …”

Section: Introductionmentioning

confidence: 99%

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Co-utilization of two coal mine residues

Chen

Yang

et al. 2015

Advances in Mechanical Engineering

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In this study, the experiments were carried out in a circulating fluidized bed with different coal bed methane and coal gangue mixing ratios. The results show that bed temperature distribution becomes well-proportioned and the combustion efficiency increases when coal bed methane was introduced. The NO emission increases along with the excess air coefficient rise. The SO 2 emission reduces first and then increases with the rising bed temperature and there is an optimum temperature corresponding to the lowest SO 2 emission. At the same time, the effects of the bed temperature and excess air coefficient on pollutant emissions are more obvious when coal bed methane and coal gangue mixing ratio is less than 0.3. In the experiments, the best operation conditions have been found at coal bed methane and coal gangue mixing ratio of 0.2 and excess air coefficient of less than 1.3. The results show that the co-combustion of coal bed methane and coal gangue in circulating fluidized bed is feasible and provides some references for the combustion optimization.

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“…This demonstrates the importance of obtaining HCDM in methane drainage. The overall utilization rate was approximately 20 % in this coalfield in 2013, which were slightly higher than the average levels for China, but far below the levels of the USA and Australia (Su et al 2011). Here, the overall utilization rate is defined as the percentage of the used methane within the total methane emission, including HCDM, LCDM, and VAM.…”

Section: Methane Drainage and Utilization From 2005 To 2013mentioning

confidence: 97%

Quality and quantity of pre-drainage methane and responding strategies in Chinese outburst coal mines

Zhang

Dai

2016

Arab J Geosci

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Coal and gas outburst and gas explosion are most important coal mine disasters throughout the world. Predrainage is widely accepted and performed to prevent and control methane-related disasters in Chinese outburst mines. Boreholes for pre-drainage are drilled directly into the outburst-prone seams and are theoretically able to capture most of the seam gas that has a high concentration of CH 4 . The methane drainage practice in the Huaibei coalfield suggests that high-outburst mines achieved better efficient during pre-drainage and better effects in methane use than the other outburst mines. This implies that pre-drainage was primarily implemented to eliminate the outburst hazards of outburstprone seams and not to recover methane resource and reduce methane emissions in China. This idea resulted in a greater emphasis on the quantity rather than the quality of predrainage methane, and even the quantity of pre-drainage methane itself was not sufficient in eliminating outburst hazards. This idea and related policies on methane drainage should be transformed urgently. Methane pre-drainage can be greatly improved by making full use of those unavoidable intense boreholes. It is suggested that operating a highefficiency drainage system and developing or popularizing high-efficiency techniques, materials, and equipment for borehole sealing can improve the quality of pre-drainage methane. Simultaneously, extending the pre-drainage time by cooperating with artificial channels can produce the fullest potential of intense boreholes and maximize the quantity of pre-drainage methane. These efforts would benefit the overall mine safety, mine productivity, and methane resource exploitation and usage, as well as the environmental impact, particularly with regard to greenhouse gas emissions.

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Fugitive coal mine methane emissions at five mining areas in China

Cited by 50 publications

References 0 publications

Multiregional environmental comparison of fossil fuel power generation—Assessment of the contribution of fugitive emissions from conventional and unconventional fossil resources

Multiregional environmental comparison of fossil fuel power generation—Assessment of the contribution of fugitive emissions from conventional and unconventional fossil resources

Co-utilization of two coal mine residues

Quality and quantity of pre-drainage methane and responding strategies in Chinese outburst coal mines

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