Equivalent Oxidation Exposure - Time for Low Temperature Spontaneous Combustion of Coal

Sasaki, Kyuro; Sugai, Yuichi

doi:10.5772/20308

Cited by 9 publications

(10 citation statements)

References 12 publications

(19 reference statements)

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“…Sasaki and Sugai [13] state that coal exposed to air is oxidized via adsorbed oxygen. The adsorption rate of oxygen decreases with increasing time for a constant temperature, because coal has a limit for oxygen consumption.…”

Section: Rate Equations For Fresh Coal Oxidation At Low Temperaturesmentioning

confidence: 99%

See 1 more Smart Citation

Reaction kinetics of coal oxidation at low temperatures

Arısoy

Beamish

2015

Fuel

103

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Section: Rate Equations For Fresh Coal Oxidation At Low Temperaturesmentioning

confidence: 99%

“…For this purpose they introduced the concept of ''Equivalent Oxidation Exposure Time'' [13]. EOE is a function of time, EOE = f(t).…”

Section: Rate Equations For Fresh Coal Oxidation At Low Temperaturesmentioning

confidence: 99%

Reaction kinetics of coal oxidation at low temperatures

Arısoy

Beamish

2015

Fuel

103

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“…The maximum ambient concentrations of pollutants measured close to this point were 234 ppm for VOCs, 300 ppm CO, 17.9 ppm SO 2 , 4 ppm NO, 3.6 ppm H 2 S, 2 ppm NH 3 , and 3 ppm HCN. The internal spontaneous combustion of the coalmine waste heap as well as the formation of cracks can be explained by coal-oxygen compound theory (Sasaki & Sugai, 2011;Zhu et al, 2018). First, due to the poor soil coverage discussed above, oxygen from the atmosphere can still interact with the outside surface of the coal-mine waste heap and that oxygen diffuses inward to the center of the heap (Guo, Yan, et al, 2019;Wen et al, 2017).…”

Section: 1029/2020gh000249mentioning

confidence: 99%

Community Citizen Science for Risk Management of a Spontaneously Combusting Coal‐Mine Waste Heap in Ban Chaung, Dawei District, Myanmar

Phenrat

2020

GeoHealth

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Since 2015, a large heap of improperly disposed coalmine waste in Ban Chaung, Dawei district, Myanmar, has repeatedly spontaneously combusted, affecting an indigenous community. Recently, the regional Myanmar government has compelled the mine to properly manage the mine waste heap, but there is no opportunity for affected villagers to participate. This study empowers the affected villagers to make risk management decisions via a community citizen science approach. First, field investigations were performed with the affected community to identify hot spots at the waste heap releasing gaseous pollutants that may exceed acceptable levels. Next, existing monitoring data previously collected by the community were interpreted as clear evidence of past poor waste management. Information about suppression of existing fire and mine waste storage options was presented to the community for them to make an informed decision about the most appropriate corrective action that should be taken by the mine. The mining company chose to use surface sealing for both suppression of existing fire and on-site storage of the mine waste but did not install any long-term monitoring system. Nevertheless, the community's choice was surface sealing with preventive monitoring together with emergency response, which is the more scientifically appropriate option. This outcome of a science-based risk management decision by the community will be forwarded to the regional government for enforcement. This process of community citizen science is in line with the normative rationale of public participation, which is meant to influence decisions, elevate democratic capacity, and empower marginalized individuals and communities.

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“…Spontaneous combustion of coal has been a major problem for the industry (both coal producers and consumers), human health and the environment worldwide. Coal is a carbonaceous rock composed of combustible material of carbonized organic matter that may be oxidized at different conditions, especially when it comes into contact with the atmosphere and moisture (Avila et al 2014;Pone et al 2007;Sasaki and Sugai 2011). Put in simple terms, the combustible nature of coal arises from its formation processes in which, during the carboniferous period, the plant's biomass underwent burial metamorphism in anaerobic and aquatic environments (Speight 2005).…”

Section: Introductionmentioning

confidence: 99%