"Spontaneous combustion" of oil-based wood finishing products: Hidden or obvious hazard?

Abstract The paper addresses an electro-chemical method called wet oxidation potential technique for determining the susceptibility of coal to spontaneous combustion. Altogether 78 coal samples collected from thirteen different mining companies spreading over most of the Indian Coalfields have been used for this experimental investigation and 936 experiments have been carried out by varying different experimental conditions to standardize this method for wider application. Thus for a particular sample 12 experiments of wet oxidation potential method were carried out. The results of wet oxidation potential (WOP) method have been correlated with the intrinsic properties of coal by carrying out proximate, ultimate and petrographic analyses of the coal samples. Correlation studies have been carried out with Design Expert 7.0.0 software. Further, artificial neural network (ANN) analysis was performed to ensure best combination of experimental conditions to be used for obtaining optimum results in this method. All the above mentioned analysis clearly spelt out that the experimental conditions should be 0.2 N KMnO4 solution with 1 N KOH at 45°C to achieve optimum results for finding out the susceptibility of coal to spontaneous combustion. The results have been validated with Crossing Point Temperature (CPT) data which is widely used in Indian mining scenario.

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Effect Analysis of Nitrogen Injection on the Variation of “Oxidation Zone” in Coal Mine Gob Based on Numerical Simulation

The Open Fuels & Energy Science Journal ◽

10.2174/1876973x01609010047 ◽

2016 ◽

Vol 9 (1) ◽

pp. 47-54

Author(s):

Jing Shen ◽

Mingran Chang

Keyword(s):

Numerical Simulation ◽

Coal Mine ◽

Heat Dissipation ◽

Spontaneous Combustion ◽

Oxidation Zone ◽

Effect Analysis ◽

Mine Fire ◽

Nitrogen Injection ◽

The Difference ◽

Residual Coal

One of the main reasons for coal mine fire is spontaneous combustion of residual coal in gob. As the difference of compaction degree of coal and rock, the underground gob can be considered as a porous medium and divided into “three zones” in accordance with the criteria. The “three zones” are “heat dissipation zone”, “oxidation zone” and “choking zone”, respectively. Temperature programming experiments are taken and numerical simulation with obtained experimental data is utilized to analyze the distribution of “three zones” in this paper. Different width and depth of “oxidation zone” are obtained when the inlet air velocity is changed. As the nitrogen injection has inhibition effect on spontaneous combustion of residual coal in gob, nitrogen is injected into the gob. The widths of “oxidation zone” are compared before and after nitrogen injection. And ultimately the optimum location and volume of nitrogen injection are found out.

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Wieland; or The Transformation, and Memoirs of Carwin, The Biloquist

10.1093/owc/9780199538775.001.0001 ◽

2009 ◽

Author(s):

Charles Brockden Brown

Keyword(s):

New York ◽

Spontaneous Combustion ◽

The Novel ◽

Small Community ◽

Actual Case ◽

Her Family ◽

American Novels

One of the earliest American novels, Wieland (1798) is a thrilling tale of suspense and intrigue set in rural Pennyslvania in the 1760s. Based on an actual case of a New York farmer who murdered his family, the novel employs Gothic devices and sensational elements such as spontaneous combustion, ventriloquism, and religious fanaticism. The plot turns on the charming but diabolical intruder Carwin, who exercises his power over the narrator, Clara Wieland, and her family, destroying the order and authority of the small community in which they live. Underlying the mystery and horror, however, is a profound examination of the human mind's capacity for rational judgement. The text also explores some of the most important issues vital to the survival of democracy in the new American republic. Brown further considers power and manipulation in his unfinished sequel, Memoirs of Carwin the Biloquist, which traces Carwin's career as a disciple of the utopist Ludloe.

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