Table of Contents
What gas is responsible for most of the explosion in coal mines?
There are two main types of coalmine explosions: methane and coal dust. Methane explosions occur when a buildup of methane gas contacts a heat source and there is not enough air to dilute the gas level below its explosion point.
Which gas is most explosive?
Some of the most prevalent explosive gases used in manufacturing are Hydrogen, Oxygen, Methane, and Acetylene. Oxygen is not flammable itself, but it can still lead to explosive accidents by igniting other materials that wouldn’t be flammable in a less oxygenated environment.
Which common gases are often found in coal mines following a fire or explosion?
Some of the more common gases encountered are methane, carbon dioxide (CO2), carbon monoxide (CO), oxides of nitrogen (NO, NO2), hydrogen sulphide (H2S) and sulphur dioxide(SO2). Methane is the most common combustible (explosive) gas. It is lighter than air, odourless and explodes at concentrations between 5% and 15%.
Which of the following gases are found in coal mines?
Methane gas accumulates in “pockets” of the coal and adjacent strata naturally over millions of years and can be released as the coal is mined. As the pockets are penetrated by the mining machinery the gas seeps into the pit where explosive mixtures of methane can form. Methane has a density relative to air of 0.55.
What causes explosions in mines?
Explosions in underground mines and surface processing facilities are caused by accumulations of flammable gas and/or combustible dust mixed with air in the presence of an ignition source.
Which gas is obtained when coal is heated in absence of air?
Coal gas, gaseous mixture—mainly hydrogen, methane, and carbon monoxide—formed by the destructive distillation (i.e., heating in the absence of air) of bituminous coal and used as a fuel. Sometimes steam is added to react with the hot coke, thus increasing the yield of gas. Coal tar and coke (qq.
Which gas is most commonly burned for fuel in a home?
natural gas
Methane. Methane, often sold under the name natural gas, is used primarily as a residential and commercial heating fuel. Because methane is explosive when present in the air, leaks of natural gas are dangerous.
At what percentage CO becomes explosive?
What is the explosive range of carbon monoxide-air mixtures? 12.5 to 74 percent carbon monoxide in air.
What is the formula of coal gas?
CH4+H2+CO.
How many types of coal gas are there?
Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite.