occurrence of petroleum gas

Petroleum occurs in nature, trapped between two layers of impervious (non-porous) rocks, usually under the sea. Natural gas collects above the surface of petroleum..

It is the most important of the fossil fuels. Petroleum occurs under the Earth's crust. It is believed to have formed due to the bacterial action of decomposition on marine animals and prehistoric forests inside the Earth, under conditions of high temperature and pressure. Petroleu..

Petroleum is brought to the surface by drilling a hole in the Earth's crust and sinking pipes deep down through the impervious cap rock. Natural gas first comes out under high pressure. Then, petroleum is pumped out, collected in tanks and transported, for further pro..

Petroleum gas a by-product from two sources: natural gas processing and crude oil refining is a mixture of butane, propane and ethane. The main constituent of liquefied petroleum gas is, however, propane, propylene, butane, butylene in various mixt..

Composition of LPG - Butane with small quantities of ethane and propane. These gases can be liquified under pressure and bottled in cylinders. By itself LPG is odourless. On leakage, it is toxic if inhaled. It also forms an explosive mixture with air. LPG can be hazardous if handled carelessly. A s..

Noble gases always occur in free state because of their inert nature. All the noble gases, except radon are present in air in small amounts. The relative abundance of the noble gases in air is = 1%. Helium is present in natural gas up to the extent of 10 per cent. It is also present in sm..

Methane occurs in: Natural gas Marshy areas where plant matter rots and decomposes. (paddy fields, stagnant ponds) Coal mines Bodies of termites (cellulose digesting insect) Intestines of ruminating animals (animals that chew the cud e.g., cows) Constituent of biogas..

In free state, sulphur occurs in the volcanic regions of Sicily, Italy, South America, Japan and Russia. The largest deposits of sulphur have been found in Louisiana and Texas (USA). In combined state, sulphur occurs mainly as the sulphides and sulphates. Sulphides Sulphates Iron pyr..

In countries, where coal is easily available as compared to the rapidly depleting petroleum and natural gas, it is possible to avert the energy crisis by preparing petroleum and natural gas artificial..

Fossil fuels, like, coal, lignite, petroleum and natural gas are non renewable natural resource..