Word Finder - methane

definition

The simplest aliphatic hydrocarbon, CH₄, being a constituent of natural gas, and one of the most abundant greenhouse gases.

example

Cattle emit a large amount of methane.

synonyms

• carbon tetrahydride
• methyl hydride

definition

Any of very many derivatives of methane.

In methane, CH 4, the hydrogen atoms are of equal value, and hence only one alcohol, viz.

Methane is a natural gas created in several ways.

Prior to 1830, little was known of the process other than that organic compounds generally yielded tarry and solid matters, but the discoveries of Liebig and Dumas (of acetone from acetates), of Mitscherlich (of benzene from benzoates) and of Persoz (of methane from acetates and lime) brought the operation into common laboratory practice.

The hydrocarbon methane, CH 4, when completely burned to carbon dioxide and water, generates 213800 cal.

The quinonoid structure of many coloured compounds has been proved experimentally, as, for example, by Hewitt for the benzene-azo-phenols, and Hantzsch for triaminotriphenyl methane and acridine derivatives; but, at the same time, many substances cannot be so explained.

Methane and its homologues give origin to the " paraffin " or " fatty series " of the general formula C,H 2, ,+ 1 000H, ethylene gives origin to the acrylic acid series, C n H 27, - 1 000H, and so on.

Massive volumes of methane would immediately rise through the ocean and "erupt" at the surface of the water.

A mixture of carbon bisulphide vapour and sulphuretted hydrogen, when passed over heated copper, gives, amongst other products, some methane.

This compound may be considered as derived from methane, CH 4, by replacing a hydrogen atom by the monovalent group CH 3, known as methyl; hence ethane may be named " methylmethane."

The gaseous mixture obtained by burning guncotton in a vacuum vessel contains steam, carbon monoxide, carbon dioxide, nitrogen, nitric oxide, and methane.

Considering the predicted series of compounds C7,H2,,+2, which is the well-known homologous series of methane, the first member, the possible of isomerism lies in that of a different linking of the carbon atoms. This first presents itself when four are present, i.e.

Like aluminium carbide it is slowly decomposed by water with the production of methane.

Similarly nascent methane may reduce iron salts, and the black mud in which these bacteria often occur owes its colour to the FeS formed.

The methane would also rise up into the air above that area of the ocean.

Molten copper absorbs carbon monoxide, hydrogen and sulphur dioxide; it also appears to decompose hydrocarbons (methane, ethane), absorbing the hydrogen and the carbon separating out.

Landfills are expensive to operate and require aftercare for many years following closure, in order to monitor leachate and gases such as methane.

Biological production of methane up to now was considered only to occur under strictly anaerobic conditions.

The reaction is a substitution reaction; a hydrogen atom of methane is swapped for a chlorine atom.

Engines fuelled by methane biogas or gases from old coal mines normally cease to function if the methane concentration drops below 40 per cent.

Seventy-two soldiers of the East India Company die as a result of methane poisoning and third-degree ammonia burns.

Grow the plants, cut them down, anaerobically digest them to produce methane and good quality compost.

Such engines are sometimes run partly on the gas (mostly methane) from the sludge digestion tanks.

When sunlight strikes methane molecules they react to form ethane molecules they react to form ethane.

It is believed Titan could be home to oceans and streams of liquid ethane and methane.

Last July, more than 30 were killed in a methane explosion in Donetsk region, the heart of Ukraine's coal-producing area.

Methane emissions are estimated for biomass burning, enteric fermentation and irrigated agriculture.

A paper describing an experimental and modeling study of low pressure sulfur and nitrogen doped premixed methane flames has been published.

Test drilling in the area revealed evidence of an abundance of methane hydrate just waiting to burst free of its watery confines.

The release of methane into the atmosphere explains the sudden shift in carbon isotopes.

What about reports recently that trees emit methane which is more damaging to the environment than CO 2?

If sunlight is continuously destroying methane on Titan, how is methane getting into the atmosphere?

Of these, all except one were targeted at coalbed methane or mines gas, illustrating the continued interest in these gas resources.

In the past two centuries the concentration of atmospheric methane has more than doubled.

These boulders are thought to slow the flow of liquid methane from the west.

Molecular Ecology of Methane oxidation We have been developing molecular biology techniques to study the ecology of methane oxidation We have been developing molecular biology techniques to study the ecology of methane oxidizers.

They were also, sensibly, keen on coal-bed methane sequestration.

Just under half the blocks awarded for license had a coal bed methane or vent gas focus.

Cattle produce a large amount of the potent greenhouse gas methane in their stomachs.

In addition, Alkane has an attractive pipeline of coal mine methane sites to exploit in the UK to provide organic growth.

We are also investigating anaerobic methane oxidation using conventional and molecular techniques.

Here we are trying to maintain a methane oxidation mechanism that is always up-to-date.

Produced by smoldering fires, carbon monoxide reduces concentrations of reactive atmospheric chemicals called hydroxyl radicals that remove methane from the air.

Large quantities of MDAC indicate that methane seepage has occurred over a prolonged period of time.

Anyway, landfill sites release a large amount of methane, a greenhouse gas which contributes to climate change.

The gases normally present in the gastrointestinal tract are oxygen, carbon dioxide, nitrogen, hydrogen, methane, and hydrogen sulfide.

Titan's atmosphere contains an abundance of methane, which was detected many years ago by spacecraft that flew past the planet.

Equally well we may derive it from methane by replacing a hydrogen atom by the monovalent group CH 2 CH 31 named ethyl; hence propane may be considered as " ethylmethane."

Further, since methane may be regarded as formed b y the conjunction of a methyl group with a hydrogen atom, it may be named " methyl hydride "; similarly ethane is " ethyl hydride," propane, " propyl hydride," and so on.

Tully and now in use at Truro, in which tar is injected into the incandescent fuel in a water-gas generator and enriches the water gas with methane and other hydrocarbons, the resulting pitch and carbon being filtered off by the column of coke through which the gas passes.

Methane, Mr Macclesfield 's own super hero who can supply tuneful rectal rasps at will.