Sentence examples for proportion of methane from inspiring English sources

Environmental groups such as Greenpeace argue that landfill gas systems capture a lower proportion of methane emissions than waste firms claim, and that the liners that keep leachate in landfills are bound to spring leaks sooner or later.

LFGF = proportion of methane produced at landfills with gas collection systems.

O = the proportion of methane oxidized to CO2 by the landfill cover material.

The proportion of methane released through underground ventilation is as high as 70% of all the coal-related emissions.

Theoretically, biogas is a mixture of 60 75% CH4 and 25 40% CO2 with a calorific value of about 20 25 MJ/m3 [27, 45].The processes of digestion and feedstock composition determine the proportion of methane and other gases.

Fractional phase separation would produce a distribution of data points moving (approximately) away from the CH4 apex, consumption of water due to serpentinization would produce a distribution of data points moving away from the H2O apex, and mixing of two aqueous fluids would produce a line parallel to the H2O-NaCl tie-line provided that both fluids contained the same proportion of methane.

For coal gas life cycle, in addition to the 77% contribution from coal power plants and coal gasification plants, the oceanic freighter for coal transport is a critical entity emitting large proportions of methane and pentane.

Different proportions of methane, ethane, propane and ethylene were mixed into the propene flame, with the constant C/O mole ratio and similar maximum flame temperatures and temperature time histories.

In addition, proportions of methane in biogas from pretreated homogenized orange wastes (45% to 68.5%) were lower than that of the pretreated chopped wastes (62.3% to 78.4%) (data not shown).

Owing to ventilation and relatively low pressure at the workface, a proportion of the methane spreads to goafs under the methane pressure in the coal seam and mixes with the methane released by the leftover coal in the goaf, thus entering the workface via carriage by air leakage.

The methane density decreases on the whole, but a proportion of the methane moves back to deep into the goaf.