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The formation conditions of natural gas
Biogenic gas is a prerequisite for the formation of a more abundant organic matter and strong to restore the environment.
Most conducive to angry parent material is an organic herbal humic-type - sapropel humic type organic matter more than those located in the rich Delta land-based sources of material supply and swamp lakeside belt, usually with land-based sources of organic matter in sand and shale series of the most favorable. Sulfuric acid rock is difficult to form a large number of biogenic gas and partly because the sulfuric acid on the production of methane, significant resistance to the role of bacteria, H2 priority to restore the SO42-→ S2-form metal sulfide, or H2S, etc., so CO2 can not be H2 as CH4 reduction . Methane bacteria growth requires an appropriate land-based environment, above all, strong enough to restore the conditions for the general Eh <-300mV is appropriate (ie, formation of oxygen in water and SO42-in turn have all been restored after only a large number of breeding); followed by pairs of required to get near-neutral pH, preferably, generally 6.0 to 8.0, the best value of 7.2 ~ 7.6; Moreover, the methane bacteria growth temperature O ~ 75 ℃, the best value 37 ~ 42 ℃. Without these external conditions, a large number of methane bacteria can not multiply, it will not form a large number of methane gas.
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