Methane + hydrogen sulfide

In continually submerged soils, there is no oxygen. Thus, the entire environment is anaerobic and reducing. Under these conditions, there will be a predominance of the reduced forms mentioned earlier, namely, methane, hydrogen sulfide, ferrous iron, and so on. 

The first major source of recovered sulfur from H2S containing natural gas was the Lacq field in southern France developed by SNPA in the mid 1950 s. This 15% H2S containing gas stream was the forerunner of many subsequent sour gas developments around the world. In the early days of sour gas production the major product sought after was the methane hydrogen sulfide and... 

The phase equilibria data for binary guest mixtures are listed under the lighter component. For example, under the heading of binary guest mixtures of methane will be found data for methane + ethane, methane + propane, methane + isobutane, methane + n-butane, methane + nitrogen, methane + carbon dioxide, and methane + hydrogen sulfide. Concentrations are in mole percent or mole fraction in the gas phase, unless otherwise indicated. 

Hydrate Methane + hydrogen sulfide Reference Noaker and Katz (1954) Phases Lw-H-V... 

Binary Mixtures of Methane + Hydrogen Sulfide with Inhibitors... 

Kohn, J.P. and Kurata, F. 1958. "Heterogeneous Phase Equilibria of the Methane-Hydrogen Sulfide System", AlChE /., 4 211-216. 

Reamer, H.H., B.H. Sage, and W.N. Lacey. 1951a. "Phase Equilibria in Hydrocarbon Systems. Volumetric and Phase Behavior of the Methane-Hydrogen Sulfide System", Ind. Eng. Chem., 43 976-981. 

Chemistry, isotopic composition, and origin of a methane-hydrogen sulfide hydrate at the Cascadia subduction zone. Earth and Planetary Science Letters, 156 173-183. 

Calculations All gas measurements are reported at 60 °F. and 760 mm. mercury pressure. The hydrogen feed rate of 12,000 cu. ft. per barrel was 1.1 times the stoichiometric amount of about 10,890 cu. ft. needed to convert the crude oil completely to methane, hydrogen sulfide, ammonia, and water. The yield of methane as volume percent of stoichiometric was calculated by dividing the volume in cubic feet per barrel by 8740, which was the stoichiometric yield at the given conditions. 

When both acidic and anaerobic conditions prevail, as occurs in many peat bogs prior to drainage and cultivation, almost all decomposition can be stopped. In such cases the constant formation of organic acids and other end products of anaerobic decomposition, such as methane, hydrogen sulfide and hydrogen, suppress the growth of nearly all... 

Oil well sour gas (methane, hydrogen sulfide, carbon dioxide, and... 

Koim, J.P., and F. Kurata, Heterogeneous I%ase Equilibria of the Methane-Hydrogen Sulfide System, AIChE J., 4(2), 211(1958). 

The most complicated tunnel conditions were observed within the zones of biochemical gas generation from the Mikulinsky bituminous clay layers (Dashko, 2008). As is seen in Figure 7, the thickness of the bituminous clay layer nearly station Obukhovo is about 28 m. High compound of bituminous organic (up to 20% and more) in this layer predetermines the intensity of biochemical processes caused by microorganisms that lead to production of such gases as methane, hydrogen sulfide, carbon dioxide and others. The maximum yield of gas, measured in boreholes, was about 37 mVday. 

In Equation 8.68, the plus sign concerns the case when volatile substance is transferred from aqueous phase into the bubble volume and the minus sign concerns the case when the diffusion of volatile substance occurs in opposite direction. And the concentration gradient has the plus sign when the process of water degassing is analyzed (i.e., the evolution of chlorine, chloroform, ammonia, methane, hydrogen sulfide, and other gases analyzed, if their concentration in air is considerably lower than that in aqueous phase). 

Figure 5. Predicted and experimental K-values for the methane-hydrogen sulfide system at 40°F...

Oxygen Nitrogen Hydrogen Carbon monoxide Carbon dioxide Methane Hydrogen sulfide Sulfur dioxide Carbon (graphite) Diatomic sulfur Nitric oxide Carbonyl sulfide Hydrogen cyanide Ammonia Nitrous oxide... 

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