Hydrogen Sulphide H2S

Only certain industries emit hydrogen sulphide the petrochemistry and paper industries and possibly water purification plants. Except at certain particular sites, the concentration in air is usually low, on the order of one part per million (ppm). 

Hydrogen sulphide has no effect on the atmospheric corrosion of aluminium, whatever its concentration and the level of relative humidity. Laboratory tests have shown that aluminium will not be attacked in air containing up to 5% of H2S at 100% relative humidity [12]. Aluminium resists remarkably well in atmospheres charged with hydrogen sulphide such as the atmosphere close to petrol refineries and petrochemical plants in general. 

---

Corrosion service Carbon dioxide (CO2) or hydrogen sulphide (H2S) in formation tluids will cause rapid corrosion of standard carbon steel and special steel may be required... 

Whereas some atoms have only one valency, others have several, e.g. sulphur has valencies of two, four and six and can form compounds as diverse as hydrogen sulphide, H2S (valency two), sulphur dioxide, SO2 (valency four) and sulphur hexafluoride, SF6 (valency six). Clearly some compounds comprise more than two different elements. Thus hydrogen, sulphur and oxygen can combine to produce sulphuric acid, H2SO4. From the structure it can be seen that hydrogen maintains its valency of one, oxygen two and sulphur is in a six valency state. 

Large quantities of sulphur are recovered from petroleum and natural gas. Naturally occurring hydrogen sulphide, H2S, and that produced in the cracking and catalytic hydrogenation of petroleum is first removed by absorption and the regenerated gas is converted to sulphur by partial combustion with air, the overall reaction being,... 

Most bore waters include high concentrations of at least one of the following chemical contaminants (Table 1) lithium (Li), boron (B as H3BO3), arsenic (As), hydrogen sulphide (H2S), mercury (Hg), and sometimes ammonia (NH3). If released into a river or lake, these contaminants can potentially damage aquatic life, terrestrial plants, and/or human health. The disposal of highly saline bore waters can also have an adverse effect on water quality. 

Paal-Knorr synthesis can also be used to synthesize furan and thiophene ring systems. A simple dehydration of a 1,4-dicarbonyl compound provides the furan system, whereas thiophene or substituted thiophenes can be prepared by treating 1,4-dicarbonyl compounds with hydrogen sulphide (H2S) and hydrochloric acid (HCl). 

Off-gas from the coke burner ( -Gas) contains nitrogen, sulphur dioxide (SO2), hydrogen sulphide (H2S), carbon monoxide (CO), carbon dioxide (CO2), water vapour and other trace contaminants. The -Gas is directed to the CO Boiler for incineration where sulphur compounds are converted to SO2. The Boiler flue gas is passed through electrostatic precipitators for particulate control and then emission to atmosphere. The CO Boiler also serves as the Sulphur Plant tail gas incinerator. Maximum sulphur emissions are 146 tonnes/day or 10.6% of sulphur contained in bitumen feed to the cokers. 

Property Ammonia (NH,) Hydrofluoric acid (HF) Hydrogen sulphide (H2S) Methane (CH ) Water (H20)... 

The same principle can be applied to measuring sulphur that has been converted to hydrogen sulphide (H2S) then oxidised by ozone. 

Hydrogen sulphide (H2S) 5,7 Ankersmit, Tennent and Watts (2005) TRL and UK Highways Authority (Personal Communication) Tetreault (2003) Brimblecombe, Shooter and Kaur (1992) <80ppt clean typical galleries 150ppt Victoria, London (street) 7000 ppt LOAED -1 ngm-3a 1 For of CP 5 years LOAED => [H2S] 1 130 ppt NB with OCS+H2S... 

For example, a cadmium anode in sodium chloride solution yields cadmium chloride by the reaction of the discharged chlorine with the metal, whilst the hydrogen liberated at the cathode reacts with the copper sulphide to form hydrogen sulphide, H2 + CujS = 2Cu + H2S, and the gas precipitates cadmium sulphide. 

Hydrogen sulphide H2S Hydrogen sulphide gas or its saturated solution is used as a precipitant in qualitative inorganic analysis. If oxidizing ions, like Cr202-, MnO, Fe3+, AsO - or substances like HN03 or Cl2 are present, it undergoes oxidation, when elementary S is formed ... 

At least part of the hydrogen sulphide, H2S, was formed in the wine by the reduction of elemental sulphur (Maw 1965 Wainwright 1971 Eschenbruch 1974 SchUtz and Kunkee 1977 Wenzel et al. 1980 Wenzel and Dittrich 1978, 1983 Stratford and Rose 1985 Colagrande et al. 1988 Thomas et al. 1993). Below, we show the mechanism of this reaction starting with elemental sulphur ... 

Ammonia, NH3 Cyanogen, (CN)2 Hydrogen sulphide, H2S Other hydrocarbons, C2H2, CeHe, CioHg, etc. 

Shipulin et al. (1973), in a major article, report the association of sulphur dioxide (SOi), hydrogen sulphide (H2S) and carbonyl sulphide (COS) with mineralisation. The profiles illustrated in that paper are persuasive however, the levels of H S reported are as high as 1% in the soil air at a depth of 1.5-2.0 m. The data must be regarded with some caution as this highly poisonous gas is inimical to virtually all forms of life, including plants, at these concentrations. Furthermore, it is at least one million times the concentration at which H2S is detectable as an odour by humans. This suggests that, if the reports are accurate, then vapour geochemical techniques would have been the oldest-established method of mineral exploration. 

A beautiful blue powder. It is easily attacked by acids, but has considerable resistance to alkalis. It is stable in the sun or in hydrogen sulphide, H2S, and withstands heat. 

The amounts of sulphur ranges from 0.1 to 5.5% by weight. It is rarely present as elemental sulphur, but usually occurs in compounds such as hydrogen sulphide (H2S) and organic sulphur compounds. Sulphur and... 

---