Hydrogen sulfide Hydrogenation

Sulfur (rhombic) Sulfur gas Hydrogen sulfide Hydrogen sulfide Hydrogen sulfide ion (or bisulfide)... 

Absorption of pollutant gases is accomplished by using a selective liquid in a wet scrubber, packed tower, or bubble tower. Pollutant gases commonly controlled by absorption include sulfur dioxide, hydrogen sulfide, hydrogen chloride, chlorine, ammonia, oxides of nitrogen, and low-boiling hydrocarbons. 

Gunina AI. 1957a. The metabolism of hydrogen sulfide (hydrogen sulfide35) injected subcutaneously. Bulletin of Environmental Biology and Medicine 43(2) 176-179. 

Huang C-C, Chu N-S. 1987. A case of acute hydrogen sulfide (hydrogen sulfide) intoxication successfully treated with nitrites. J Formos Med Assoc 86 1018-1020. 

In tracing the evolutionary development of iron ligands it is of interest to examine the machinery employed by organisms which carry out reactions on those substances believed to have been present on the primitive Earth. Specific substrates acted on by this group include, besides ferrous iron itself, hydrogen sulfide, hydrogen gas, methane and reduced nitrogen compounds. Species which perform photosynthesis may be presumed to have the capacity to synthesize protoporphyrin IX since this substance is an intermediate in chlorophyll biosynthesis (43). 

Hydrogen Sulfide. Hydrogen sulfide is a foul-smelling gas that is released into the atmosphere from volcanoes as well as in the course of decay of animal tissues. As an air pollutant, it reacts with almost all metals, with the exception of gold, forming a dark-colored corrosive layer of metal sulfide, commonly known as tarnish, which discolors the exposed surface of most metals. 

National Research Council. Committee on Medical and Biological Effects of Environmental Pollutants Subcommittee on Hydrogen Sulfide Hydrogen Sulfide. University Park Press, Baltimore, MD (1979). 

Hydrogen selenide Hydrogen sulfide Hydrogen peroxide, nitric acid Fuming nitric acid, oxidizing gases, peroxides... 

Concrete corrosion is associated with the formation of hydrogen sulfide. Hydrogen sulfide-induced concrete corrosion has been a well-known major consequence of anaerobic conditions in sewers for many years (Parker, 1945a, 1945b, 1951 Fjerdingstad, 1969 Thistlethwayte, 1972 USEPA, 1974). Concrete corrosion is still a worldwide phenomenon that has great economic impact (Vincke et al., 2000). 

The mngsten ore called scheehte is named after Carl Wilhelm Scheele (1742—1786), who smdied and experimented with tungsten minerals, but as with many of his other near discoveries, such as oxygen, fluorine, hydrogen sulfide, hydrogen cyanide, and manganese, he was not given credit. 

The synthesis and some reactions of meso-ionic 1,2-dithioM-ones (388) have been recently reported. The brown compound 388, R = R = Ph, has been prepared by several methods (i) the reaction betw i l,l,3,3-tetrabromo-l,3-diphenylacetone (PhCBrjCOCBrjPh) and potassium ethyl xanthate, (ii) the reaction between 1,3-diphenyl-propanetrione hydrate and tetraphosphorus decasulfide, (iii) 1,3-diphenylpropanetrione with hydrogen sulfide-hydrogen chloride in ethanol-chloroform yields the salt 389, R = R = Ph, X = Cl, which gives the meso-ionic I,2-dithiol-4-one with triethylamine, pyridine, or aqueous sodium bicarbonate. ... 

Hydrogen Sulfide - Hydrogen sulfide is a commonly occurring decomposition product of organic matter. It is relatively water soluble at higher pHs where it is predominantly dissociated as H+ and S ions. As the pH is decreased below 7, undissociated gas H2S begin to predominate and is released. Since its vapor density is > 1.0, H2S gas tends to settle in low places and creates a toxicity hazard. H2S is readily oxidizable by a number of means to less toxic S03 or S04= forms. 

Cleavage is often associated with elimination of small, stable, neutral molecules, such as carbon monoxide, olefins, water, ammonia, hydrogen sulfide, hydrogen cyanide, mercaptans, ketene, or alcohols, often with rearrangement (Section 2.8). 

One of the more important uses of molybdena catalysts is in hydrodesulfurization processes. In operation, the catalyst is usually presulfided with hydrogen sulfide/hydrogen or other suitable sulfiding agents. Even when presulfiding is not employed, the catalysts become... 

Separation of Hydrogen Sulfide-Hydrogen Mixtures by Heatless Adsorption... 

Stewart and Hack (5.) have presented operating characteristics of pressure swing adsorption systems for reducing impurities in a hydrogen stream from 40 vol percent to 1 ppm. Impurities included ammonia, water, methane, carbon monoxide, carbon dioxide, nitrogen, and several hydrocarbons. In this study heatless adsorption is used to separate hydrogen sulfide-hydrogen mixtures and the experimental results are compared with theoretical models. 

Whitley, M.D., "Separation of Hydrogen Sulfide-Hydrogen Mixtures by Heatless Adsorption", MS Thesis, University of Kentucky, 1975. 

Explosive reactions occur with ammonia, coal-gas, hydrogen or hydrogen sulfide. Hydrogen-containing materials MRH Ammonia 5.52/16,... 

Inorganic gases Oxides of nitrogen Oxides of sulfur Other inorganics Nitrogen dioxide, nitric oxide Sulfuric acid, sulfur dioxide Carbon monoxide, chlorine, ozone, hydrogen sulfide, hydrogen fluoride, ammonia One of the principal pollutants is sulfur dioxide, which is a corrosive acid gas that combines with water vapor in the atmosphere to produce acid rain. 

The reductive process is the more traditional process for tire pyrolysis. This process excludes all sources of oxygen and relies on the reactor heat alone to decompose the tires. Some processors pressurize the reactor with an inert gas such as nitrogen to prevent air from leaking into the reactor, while some inject hydrogen to react with the sulfur present in the rubber in the tires to form hydrogen sulfide. Hydrogen sulfide can be recovered and sold as a by-product. 

Hydrogen Sulfide. Hydrogen sulfide may ignite in contact with barium peroxide.12 Hydroxylamine. Aqueous hydroxylamine ignites on contact with barium peroxide.13 Metals. Powdered aluminum or magnesium ignites on contact with the peroxide.14 Nonmetal Oxides. Barium peroxide incandesces when heated in a stream of C02 or S02.14... 

Write formulas for hydrogen sulfide, hydrogen sulfide ion, and hydrosulfuric acid. 

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