Thermodynamic Properties of Sulfur Compounds I. Hydrogen Sulfide, Diatomic Sulfur and the Dissociation of Hydrogen Sulfide

1935 ◽  
Vol 3 (3) ◽  
pp. 168-169 ◽  
Author(s):  
Paul C. Cross
Keyword(s):  
Hydrogen Sulfide ◽  
Thermodynamic Properties ◽  
Sulfur Compounds

Formation of sulfur compounds in the hydrodenitrogenation of piperidine, pyridine, 1-pentylamine and 1-pent-4-enylamine on a nickel-tungsten catalyst in the presence of hydrogen sulfide

1982 ◽  
Vol 47 (3) ◽  
pp. 928-935 ◽  
Author(s):  
Mirko Černý
Keyword(s):  
Hydrogen Sulfide ◽  
Reaction Pathway ◽  
Sulfur Compounds ◽  
Degree Of Conversion ◽  
Favourable Effect ◽  
Nitrogen Compounds ◽  
Pure Hydrogen ◽  
Nickel Tungsten

Hydrogenations of piperidine, pyridine, 1-pentylamine, and 1-pent-4-enylamine were carried out in an autoclave at 300°C on a sulfidized nickel-tungsten catalyst using either pure hydrogen or a mixture of hydrogen with hydrogen sulfide. Hydrogen sulfide was found to raise the degree of conversion of the starting substances and accelerate the hydrodenitrogenation by formation of sulfur compounds; 1-pentanethiol, di(1-pentyl)sulfide, 2-methylthiacyclopentane, thiacyclohexane and other sulfur compounds were detected in the reaction mixtures in the presence of hydrogensulfide. A reaction pathway is suggested of the hydrodenitrogenation of piperidine in the presence of hydrogen sulfide, accounting for the favourable effect of the latter on the hydrodenitrogenation of nitrogen compounds.

Deuterium and hydrogen sulfides: vapor pressures, molar volumes, and thermodynamic properties

1970 ◽  
Vol 48 (5) ◽  
pp. 764-775 ◽  
Author(s):  
E. C. W. Clarke ◽  
D. N. Glew
Keyword(s):  
Stainless Steel ◽  
Hydrogen Sulfide ◽  
Thermodynamic Properties ◽  
Vapor Pressure ◽  
Sulfide Liquid ◽  
Standard Thermodynamic Function ◽  
Vapor Pressures ◽  
Molar Volumes ◽  
Enthalpy Changes ◽  
Hydrolysis Of

An apparatus is described in which deuterium and hydrogen sulfides have been prepared by the hydrolysis of aluminum sulfide. Liquid densities have been determined at −79 °C and give the molar volumes 34.811 ± 0.003 cm3 for deuterium sulfide and 34.711 ± 0.003 for hydrogen sulfide. Vapor pressures of deuterium and hydrogen sulfides have been determined at −78 °C in a quartz–metal apparatus, and in the range −30 to +30 °C in a stainless steel apparatus. Equations are derived for the deuterium and hydrogen sulfide vapor pressures and for their ratio. An isotopic vapor pressure cross-over point is found at −48 °C, above which deuterium sulfide is more volatile than hydrogen sulfide. Gas and liquid molar volumes and enthalpy changes are evaluated for liquid vaporization at saturation. The deuterium and hydrogen sulfide vaporization standard thermodynamic function changes and their errors, together with the isotopic differences for these functions and their errors, are tabulated between −80 and +50°C.

scholarly journals The Development of New Methods of Disposal of Processing Sulfur Wastes from a Hydro-carbon Feedstock to various Sulfur Derivatives

2020 ◽  
Author(s):  
Nadezhda Titovna Berberova ◽  
Nadezhda Anatol’evna Pivovarova ◽  
Valentina Nikolaevna Storozhenko ◽  
Elena Vladimirovna Shinkar ◽  
Ivan Vladimorovich Smolyaninov
Keyword(s):  
Hydrogen Sulfide ◽  
Environmental Safety ◽  
Sulfur Compounds ◽  
Low Energy ◽  
Oil Products ◽  
Biologically Active ◽  
New Methods ◽  
Redox Activation ◽  
Hydro Carbon ◽  
Acidic Components

The tendency to reduce the content of sulfur compounds in particular H2S and low molecular thiols (RSH) in oil products sets the task of their extraction and disposal in order to obtain practically useful sulfur compounds. Hydrogen sulfide and thiols can be extracted from hydrocarbon fractions using N-methylpyrrolidone-as selective solvent. Hydrogen sulfide can be extracted from the residual oil products using a low energy exposure such as ultrasound and a constant magnetic field. The releasing gas is concentrated in N-methylpyrrolidone. Further, hydrogen sulfide and mercaptans can be used in the chemical synthesis of biologically active thioethers containing a catechol fragment. Another way of H2S and RSH utilization is the chemical adsorption of acidic components by modified polynuclear pivalate (acetate) zinc(II) silica gel. As a result of the interaction of complexes with H2S and RSH, it is possible to obtain zinc sulfide or zinc thiolates, which can be used in various fields of industry or agriculture. Hydrogen sulfide and thiols can also be applied in the electrochemical or microvaved assisted organic synthesis. This approach is promising from the standpoint of environmental safety of synthesis and low energy costs of the reactions. The SH-functionalization of hydrocarbons (indan, indene, decalin, tetralin, naphthalene and 1,2-dihydronaphthalene) leads to obtain biologically active compounds. Keywords: hydrogen sulfide, thiols, extraction, N-methylpyrrolidone, ultrasonic and magnetic treatment, microwave, redox activation

scholarly journals Formation of Comets: Constraints From the Abundance of Hydrogen Sulfide and Other Sulfur Species

1992 ◽  
Vol 150 ◽  
pp. 459-460
Author(s):  
D. Despois ◽  
J. Crovisier ◽  
D. Bockelee-Morvan ◽  
P. Colom
Keyword(s):  
Hydrogen Sulfide ◽  
Sulfur Compounds ◽  
Sulfur Species

Recent determinations of H2S and other sulfur compounds abundances in comets and in Orion KL bring new tests of the origin of cometary matter.

scholarly journals Inorganic Polysulfides and Related Reactive Sulfur–Selenium Species from the Perspective of Chemistry

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1359 ◽  
Author(s):  
Ammar Kharma ◽  
Marian Grman ◽  
Anton Misak ◽  
Enrique Domínguez-Álvarez ◽  
Muhammad Nasim ◽  
...  
Keyword(s):  
Biological Activity ◽  
Hydrogen Sulfide ◽  
Sulfur Compounds ◽  
Biological Chemistry ◽  
Sulfur Species ◽  
Cellular Processes ◽  
Inorganic Species ◽  
Inorganic Polysulfides ◽  
Inorganic Molecules ◽  
The Relationship

Polysulfides (H2Sx) represent a class of reactive sulfur species (RSS) which includes molecules such as H2S2, H2S3, H2S4, and H2S5, and whose presence and impact in biological systems, when compared to other sulfur compounds, has only recently attracted the wider attention of researchers. Studies in this field have revealed a facet-rich chemistry and biological activity associated with such chemically simple, still unusual inorganic molecules. Despite their chemical simplicity, these inorganic species, as reductants and oxidants, metal binders, surfactant-like “cork screws” for membranes, components of perthiol signalling and reservoirs for inorganic hydrogen sulfide (H2S), are at the centre of complicated formation and transformation pathways which affect numerous cellular processes. Starting from their chemistry, the hidden presence and various roles of polysulfides in biology may become more apparent, despite their lack of clear analytical fingerprints and often murky biochemical footprints. Indeed, the biological chemistry of H2Sx follows many unexplored paths and today, the relationship between H2S and its oxidized H2Sx species needs to be clarified as a matter of “unmistaken identity”. Simultaneously, emerging species, such as HSSeSH and SenS8−n, also need to be considered in earnest.

The loss of volatile sulfur from sheep

1982 ◽  
Vol 33 (3) ◽  
pp. 585 ◽  
Author(s):  
K Kandylis ◽  
AC Bray
Keyword(s):  
Hydrogen Sulfide ◽  
Flow Rate ◽  
Sodium Sulfate ◽  
Sulfur Compounds ◽  
Volatile Sulfur Compounds ◽  
Gas Tight ◽  
Sulfur Balance ◽  
Volatile Sulfur

The losses of volatile sulfur compounds from sheep were investigated with sheep maintained on a high sulfur ration. The sheep were kept in metabolism cages in a 1-m3 gas-tight chamber with air drawn through the chamber and a trapping bath at a flow rate of 15 l/min. After the intraruminal administration of [35S]sodium sulfate, only minor quantities of 35S were found in the trapping bath over the following 8 h. It was concluded that volatile sulfur loss by eructation is negligible in the overall sulfur balance of the sheep. When [35S]hydrogen sulfide was released in the chamber, 50-80% of the 35S was recovered in the trapping bath in the subsequent 6 h.

RESEARCH OF THE PROCESS OF CLEANING BIOGAS FROM SULFUR COMPOUNDS USING THE VORTEX LAYER APPARATUS

2020 ◽  
Vol 4 (41) ◽  
pp. 63-67
Author(s):  
DMITRIY KOVALEV ◽  
◽  
ANDREY KOVALEV
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Sulfide ◽  
Iron Sulfide ◽  
Magnetic Layer ◽  
Sulfur Compounds ◽  
Research Purpose ◽  
Working Chamber ◽  
Vortex Layer ◽  
Information Research ◽  
Ferromagnetic Particles

The use of biogas for the operation of recycling equipment in its pure form is unacceptable due to the high content of sulfur compounds (hydrogen sulfide), which leads to corrosion of metal parts of the equipment contacting with biogas and reduces its service life. The article considers various ways of cleaning biogas from sulfur compounds. (Research purpose) The research purpose is in studying the process of biogas purification from sulfur compounds by sulfonating in the vortex layer apparatus. (Materials and methods) The laboratory of bioenergetic and supercritical technologies of VIM created an experimental device of a vortex magnetic layer. Authors used information research methods, including standard analytical methods of modern system approach, processing and analysis. (Results and discussion) The amount of hydrogen sulfide in the biogas was sharply reduced and when the gas stayed in the working chamber for 5 minutes, it did not exceed 20 parts per million. The concentration of carbon dioxide decreased slightly. The water in the working chamber of the installation serves as a solvent for incoming gases, and the ferromagnetic particles, when worn out, form a fine (20-50 micrometers) iron powder, which reacts chemically with dissolved hydrogen sulfide to form iron sulfide. Fast-rotating ferromagnetic particles create a large contact surface of liquid and gas, which improves the absorption of hydrogen sulfide and carbon dioxide. (Conclusions) It is possible to purify biogas from sulfur compounds by sulfonating in the vortex layer apparatus. The article proposes a method for improving the cleaning process by increasing the pressure and reducing the temperature of water in the working chamber of the vortex layer apparatus.

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