scholarly journals Organic sulfur compounds resulting from the interaction of iron sulfide, hydrogen sulfide and carbon dioxide in an anaerobic aqueous environment

1996 ◽  
Vol 26 (2) ◽  
pp. 131-150 ◽  
Author(s):  
Wolfgang Heinen ◽  
Anne Marie Lauwers
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Sulfide ◽  
Iron Sulfide ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Aqueous Environment ◽  
Organic Sulfur Compounds

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.

Organic sulfur compounds from fatty aldehydes, hydrogen sulfide, thiols, and ammonia as flavor constituents

1974 ◽  
Vol 22 (6) ◽  
pp. 1071-1076 ◽  
Author(s):  
Mans. Boelens ◽  
Leendert M. Van der Linde ◽  
Pieter J. De Valois ◽  
Hans M. Van Dort ◽  
Henk J. Takken
Keyword(s):  
Hydrogen Sulfide ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Organic Sulfur Compounds ◽  
Fatty Aldehydes

High Temperature Corrosion By Catalytically Formed Hydrogen Sulfide

CORROSION ◽  
1962 ◽  
Vol 18 (8) ◽  
pp. 291t-298t ◽  
Author(s):  
A. S. COUPER ◽  
ANDREW DRAVNIEKS
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Sulfide ◽  
High Temperature ◽  
Surface Concentration ◽  
High Temperature Corrosion ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Organic Sulfur Compounds ◽  
Steel Surfaces ◽  
Formed Hydrogen

Abstract Organic sulfur compounds are known to be a major cause of high-temperature corrosion in refining processes. Chromium steels are widely used in such environments. The required chromium content for adequate resistance depends upon the chemical form of sulfur encountered. Surfaces of corroding metals can act as catalysts in forming hydrogen sulfide, either from hydrogen and sulfur or by decomposition of organic sulfur compounds. Catalytically formed H2S is more corrosive than the same concentration of other H2S and can be corn-batted by adding chromium to the steel. Because corrosion is proportional to the concentration of H2S, a surface concentration of H2S is postulated as proportional to the catalytic activity of the surface. Laboratory tests on sulfur vapor mixed with hydrogen and on amyl mercaptan mixed with nitrogen or hydrogen indicate that corrosion is proportional to the yield of catalytically formed H2S. Chromium additions to the steel, oxide scales on the metal surfaces, additions of chlorides to the stream, and increased velocity decreased both H2S yields and corrosion, whereas increased temperatures and addition of oxidizing agents caused increases. Further work should be done to develop practical methods to reduce the catalytic activity of corroding steel surfaces, thereby improving corrosion resistance to certain high-temperature streams that contain sulfur compounds. 3.4.2, 4.4.9, 3.5.9, 3.7.2, 8.4.3

scholarly journals Logical-Information Model of Energy-Saving Production of Organic Sulfur Compounds from Low-Molecular Sulfur Waste Fuel Oil

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5286
Author(s):  
Valery Meshalkin ◽  
Elena Shinkar ◽  
Nadezhda Berberova ◽  
Nadezhda Pivovarova ◽  
Foat Ismagilov ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Technological Process ◽  
Energy Resource ◽  
Sulfur Compounds ◽  
Fuel Oil ◽  
Alternative Methods ◽  
Organic Sulfur ◽  
Resource Saving ◽  
Technological Processes ◽  
Organic Sulfur Compounds

A logical-informational model of energy resource-efficient chemical technology for the utilization of hydrogen sulfide and low molecular alkanethiols, which are toxic and difficult to remove sulfur components of residual fuel (fuel oil), is proposed. Based on the IDEF1 methodology and existing knowledge about the technological processes of the demercaptanization of various hydrocarbon raw materials (oils, gas condensates), a scheme for the production of organic sulfur compounds from sulfur waste extracted from fuel oil has been modeled. For a sufficiently complete removal of hydrogen sulfide and low molecular weight alkanethiols, energy- and resource-saving stages of the technological process have been developed, which are implemented by ultrasonic and/or magnetic treatment of fuel oil. It is proposed to use the combined action of two alternative methods of processing fuel oil to increase the efficiency of cleaning fuel oil from sulfur components. For the first time, an approach has been developed to utilize unwanted sulfuric impurities contained in fuel oil by involving electric and microwave synthesis in green technological processes, to obtain practically useful organic sulfur compounds with biological activity. It is shown that the use of one-electron oxidant thiols and hydrogen sulfide in organic media leads to the synthesis of organic disulfides and elemental sulfur. Indirect (with the use of mediators) electrosynthesis contributes to the cyclic conduct of the technological process, an increase in efficiency and a decrease in energy consumption compared to the direct (on electrodes) initiation of sulfur components.

Relationship between Molecular Structures of Organic-Sulfur Compounds and Metal Forming Performance

2016 ◽  
Vol 716 ◽  
pp. 190-198 ◽  
Author(s):  
Tomohiro Takaki ◽  
Shogo Ito ◽  
Kazuhiko Kitamura ◽  
Kazuhiro Yagishita ◽  
Junichi Shibata
Keyword(s):  
Stainless Steel ◽  
Photoelectron Spectroscopy ◽  
High Performance ◽  
Iron Sulfide ◽  
Sulfur Compounds ◽  
Molecular Structures ◽  
Organic Sulfur ◽  
Cold Forming ◽  
Organic Sulfur Compounds ◽  
Fatty Oil

Oil with a chlorinated extremely-pressure additive (EP-additive) is effective to prevent galling in cold forming for stainless steel. However environmental issues have pressured the manufacture to replace this oil with high performance oil without chloride. Particularly, sulfur-based EP-additives are accepted as a practicable replacement for chlorinated EP-additives. Thus, the authors analyzed the structures of organic-sulfur compounds. Moreover, the effects of the molecular structures on the anti-galling performance are estimated by a cup internal ironing test. This test has been devised to classify the performance of sample oils by the ironing load and the damage on the workpiece after the test. Consequently, sulfurized olefin was superior to sulfurized ester and sulfurized fatty oil in cold ironing for stainless steel. It was also clarified that sulfur EP-additives generated iron sulfide and sulfate on the surface of stainless steel by using the surface analyses of X-ray photoelectron spectroscopy.

Sign in / Sign up

Export Citation Format

Share Document