Skip to main content

Hydrogen Sulfide (H2S)

Hydrogen sulfide has a chemical formula as H2S.
H2S is a gas that forms naturally in crude oil, natural gas, and water with high sulfur concentrations (sour water).
  • H2S is soluble in water, and may be released out of the water if there is change in the pH, line pressure, and /or temperature.
  • Some of the process areas may generate potentially fatal concentrations of H2S. These sources could be from raw materials, process reactions, or exposure of materials during a fire.
  • Flare systems handle large volumes of H2S. Any process flare or vent equipment entry could expose personnel to deadly concentrations of H2S.
    Some streams downstream of refineries may also contain potentially fatal concentrations of H2S. (Contact your local facility safety representatives for a list of specific equipment, which may contain H2S)
H2S is a flammable substance, incomplete combustion of H2S may cause the formation of Sulfur Dioxide (SO2). SO2 is also very toxic, and precautions should be taken to avoid exposure.

Characteristics of SO2 include:
-Colorless gas
-Corrosive
-Moderately soluble in water

Exposure to SO2 causes:
-Eye, nose, and throat irritation
-Cough, choking, and decreased respiration
-Forms sulfurous acid upon contact with moisture in mucous membranes

DANGER
EXTREME TOXICITY

  • H2S can kill in seconds at high enough concentrations
  • H2S usually enters the body via the lungs during inhalation of the gas.
  • The toxic effect depends upon–concentration of the gas in the air–duration of exposure.
  • H2S odor becomes detectable in concentrations as low as 0.008 ppm. It has a distinct rotten odor.
  • At as little as 50 ppm, the poison may deaden a persons sense of smell after only 2-15 minutes, making the individual unaware that he or she continues to be exposed to H2S.
  • Therefore, odor MUST NOT BE CONSIDERED AS A SAFE MEANS OF DETECTION.
  • At low levels, eye, nose and throat irritation occurs.
  • Moderate levels can cause headaches, dizziness, nausea and vomiting as well as cough and breathing difficulty.
  • High levels can cause shock, convulsions, coma and death.
Labels:

Comments

Post a Comment

Popular posts from this blog

Removing Iron Rust Using Electrochemical Process

One way to remove iron rust is by electrochemical process. The iron or metal that will be rusted is given a negative charge and the other electrode means that it is positively charged, so the rust will be released from the metal because negative ions will come out of the metal and go to the positive electrode. If the process is continued, the iron may become shiny, not because it is coated in therapy because the surface is partly faded. This is because the iron functions as a negative electrode, where the ions on the surface of the iron will decay and dissolve into the chemical solution. To give an idea of this process, see the following video:
Post a Comment
Read more

Viscose Fiber Production Process

Viscose fiber is a base material for textile industry. The first production of this kind product is in Indian than spread over the Europe and United States also in South Asia Country like in Indonesia. Viscose fiber is produced to anticipate the shortage of natural yarn for raw material to produce yarn in textile industries, beside synthetic yarn as replace natural cotton to produce fabric. This one is a simple drawing of viscose fiber production process . Viscose fiber is used to substitute the using of cotton as raw material for textile industry. Beside of cotton availability will not enough to supply market demand in the future, also cotton just available on harvesting season. If people just depend on cotton to produce textile then people will shortage of raw material to produce textile. Using viscose fiber to fulfill of textile industry will not any shortage raw material, beside the price is lower than cotton, viscose fiber also have better quality compare with synthetic fiber fo
6 comments
Read more

Sodium Sulfite and Sodium Hydrosulfite

Sodium Sulfite Sodium sulfite is a compound that is very easily oxidized. For this reason, it is employed in many cases where a gentle reducing agent is desired, e.g. to bleach wool and silk, as an antichlor after the bleaching of yarns, textile and paper, as a preservative for foodstuffs, and to prevent raw sugar solution from colouring upon evaporation. It is very widely used in the preparation of photographic developer to prevent from oxidation from hydroquinone and other agents. It has a small application in the field of medicine as an antiseptic and as an antizymotic for internal use. About 60% of the total merchant market is in the paper Industries. While merchant capacity is about 145,000 t/year, the paper mills have twice capacity to captive use. The demand for boiler feed water treatment is about 15%. It is use to remove oxygen from water and thus help to prevent corrosion and scale formation. These were four major production in 1891, one of which provided 50% percent of the
4 comments
Read more