iron sulfide in ashphalt

How do pyrite and pyrrhotite damage building foundations ...

Pyrite and pyrrhotite are minerals known as iron sulfides. When iron sulfides are exposed to water and oxygen, a series of chemical reactions breaks down the iron sulfides and forms new minerals called sulfates. These sulfates take up more space than the original iron sulfides. As they grow, the new sulfate minerals push against the surrounding rock, causing it to swell and crack.

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Pyrophoric Iron Fires - Safety and Pressure Relief ...

Most commonly, pyrophoric iron fires occur during shutdowns when equipment and piping are opened for inspection or maintenance. Instances of fires in crude columns during turnarounds, explosions in sulfur, crude or asphalt storage tanks, overpressures in vessels, etc., due to pyrophoric iron …

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Rust Stains in Your Driveway - Jet-Seal Sealcoating ...

Jul 08, 2019· Asphalt cement has a highly viscous nature so it must be heated in order to mix with the aggregate. The aggregates used in the mixture contain metallic metal (pyrite). The mineral pyrite, or iron pyrite, also known as fool's gold, is an iron sulfide and is the most common sulfide mineral.

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Fire in hot asphalt cargo hold, spontaneous ignition ...

Fire in hot asphalt cargo hold, spontaneous ignition during unloading C:UsersFHHEDocumentsArtikler2012 Asphalt cargo fireEngelsberg asphalt fire-05-s-kolo.docx 2 . 1 Summary While unloading hot asphalt from a marine tanker a fire broke out in the cargo hold. The likely cause was ingress of air caused by the unloading operation and

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Degradation processes of iron-sulfides and calcite ...

In brief, iron-sulfide and calcite containing aggregates used for preparation of asphalt mixtures were subjected to degradation processes under atmospheric conditions. Four locations with specific secondary mineral phases situated on highways and roads from Transylvania (Romania) were investigated.

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Pyrophoric materials create fire and explosion hazard

is pyrophoric iron sulfide. Pyrophoric iron sulfide is created when iron oxide (rust) is converted into iron sulfide in the presence of hydrogen sulfide. This chemical reaction only takes place in low oxygen conditions. When the pyrophoric iron sulfide particles are exposed to air, they are oxidized back to iron oxide, generating a considerable ...

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H 2 S Removal Media - Engineered to Guarantee Results

The iron hydroxide in the B.A.M., neutralizes the H 2 S by converting it into iron sulfide compounds through chemical reaction, and the bacteria serve to "refresh" the available reactant. MV's addition of biological agents to media result in removal of numerous non-sulfur bearing species such as VOC's and readily biodegradable organic ...

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Pyrophoric Iron Fires - Cult of Sea

At one time or another, most refineries experience spontaneous ignition of iron sulphide either on the ground or inside equipment. When this occurs inside equipment like columns, vessels, and tanks and exchangers containing residual hydrocarbons and air, the results can be devastating. Most commonly, pyrophoric iron fires occur during shutdowns when equipment and piping are […]

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Hydrogen Sulfide and Mercaptans - Liquid Minerals

Hydrogen Sulfide and Mercaptans LMG has developed a zinc-based oil soluble additive that by way of a non-reversible reaction forms a permanent compound with hydrogen sulfide. Our hydrogen sulfide scavenging additive is very effective at removing hydrogen sulfide when applied to your liquid materials. Hydrogen sulfide can also occur in asphalt.

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Worn valve, iron sulfide possible cause of Husky explosion ...

Worn valve, iron sulfide possible cause of Husky explosion ... at the Husky Refinery on April 26 that led to the puncturing of an asphalt tank and ensuing fire. ... contact with iron sulfide ...

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ANALYSIS OF SULFUR COMPOUND TYPES IN ASPHALT

Analysis of Sulfur Compound Types in Asphalt John Green, Shirley Yu, Charles Pearson, James Reynolds ... A rapid method for determination of total sulfur and major sulfur compound types in asphalt was ... of the sulfones produced. Sulfide versus thiophenic sulfones were sufficiently resolved to enable determination of each type.

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Corrosion of Iron by Sulfate-Reducing Bacteria: New Views ...

H 2 S is known to rapidly react with metallic iron [net reaction, H 2 S + Fe 0 → FeS + H 2, ΔG° = −72.5 kJ (mol Fe 0) −1], thereby forming the characteristic corrosion product iron sulfide. In the late 1960s and early 1970s, several authors demonstrated that such biogenic iron sulfides accelerated corrosion when deposited on the metal ...

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Worn valve, iron sulfide possible cause of Husky explosion ...

Worn valve, iron sulfide possible cause of Husky explosion SUPERIOR, Wis. -- A worn-out valve may have allowed air to contact various chemicals within equipment at the Husky Energy refinery in Superior, potentially triggering the April 26 explosion, the …

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Iron Sulfide - an overview | ScienceDirect Topics

Pyrophoric iron sulfide is formed by the action of corrosive sulfur compounds on iron and steel in process facilities, particularly in vessels, storage tanks, and pipeline scraper traps. If such equipment has contained asphalt, aromatic tars, sour crude, high-sulfur fuel oil, aromatic gases, and similar products, the potential exists for the ...

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Worn valve, iron sulfide possible cause of Husky explosion ...

Aug 02, 2018· Worn valve, iron sulfide possible cause of Husky explosion. ... That asphalt ignited at 12:15 p.m., over two hours after the initial explosion, and burned into the evening.

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Degradation processes of iron-sulfides and calcite ...

Iron-sulfide and calcite containing aggregates used for preparation of asphalt mixtures underwent degradation processes under atmospheric conditions. Four locations with specific secondary mineral phases situated on highways and roads from Transylvania (Romania) were investigated.

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Hydrogen Sulfide formation in Oil and Gas

Draft 2 Abstract Hydrogen sulfide (H 2S) can be a significant component of oil and gas upstream production, where H2S can be naturally generated in situ from reservoir biomass and from sulfate containing minerals through microbial sulfate reduction (MSR) and/or thermochemical sulfate reduction (TSR). On the other hand, the technologies employed in oil and gas production, especially from

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Formation and Oxidation of Sulfides on Pure Iron and Iron ...

Formation of pyrophoric iron sulfide (PIS) on the inside-walls of molten sulfur, crude oil or asphalt tanks is the problem to be solved to avoid accidental explosions in petroleum industries.

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*Iron Sulfide Detection Solution UN1760, 2 oz (60 mL ...

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Asphalt Storage Tanks - design

Jul 02, 2004· 6) Don't forget thermal expansion relative to your pump suction piping. A tank can expand enough to damage your pump. Don't allow air to flow through the tank (don't put multiple vents with large separation). Asphalt tanks form pyrophoric iron sulfide on the internal steel roof and shell that can cause a problem if too much air gets in the tank.

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Scale-Inhibitors - Halliburton

Scale inhibitors assist with oil and gas production by maintaining asset integrity. Multi-Chem's specialty scale inhibitors work to control a wide variety of scale production challenges to help prolong the life of …

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Hydrogen Sulfide in Petroleum - COQA

Hydrogen Sulfide ÊToxic, Colorless Gas ÊRotten Egg Odor ÊDetectable at >10 ppb ÊParalyzes olfactory system ÊLC50 = 713 ppm ÊWeak Acid, Air Oxidized, Absorbs On Metals ÊSolubility Depends On Temperature, Fuel, & Henry's Law

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H2S Scavenging for Asphalt Bitumen | Ecolab

Asphalt (bitumen) may contain very high vapor phase concentrations of hydrogen sulfide (H 2 S). H 2 S concentrations can easily exceed 20,000 ppm in the headspace of asphalt storage tanks; these concentrations present an immediate danger to personnel exposed through transport or handling of this product. This high concentration is due to the concentration of sulfur compounds in asphalt ...

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Hydrogen sulfide scavenger - Innophos, Inc.

Oct 10, 2017· Hydrogen sulfide may be released form asphalt, in particular when the asphalt is heated to a certain temperature. For example, hydrogen sulfide results from the dehydrogenation reactions that occur between bitumen and sulfur at the hot mixing temperatures, e.g. temperatures greater than 140° C. Hydrogen sulfide emissions are regulated.

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How to Remove Iron, Manganese, and Odor From Well Water

As the water passes thru the air pocket, iron and sulfur are oxidized. Additionally, dissolved oxygen is added to the water. The iron filter media bed then removes the iron and sulfur from the water. Air charger type iron filters can generally remove up to 8 ppm hydrogen sulfide and up to 10 ppm Iron.

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Worn valve, iron sulfide possible cause of Husky explosion ...

Aug 02, 2018· Worn valve, iron sulfide possible cause of Husky explosion ... Liquid asphalt gushes from a ruptured tank at the Husky Energy Refinery as seen in this April 27 aerial photo. ... then came in ...

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FQE Chemicals Case Histories

A collection of case histories on a number of our chemical products. Real client stories of successful chemical cleaning application results.

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POLYPHOSPHORIC ACID RESISTANT HYDROGEN SULFIDE SCAVENGER ...

Jul 19, 2016· A method and composition for reducing hydrogen sulfide generated or emitted from an asphalt composition are disclosed. In certain aspects, a method for reducing hydrogen sulfide emissions from an asphalt composition is provided wherein an additive is mixed with the asphalt composition and the additive is a copper-based complex. The asphalt composition can include asphalt and an asphalt ...

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