Coal liquids distillation tower corrosion. Synergistic effects of chlorides, phenols and basic nitrogen compounds

Journal Article · Fri Dec 31 23:00:00 EST 1982 · Ind. Eng. Chem. Process Des. Dev.; (United States)

DOI:https://doi.org/10.1021/i200020a003· OSTI ID:6161477

Sagues, A A

Instances of severe chloride-related corrosion have been reported for the distillation areas of coal liquefaction pilot plants. In the investigation reported in this paper, controlled amounts of chloride were added to coal liquid samples, fractions of those samples, and mixtures of representative model compounds. The corrosivity of these media was measured using corrosion test coupons. It was found that water-soluble chlorides, basic nitrogen compounds and phenols showed a synergism that resulted in high corrosivity when those compounds were present simultaneously in the liquid. The corrosion was of the same type as that observed in the pilot plant environments. The results also indicate that the corrosion is a chemical reaction, which in the case of carbon steel corresponds to a product stoichiometry of FeCl/sub 2/ and has a corrosion rate proportioned to the concentration of unreacted inorganic chlorides in the liquid.

• OSTI ID: 6161477
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem. Process Des. Dev.; (United States) Vol. 22:1; ISSN IEPDA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
AROMATICS
CARBON STEELS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COAL LIQUEFACTION PLANTS
COAL LIQUIDS
CORROSION
CORROSION PRODUCTS
CORROSIVE EFFECTS
DISTILLATION
DISTILLATION EQUIPMENT
EQUIPMENT
EXTRACTION APPARATUSES
EXTRACTION COLUMNS
FLUIDS
HALIDES
HALOGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
LIQUIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHENOLS
SEPARATION EQUIPMENT
SEPARATION PROCESSES
STEELS
SYNERGISM