This item is in: Materials > Corrosion and surface engineering > Corrosion
Amine unit corrosion in refineries: (EFC 46)
J Harston and F Ropital
- covers such amine types as Methyl Diethanolamine (MDEA) and Di-isopropanolamine
- makes recommendations on materials and process parameters to maximise amine unit efficiency and reliability
The corrosion of carbon steels in amine units used for gas treatment in refining operations is a major problem for the petrochemical industry. Maximising amine unit reliability, together with improving throughput, circulation and treatment capacity, requires more effective ways of measuring and predicting corrosion rates. However, there has been a lack of data on corrosion. This valuable report helps to remedy this lack of information by summarising findings from over 30 plants. It covers such amine types as methyl diethanolamine (MDEA), diethanolamine (DEA), monoethanolamine (MEA) and di-isopropanolamine (DIPA), and makes recommendations on materials and process parameters to maximise amine unit efficiency and reliability.
ISBN 1 84569 237 3
ISBN-13: 978 1 84569 237 7
April 2007
56 pages 234 x 156mm paperback
£55.00 / US$95.00 / €70.00
Usually dispatched within 24 hours
About the authors
Dr John Harston is an internationally-known expert on corrosion in refining operations. In 1996 he set up Working Party 15 (Corrosion in the Refinery Industry) within the European Federation of Corrosion (EFC).
Professor François Ropital works in the Department of Corrosion at the Institut Francais du Pétrole (IFP) and has been Chair of Working Party 15 in the EFC since 2002.
Contents
Introduction
Technical background
Process Issues; Pre-treatment, Absorber, Regenerator. Important issues. Corrosion Issues; General factors, Mechanisms, Rich amine, Lean amine, Acid gas attack, Heat stable salts, Make-up water quality, Erosion corrosion, Proprietary chemical additions, Corrosion in regenerator overheads, Hydrogen-related cracking in Wet H2S systems, Alkaline stress corrosion cracking. Materials.
Experience from 10 Plants Using Methyl Diethanolamine (MDEA)
Gas composition. Materials and performance; Carbon steel materials, Special carbon steel materials, Special stainless steel materials, Clad or coat. Operating parameters; Amine, Acid gases/HSAS/Velocity/Reboil (°C), Make-up water, Filtration, O2 leakage, Inlet Gas KO, Design factors. Corrosion control; Any treatments? Monitoring, Control parameters for overhead. Corrosion problems experienced. Summary of some of the data.
Experience from 21 Plants using Diethanolamine (DEA)
Gas composition. Materials of construction; Carbon steel materials, Special carbon steel materials, Special stainless steel materials, Overlays, cladding, coating, Stress relieving policy. Operating parameters; Velocity, Make-up water, What solids are present and what filtration, O2 leakage, Inlet gas KO valve, Design factors taken care of? Corrosion control; Any treatments, Monitoring, Control parameters for overheads. Corrosion problems experienced; Findings for each item, Summary of findings per equipment.
Experience from 4 Plants using Monoethanolamine (MEA)
Gas composition. Materials of construction; Carbon steel materials, Any special carbon steels, Special stainless steels, Any overlays, cladding, coating? Operating parameters; Amine concentration, Losses, Foaming, Rich amine acid gas, Lean amine acid gas, Velocity, HSAS, Reboiler, Make-up water, Solids, O2 leakage, Inlet gas KO vessel, Design factors. Corrosion control; Any treatments? Monitoring, Control parameters. Corrosion problems experienced; Regenerator, Regenerator overheads, Regenerator reboiler, Lean/Rich exchanger, No corrosion.
Experience from 1 Plant using Di-isopropanolamine (DIPA)
Gas composition. Materials of construction; Material, Any special carbon steels, Special stainless steels, Overlays, cladding, coating, Stress relieving policy. Operating parameters; Amine concentration, Loss, Foaming, Rich amine acid gas, Lean amine acid gas, Velocity, HSAS, Reboiler, Make-up water, Solids, O2 leakage, Inlet gas KO vessel, Design factors. Corrosion control; Any treatments, Monitoring, Control parameters. Corrosion problems experienced; Piping/equipment.