Amine unit corrosion in refineries EFC46 (European by J D Harston, F Ropital

By J D Harston, F Ropital

The corrosion of carbon steels in amine devices used for gasoline therapy in refining operations is an immense challenge for the petrochemical undefined. Maximising amine unit reliability, including enhancing throughput, stream and therapy skill, calls for more beneficial methods of measuring and predicting corrosion charges. besides the fact that, there was an absence of knowledge on corrosion. This priceless record is helping to therapy this lack of expertise via summarising findings from over 30 crops. It covers such amine kinds as methyl diethanolamine (MDEA), diethanolamine (DEA), monoethanolamine (MEA) and di-isopropanolamine (DIPA), and makes tips on fabrics and method parameters to maximize amine unit potency and reliability.

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Extra resources for Amine unit corrosion in refineries EFC46 (European Federation of Corrosion)

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1 Amine parameters and foaming Amine Concentration (wt%) Circulation 22 20 25 25–30 16–30 30 40 t h–1 76 t h–1 80 t h–1 30–50 t h–1 30–65 t h–1 35 t h–1 Loss 30 t N/A N/A 27 t 10 t 67 t a–1 a–1 a–1 a–1 Foaming Plant No No No Sometimes Noticed Sometimes (1) (2) (3) (4) (5) (6) Experiences of twenty-one plants using diethanolamine Amine Concentration (wt%) Circulation 16–23 22–27 20–24 29 ? 8 30 45–65 t h–1 15–30 t h–1 64 t h–1 170 m3 h–1 ? 2 23 Loss Foaming Plant 52 t a–1 26 t a–1 14 t a–1 60 t a–1 ?

05 mol mol–1 ? 6 (formate and acetate) 1–5 Not known ? 0? 4 m s–1 for stainless steel. 2 Location of problems per item of equipment Regenerators (7), (8), (11), (12), (13), (16), (17), (18) Regenerator overheads drum (1), (4), (5), (12) Regenerator overheads condenser Regenerator overheads piping (4), (5), (12) (2), (5) Regenerator reboiler (1), (7), (8), (11), (12), (13), (14), (15), (17), (18), (20) Rich–lean exchanger (3), (6), (7), (9), (11), (12), (14), (18) Lean amine (1), (11) 30 Amine unit corrosion in refineries 5 Experiences of four plants using monoethanolamine The plant numbers are given in parentheses.

4 m s–1 for stainless steel. 2 Location of problems per item of equipment Regenerators (7), (8), (11), (12), (13), (16), (17), (18) Regenerator overheads drum (1), (4), (5), (12) Regenerator overheads condenser Regenerator overheads piping (4), (5), (12) (2), (5) Regenerator reboiler (1), (7), (8), (11), (12), (13), (14), (15), (17), (18), (20) Rich–lean exchanger (3), (6), (7), (9), (11), (12), (14), (18) Lean amine (1), (11) 30 Amine unit corrosion in refineries 5 Experiences of four plants using monoethanolamine The plant numbers are given in parentheses.

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