Menu
Search
Filters
Close
Menu

Save 20% on select titles with code HIDDEN24 - Shop The Sale Now

07573 Survey of Materials in Hydrotreater Units Processing High TAN Feeds

Picture for 07573 Survey of Materials in Hydrotreater Units Processing High TAN Feeds
Available for download

This paper helps answer some questions by surveying numerous units processing high naphthenic acid-containing feeds, e.g. feeds with high total acid number (TAN). The survey lists the unit temperatures, TAN’s, flow schemes, materials and corrosion history. 

Product Number: 51300-07573-SG
ISBN: 07573 2007 CP
Author: Cathleen A. Shargay, Karly Moore, and Richard Colwell
Publication Date: 2007
Industry: Petroleum Refining
$0.00
$20.00
$20.00

Questions of when, where and why hydroprocessing units within oil refineries can see naphthenic acid corrosion are often raised, and to date, there has been little, if any published data to answer these questions. This has resulted in a variety of different metallurgies being chosen, some of which compromise on other desired properties and/or cause costly requalification of fabricators’ procedures. This paper helps answer some questions by surveying numerous units processing high naphthenic acid-containing feeds, e.g. feeds with high total acid number (TAN). The survey lists the unit temperatures, TAN’s, flow schemes, materials and corrosion history. A beneficial effect of hydrogen was shown, as no corrosion has occurred on 300 series SS materials downstream of the hydrogen injection point. Theories for why the hydrogen is beneficial are presented and attempts to prove/disprove various theories by reviewing the chemical reaction dynamics of the corrosion reactions were made. However, the necessary constants were not readily available, and hence, no theory was conclusive enough to explain the benefit. Regardless, the experiential data seems strong enough to use as a basis for setting inspection strategies and selecting new materials.

Key Words: Naphthenic acid, hydroprocessing units, materials selection, hydrogen

 

Questions of when, where and why hydroprocessing units within oil refineries can see naphthenic acid corrosion are often raised, and to date, there has been little, if any published data to answer these questions. This has resulted in a variety of different metallurgies being chosen, some of which compromise on other desired properties and/or cause costly requalification of fabricators’ procedures. This paper helps answer some questions by surveying numerous units processing high naphthenic acid-containing feeds, e.g. feeds with high total acid number (TAN). The survey lists the unit temperatures, TAN’s, flow schemes, materials and corrosion history. A beneficial effect of hydrogen was shown, as no corrosion has occurred on 300 series SS materials downstream of the hydrogen injection point. Theories for why the hydrogen is beneficial are presented and attempts to prove/disprove various theories by reviewing the chemical reaction dynamics of the corrosion reactions were made. However, the necessary constants were not readily available, and hence, no theory was conclusive enough to explain the benefit. Regardless, the experiential data seems strong enough to use as a basis for setting inspection strategies and selecting new materials.

Key Words: Naphthenic acid, hydroprocessing units, materials selection, hydrogen

 

Product tags
Also Purchased
Picture for 11360 Corrosion in Crude Distillation Unit Overhead Operations: A Comprehensive Review
Available for download

11360 Corrosion in Crude Distillation Unit Overhead Operations: A Comprehensive Review

Product Number: 51300-11360-SG
ISBN: 2011 11360 CP
Author: Brian Chambers, Sridhar Srinivasan, Kwei Meng Yap, Mark Yunovich
Publication Date: 2011
$20.00

 The purpose of this paper will be to: (a) review published literature to characterize and classify speciation related to the types of impurities encountered in opportunity crudes; and (b) describe and categorize published case studies of corrosion in crude unit overhead operations.
Picture for 07565 Effect of Mercaptans and Other Organic Sulfur Species on High Temperature Corrosion in Crude a
Available for download

07565 Effect of Mercaptans and Other Organic Sulfur Species on High Temperature Corrosion in Crude and Condensate Distillation Units

Product Number: 51300-07565-SG
ISBN: 07565 2007 CP
Author: J. D. Jong, A. Saunders-Tack, M. Sargent, A. M. Etheridge, W. C. Fort, and N. Dowling
Publication Date: 2007
$20.00

The corrosivity of four mercaptans and selected crude oil fractions were measured in lab tests. Conclusion: Mercaptan corrosion can contribute significantly to the total sulfur related corrosion in the temperature range 235–300°C, which agrees with observations of elevated temperature corrosion in refinery distillation equipment.
Picture for 07564 FCCU Light Ends Plant Carbonate Stress Corrosion Cracking Experience
Available for download

07564 FCCU Light Ends Plant Carbonate Stress Corrosion Cracking Experience

Product Number: 51300-07564-SG
ISBN: 07564 2007 CP
Author: Douglas J. Milton, Chris G. Smalley, Robert I. Botto, William T. Bresnahan, and Bill Zagrany
Publication Date: 2007
$20.00

As a result of a Carbonate Stress Corrosion Cracking (CSCC) event at one refinery an investigation was made into the cause and mitigation of CSCC. This paper outlines the information obtained and the development of tools that could be utilized by other refinery fluidized catalytic cracker units (FCCU's) to better assess risk of CSCC.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support