Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

04634 New Theory for Naphthenic Acid Corrosivity of Athabasca Oilsands Crudes

Picture for 04634 New Theory for Naphthenic Acid Corrosivity
Available for download

Oilsand bitumen crudes, characterized as corrosive by the classical naphthenic model, are producing negligible naphthenic acid corrosion in crude and vacuum units after more than 50 years of operation. A new theory proposes that the corrosivity of naphthenic acids in Athabasca oilsand bitumen crudes is a function of its molecular characteristics. 

Product Number: 51300-04634-SG
ISBN: 04634 2004 CP
Author: Barry Messer, Michael C. Beaton, and B. Tarleton, Fluor Canada Ltd.; Terrell T. Phillips, Fluor Corp
Publication Date: 2004
Industry: Oil and Gas Production
$0.00
$20.00
$20.00

Canadian Athabasca oilsand bitumen crudes, characterized as corrosive by the classical naphthenic model, are producing negligible naphthenic acid corrosion in crude and vacuum units after more than 50 years of cumulative operation. A new theory proposes that the corrosivity of naphthenic acids in Athabasca oilsand bitumen crudes is a function of its molecular weight, molecular structure, true boiling point, reactive sulfidic species, and local environment. The concept of Alpha (bad type) and Beta (good type) naphthenic acids is introduced. The Alpha naphthenic acids are characterized as corrosive, with low molecular weights, and Beta as non-corrosive and inhibitive, with high molecular weights. Hot extraction wash of the raw oil sand mixture appears to preferentially remove the higher water-soluble Alpha fraction leaving the less corrosive, less water-soluble, Beta fraction. Naphthenic acid surviving after thermal hydroprocessing tends to be of the inhibitive Beta type. Case histories, material selection, and corrosion reduction possibilities with opportunity crudes are discussed.

 Keywords: Naphthenic acid, TAN, naphthenic acid corrosion (NAC), oilsand bitumen crude, opportunity crude, alpha, beta, reactive sulfur

Canadian Athabasca oilsand bitumen crudes, characterized as corrosive by the classical naphthenic model, are producing negligible naphthenic acid corrosion in crude and vacuum units after more than 50 years of cumulative operation. A new theory proposes that the corrosivity of naphthenic acids in Athabasca oilsand bitumen crudes is a function of its molecular weight, molecular structure, true boiling point, reactive sulfidic species, and local environment. The concept of Alpha (bad type) and Beta (good type) naphthenic acids is introduced. The Alpha naphthenic acids are characterized as corrosive, with low molecular weights, and Beta as non-corrosive and inhibitive, with high molecular weights. Hot extraction wash of the raw oil sand mixture appears to preferentially remove the higher water-soluble Alpha fraction leaving the less corrosive, less water-soluble, Beta fraction. Naphthenic acid surviving after thermal hydroprocessing tends to be of the inhibitive Beta type. Case histories, material selection, and corrosion reduction possibilities with opportunity crudes are discussed.

 Keywords: Naphthenic acid, TAN, naphthenic acid corrosion (NAC), oilsand bitumen crude, opportunity crude, alpha, beta, reactive sulfur

PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 07569 Low Temperature Naphthenic Acid Corrosion Study
Available for download

07569 Low Temperature Naphthenic Acid Corrosion Study

Product Number: 51300-07569-SG
ISBN: 07569 2007 CP
Author: Alec Groysman, Naphtali Brodsky, Dmitry Schmulevich, and Yossi Pener
Publication Date: 2007
$20.00
Picture for Naphthenic Acid Corrosion in a High TAN Condensing Overhead System
Available for download

Naphthenic Acid Corrosion in a High TAN Condensing Overhead System

Product Number: 51317--9095-SG
ISBN: 9095 2017 CP
Author: Kwadwo Sarpong
Publication Date: 2017
$20.00

A case history where an ethoxylated thio-phosphate ester was successfully used to mitigate low temperature naphthenic acid corrosion in a high total acid number condensing overhead system in which a traditional imidazoline corrosion inhibitor failed.
Picture for 98579 FACTORS CONTROLLING NAPHTHENIC ACID
Available for download

98579 FACTORS CONTROLLING NAPHTHENIC ACID CORROSION

Product Number: 51300-98579-SG
ISBN: 98579 1998 CP
Author: E Slavcheva, B Shone, A Turnbull
$20.00
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