Search
Filters
Close

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

A New Prediction Tool For Sulfidation Corrosion In Crude Units

In recent years, unexpected failure caused by sulfidation corrosion have increased presumably because many refineries diversify the crude oils to process them. Crude oils contain corrosive species such as sulfides, nitrides, chlorides, organic acids and chemical additives. In these corrosive species, sulfides in the fluids cause sulfidation corrosion operating at temperature above approximately 260 °C1.

Product Number: 51321-16762-SG
Author: Kazuhiro Toba, Shinji Miyamoto, Satoshi Tokuoka
Publication Date: 2021
$0.00
$20.00
$20.00

A new prediction tool was developed for sulfidation corrosion applied in crude units. The corrosion rate of sulfidation is predicted using the total sulfur concentration and temperature by the modified McConomy curves. However, the corrosion behavior in crudes even with the same total sulfur concentration is sometimes different. This is because the corrosion rate might be affected by reactive sulfur compounds in particular crudes. This study was conducted to enhance prediction technique using a new factor replaced with the total sulfur concentration. For the target crude oils, diesel, heavy gas oil and residue fractions were distilled using a 15-stage distillation apparatus. The corrosion rates by immersion tests with each fraction were not correlated with the total sulfur and mercaptan concentrations. Then, “S factor” is proposed as a new concept to evaluate the sulfidation corrosion rate. The coefficients are determined for the total sulfur and mercaptan concentrations in distillates, and the S factor is defined as an addition of each term. As a result, the corrosion rates have a good correlation with the S factor. As well as the total sulfur and mercaptan concentrations, the S factor is installed as a prediction factor of the sulfidation corrosion of crudes.

A new prediction tool was developed for sulfidation corrosion applied in crude units. The corrosion rate of sulfidation is predicted using the total sulfur concentration and temperature by the modified McConomy curves. However, the corrosion behavior in crudes even with the same total sulfur concentration is sometimes different. This is because the corrosion rate might be affected by reactive sulfur compounds in particular crudes. This study was conducted to enhance prediction technique using a new factor replaced with the total sulfur concentration. For the target crude oils, diesel, heavy gas oil and residue fractions were distilled using a 15-stage distillation apparatus. The corrosion rates by immersion tests with each fraction were not correlated with the total sulfur and mercaptan concentrations. Then, “S factor” is proposed as a new concept to evaluate the sulfidation corrosion rate. The coefficients are determined for the total sulfur and mercaptan concentrations in distillates, and the S factor is defined as an addition of each term. As a result, the corrosion rates have a good correlation with the S factor. As well as the total sulfur and mercaptan concentrations, the S factor is installed as a prediction factor of the sulfidation corrosion of crudes.

Also Purchased
Picture for Recent Failures Of Accelerated High Temperature Sulfidation Corrosion In The Oil Refining Industry
Available for download
Picture for Corrosion Characteristics of Intermediate Light Oil Under Storage Tank Environment
Available for download

51315-5876-Corrosion Characteristics of Intermediate Light Oil Under Storage Tank Environment

Product Number: 51315-5876-SG
ISBN: 5876 2015 CP
Author: Dingrong Qu
Publication Date: 2015
$0.00