AMPP Store - Products tagged with 'reactive sulfur'

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04634 New Theory for Naphthenic Acid Corrosivity of Athabasca Oilsands Crudes

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

$20.00

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.

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Improved Unit Economics, Crude Blending and Throughput Management Using a Novel High Temperature Corrosion Prediction Framework

Product Number: MECC23-20054-SG

Author: Sridhar Srinivasan, Gerrit Buchheim

Publication Date: 2023

$20.00

Sulfur and acidic impurities in crude oils pose serious hot oil corrosion problems in crude distillation units (CDU) and associated vacuum distillation units (VDU), especially with the increase in processing of lowquality, opportunity crudes. In the range of 200-400˚C, reactive sulfur compounds cause sulfidation corrosion of ferritic carbon and chrome steels in CDU, VDU, and front ends of downstream units operating at hot oil temperatures. Over the same temperature range, naturally occurring carboxylic acids in crudes can be so aggressive that higher alloy, austenitic stainless steels containing >2.5% Mo are required for processing high acid oils.

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Quantifying Effect of Hydrogen and Sulfur in Mitigating Free Fatty Acid Corrosion in Renewable Diesel Applications

Product Number: 51324-20864-SG

Author: Sridhar Srinivasan; Winston Robbins; Gerrit Buchheim

Publication Date: 2024

$40.00

Production of Renewable Diesel (RD) and Sustainable Aviation Fuels (SAF) from bio / natural oils has seen significant investment in recent years, stemming from worldwide government mandated need to reduce fossil fuel CO2 emissions. New investments have occurred in retrofitting / adapting existing refinery hydroprocessing infrastructure to process natural oils or coprocess natural oils blended with crudes to produce RD and SAF. This stems from the fact that natural oils have the hydrocarbon (HC) structures to fit within the mid-distillate fuel product such as diesel and aviation fuel as well as that these processes are optimized for removal of unwanted Sulfur and Oxygen removal. In Corrosion/2023, the authors introduced a molecular mechanistic model to quantify FFA corrosion as a function of temperature and FFA concentration. This model exploited the similarity of FFA to carboxylic acids, akin to naphthenic acids found in conventional refinery crude unit process streams, especially in case of unsaturated FFA. A key aspect of modeling corrosion for FFA is the inhibitive role of hydrogen in the presence of Iron sulfide species. While natural oils do not contain sulfur compounds, presence of reactive sulfur species such as thiols and sulfides in coprocessing applications provides an easy pathway to provide for the formation of a potentially protective nano barrier layer of FeS. Further, the presence of FeS acts as a catalyst towards dissociation of molecular H2 to atomic H and subsequent reduction of FFA through atomic hydrogen. A threshold H2 partial pressure is required to ensure hydrogen reduction of FFA is kinetically dominant when compared to acid corrosion of Fe. Residence time of acid is another key parameter that will impact propensity for corrosion and / or H2 inhibition and is considered in the development of the prediction model. A framework incorporating the effects of H2 partial pressure, residence time and reactive S concentration is proposed for assessing FFA corrosion for various commonly utilized natural oils in renewable applications.

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Recent Failures Of Accelerated High Temperature Sulfidation Corrosion In The Oil Refining Industry

Product Number: 51321-16738-SG

Author: Hyungjin Lee, Hyeonsu Chae, Junmo Yang, Jaeseung Kim, Taehyung Kim, Taehyun Choi, Sungsu Cho, Moonyoung Lee, Homin Yun Jongun Lee, Hyeongkeun Choi, Gyutae Park, Hyunjoon Park, Seongyong Jang, Sunhyuk Bae, Jaewoong Kim

Publication Date: 2021

$20.00

High temperature sulfidation is one of the oldest damage mechanisms in the refining process such as crude distillation unit, vacuum distillation unit and hydroprocessing unit. Since corrosion proceeds to general corrosion and occurs in a high temperature environment, it is a type of corrosion that can lead to a large fire explosion when a leak occurs.

Products tagged with 'reactive sulfur'

04634 New Theory for Naphthenic Acid Corrosivity of Athabasca Oilsands Crudes

Improved Unit Economics, Crude Blending and Throughput Management Using a Novel High Temperature Corrosion Prediction Framework

Quantifying Effect of Hydrogen and Sulfur in Mitigating Free Fatty Acid Corrosion in Renewable Diesel Applications

Recent Failures Of Accelerated High Temperature Sulfidation Corrosion In The Oil Refining Industry

Association for Materials Protection and Performance