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Abu Dhabi, United Arab Emirates

Suleiman M.I.,Takreer Research Center | George A.,Abu Dhabi Oil Refining Company
Annual Conference of the Australasian Corrosion Association 2014: Corrosion and Prevention 2014 | Year: 2014

Incidents of high sulphidic corrosion rates and equipment failures have been reported in several crude and condensate processing facilities of petroleum refineries. Affected materials were carbon and low alloy steels operated in temperatures ranging from 200 to 300 °C. These failures were attributed to specific sulphur species and were not anticipated by corrosion prediction tools used for their material selection. The corrosion mechanisms of these species are not fully understood. This paper presents Takreer Research Centre (TRC) research work for isolating the active sulphur species responsible for the corrosion, understanding their mechanisms, and developing respective corrosivity indexing. Selected samples of condensates and crude oil were first analysed for total sulphur, hydrogen sulphide (H2S), Mercaptans (RSH) and other impurities. Sulphur dissociation testing of these samples at temperatures up to 400°C indicated that each sample was having specific temperature range for H2S evolution. Using a Silver Nitrate treatment and Gas Chromatograph with Sulphur Chemilumenesence Detector (GC-SCD), it was possible to isolate and identify Mercaptans and sulphides from the process samples. Further dissociation testing resulted in the liberation of H2S mainly from Mercaptans. Laboratory corrosivity testing of condensate sample using carbon steel and low alloy steel coupons at 275°C indicated that the corrosion rate was mainly related to the Mercaptans species within the Total Sulphur. The results concluded that specific dissociation temperature of respective Mercaptans is a useful tool in predicting the possibility and extent of corrosion and its vulnerable process loop. Source


Inamura K.,Idemitsu Kosan Co. | Inamura K.,Abu Dhabi Oil Refining Company | Kagami N.,Idemitsu Kosan Co. | Shirakawa T.,Idemitsu Kosan Co. | And 2 more authors.
Research on Chemical Intermediates | Year: 2015

We have been developing zeolite catalysts for fixed-bed resid hydrodesulfurization (HDS) units. The catalysts, named R-HYC, show high resid hydrocracking (HYC) activity by increasing middle distillates and concurrently decreasing bottom fuel oil. To meet refinery demands for lower catalyst cost and improved HYC activity, the newest R-HYC has been developed as R-HYC12, showing more than twofold improved HYC activity compared with the previous R-HYC10, by means of modifications to some specific properties of Y-zeolite. A new sequence combining the developed R-HYC12 with the other, hydrodemetallization (HDM) and HDS catalysts has been proposed to achieve the best resid HDS unit performance. © 2015 Springer Science+Business Media Dordrecht Source


Suleiman M.I.,Abu Dhabi Oil Refining Company
Solid State Phenomena | Year: 2015

High temperature sulphide corrosion and equipment failures have been reported in several crude and condensate processing facilities of petroleum refineries. Affected materials were carbon and low alloy steels operated in temperatures ranging from 200 to 300°C.These failures were attributed to specific sulphur species and were not anticipated by corrosion prediction tools used for their material selection. The corrosion mechanisms of these species are not fully understood. This paper presents Takreer Research Centre (TRC) research work for isolating the active sulphur species responsible for the corrosion. Two condensate samples were first analysed for total sulphur, hydrogen sulphide (H2S), Mercaptans (RSH) and other impurities. Using Gas Chromatograph with Sulphur Chemilumenesence Detector (SCD), it was possible to identify Mercaptans and sulphides from the process samples. Laboratory corrosivity testing of condensate sample using carbon steel and low alloy steel coupons at 275°C indicated that the corrosion rate was mainly related to the Mercaptans species within the Total Sulphur. The results concluded that specific dissociation temperature of respective Mercaptans is a useful tool in predicting the possibility and extent of corrosion and its vulnerable process loop. © (2015) Trans Tech Publications, Switzerland. Source


Al Dhaheri M.O.A.A.Y.,Abu Dhabi Oil Refining Company | Harrision P.S.,Abu Dhabi Oil Refining Company
Society of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference 2012, ADIPEC 2012 - Sustainable Energy Growth: People, Responsibility, and Innovation | Year: 2012

This paper reviews the challenges faced in the Management of TAKREER's mega Ruwais Refining Expansion Project to achieve high standards for Safety, Quality, Schedule and Costs. Copyright 2012, Society of Petroleum Engineers. Source


Suleiman M.I.,Abu Dhabi Oil Refining Company | Padmalayan S.,Abu Dhabi Oil Refining Company
Australasian Corrosion Association Annual Conference: Corrosion and Prevention 2015, ACA 2015 | Year: 2015

Seawater is the main source of industrial cooling and potable water in the United Arab Emirates (UAE). In this region heat exchangers tube material for seawater environment is mainly made from aluminium brass and cupronickel (Cu-Ni) alloys. Premature failures of these tubes have been observed both in refineries and desalination plants due to pitting, erosion, and sometimes under deposit corrosion. The contributing factors appeared to be seawater quality, velocity, residual chlorine, and suspended solids. These factors can act together or individually by hindering the formation of a thin protective oxide film on the surface of the material. Past studies have addressed the mechanisms of seawater corrosion considering individual and combined effects. However, statistics have indicated that heat exchanger tube failure sometimes occurred in faster rates than previously predicted. It is thought that there are specific characteristics of regional shallow coastal seawaters in particular the degree of salinity, and metal ions content. This paper presents results of corrosivity study of seawater and brine collected from two refineries and two desalination plants, including statistics of process plants heat exchangers tubes failures in two in these plants. Detailed chemical analysis of seawater and brine samples were carried out using inductively coupled plasma mass spectrometry (ICP-MS). Baseline corrosivity was established in a static artificial seawater, and brine using electrochemical (Potentiodynamic), immersion test methods using electrodes, and weight loss corrosion coupons made from aluminium brass and Cu-Ni90:10/70:30 at 25°C. This was then compared with the corrosivity of the actual seawater and respective brine streams using online corrosion measurements. The impact of the residual chlorine concentration was also evaluated. Results have indicated that corrosivity of the tested samples is greatly affected by the residual chlorine concentration, water quality, the amount of suspended solids and water velocity. Finally, mitigation methods to minimize the impacts of these contributing factors are proposed in this work. Source

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