Abu Dhabi, United Arab Emirates
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Patent
United Arab Emirates University and Abu Dhabi Oil Refining Company | Date: 2015-08-18

A system for contacting gases and liquids comprises a vessel containing inert particles, wherein the total volume of the inert particles is from 1 to 20% of the total working volume of the vessel.


Patent
United Arab Emirates University and Abu Dhabi Oil Refining Company | Date: 2015-08-18

The present invention relates to a process for reducing in a gas stream the concentration of carbon dioxide and for reducing in an aqueous stream the concentration of sodium chloride,


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.


Firmansyah T.,Abu Dhabi Oil Refining Company | Rakib M.A.,Abu Dhabi Oil Refining Company | George A.,Abu Dhabi Oil Refining Company | Al Musharfy M.,Abu Dhabi Oil Refining Company | Suleiman M.I.,Abu Dhabi Oil Refining Company
Applied Thermal Engineering | Year: 2016

In this paper, a Computational Fluid Dynamics (CFD) model was developed for solving transient conjugate heat transfer of pre-heated atmospheric residue from a crude distillation unit in buried pipelines following pipeline shutdowns. The emphasis of the simulations was to predict cooling curves of the residue in a pipeline during shutdowns to help predict time allowance for operations and maintenance activities to troubleshoot the problem and resume operations before full solidification. Winter conditions were chosen to estimate duration for initiation of solidification of the residue using a criterion of pour point derived from laboratory analysis. Two different modeling approaches have been presented; axisymmetric and full pipe cross-section and both have given comparable results in estimating the residue solidification times. A scenario of energy savings by reducing initial temperature of the pre-heated residue and its impacts to the solidification time has also been presented. The results from transient CFD simulations showed cooling temperature fronts across all thermal layers including estimated time taken for the residue to reach a safe temperature margin above pour point. The model can be used as a valuable flow assurance tool to avoid the risk of residue solidification in pipelines and thus negative impact on economic resources. © 2016 Elsevier Ltd.


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.


Chandak N.,Abu Dhabi Oil Refining Company | Al Hamadi A.,Abu Dhabi Oil Refining Company | Yousef M.,Abu Dhabi Oil Refining Company | Mohamed A.,Abu Dhabi Oil Refining Company | And 2 more authors.
Fuel | Year: 2014

A pilot plant test was carried out using a catalyst from the refinery hydrotreater unit to process blend feed of 70 vol% Light Gas Oil - LGO & 30 vol% hydrotreated Gas Oil - HDT GO to produce 8 ppm ultra-low sulphur diesel (ULSD) product. The impact of changes in process conditions have been studied for catalyst deactivation rate and hydrogen consumption. Test results shown that refinery unit can process such blend feed to reach 8 ppm sulphur product by an increase of the reactor bed temperature. However due to higher aromatic content in the blend feed as compare to reference feed LGO, moderate increase in hydrogen consumption was also observed. Catalyst performance was evaluated at 55/42/32 bar hydrogen partial pressure (PPH2) to determine catalyst deactivation rate and hydrogen consumption, targeting ULSD product. A decrease of PPH2 from 52 bar (which is current operating condition) to 32 bar resulted in reduction of H2 consumption but also shows decrease of catalyst cycle length due to higher deactivation rate. Pilot plant test shows that by contriving computational methods and analysis techniques for hydrogen balance & catalyst deactivation rate from the pilot plant test data, it becomes possible to predict catalyst performance in commercial unit. © 2014 Elsevier Ltd. All rights reserved.


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.


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.


Al Hamed O.,Abu Dhabi Oil Refining Company
Society of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference, ADIPEC 2015 | Year: 2015

The objective of this paper is to showcase the strategic integration of TAKREER Ruwais Refinery within its existing Ruwais Refinery - East (RR-East), Ruwais Refinery Expansion - West (RR-West), upcoming CB&DC (Carbon Black & Delayed Coker project) facilities and also with other operating companies (OPCOs). The paper highlights how this integration enhances synergy amongst all OPCOs which leads to overall reduction in capital costs, GRM maximization, Energy Optimization and therefore leading to value maximization. TAKREER'S project team judiciously conducted detailed technical and economic feasibility studies to ensure refinery configuration and its integration within TAKREER and with other OPCOs not only meet TAKREER's vision in becoming a World Class diversified Refining Complex but also realize the overall objective of ADNOC group of companies. High Benzene Reformate streams from RR (East) and ADRD (TAKREER Abu Dhabi Refinery) are upgraded in RR(West)'s Bensat unit to produce Low Benzene Reformate. LPG from RR (East) & RR (West) is processed in RR (West) to maximize High octane Alkylate production replacing hazardous MTBE. TAKREER'S CB&DC project would convert low valuable heavy bottom of the barrel feedstocks like Slurry oil from RR (West) & Vacuum Residue from RR (East) into high valuable specialized products i.e., Anode grade Coke, Carbon black, etc while ensuring Zero Fuel Oil generation from the Refinery. Crude oil is sourced from ADCO and Natural Gas used as fuel is sourced from GASCO. Utilities i.e., Steam and water are produced as captive from within, power is sourced from TRANSCO. Nitrogen is sourced from ELIXIER. TAKREER's main product i.e. High valuable Polymer Grade Propylene product is exported to BOROUGE as feedstock to BOROUGE's Polypropylene units. TAKREER's upcoming state of the art Propane De-Hydrogenation Unit would not only utilize Propane & LPG streams from RR (West) & RR (East) but also use Propane stream from GASCO to produce Propylene. Similarly, Carbon Black product would be exported to BOROUGE. Liquid Sulphur product and LPG is sent to GASCO. To minimize loss of products or minimize downtime within TAKREER as well as across OPCOs, facilities are available for mutual sharing of streams like Hydrogen, Ethane Rich Gas and Butane streams can be shared within TAKREER'S RRE, RRD & CB&DC facilities. Copyright 2015, Society of Petroleum Engineers.


Chandak N.,Abu Dhabi Oil Refining Company | George A.,Abu Dhabi Oil Refining Company | Hamadi A.A.,Abu Dhabi Oil Refining Company | Berthod M.,Abu Dhabi Oil Refining Company
Catalysis Today | Year: 2015

This paper describes the hydrocracker pilot plant operations to produce Un-Converted Oil (UCO) selective for Base Oil production while achieving the middle distillate quality. This test was carried out to optimize feed and product quality for the commercial Base Oil unit to produce high viscosity index (VI) lube oil. The main objective of this experiment was to assess the performance of the hydro-cracking (HC) catalyst at different conversion levels between 50. wt% and 70. wt% and evaluate the quality of the Base Oil (BO) that would be produced in the commercial unit. For the test, fixed bed reactor was packed with commercial HC catalyst with pre-treatment hydro-treating (HT) catalyst upstream. The process parameters and product yields were studied by varying the HC reactor temperature. Then, hydrocracker products i.e. total liquid product (TLP) were collected and distilled into distillates and UCO. Special emphasis was given to the UCO quality with respect to the conversion so that it can produce desired Base Oil grades of Group-II (Gr II) and Group-III (Gr III). The experimental results have shown that it is possible to produce the Base Oil on specifications even at lower conversion up to 50. wt%. Details of hydrocracker pilot plant design, catalyst, operations and study results are discussed. © 2015 Elsevier B.V.

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