ARTICLES
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Optimising sweep gas flow in a flare header
Oct-2012
How to calculate the minimum flow of flare header sweep gas needed to maintain safe conditions
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Calculating column relief loads
Apr-2010
Conventional, steady-state and dynamic simulation techniques are compared in a study of relief loads for failure modes applied to a distillation colum ...
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Jul-2013
A simulation model compares accurately with actual operating data to provide reliable predictions of catalyst lifetime in naphtha reforming
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Simulation of a visbreaking unit
Apr-2011
Simulation of a commercial visbreaking unit supports optimisation of the unit’s performance. The visbreaking unit utilises vacuum residue as a feed and ...
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Oct-2016
Software based on the latest international codes enables straightforward design of storage tanks in a range of load conditions
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Simulation model increases visbreaker conversion
Jan-2011
Introduction of advanced analytical monitoring, chemical treatment and process optimisation has raised the profitability of a visbreaker unit
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Sour water: where it comes from and how to handle it
Sep-2011
Sour water strippers are common in gas processing facilities, sulphur recovery units, wellhead facilities, and refinery applications. Understanding the ...
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The role of tail gas treating unit quench towers
Jun-2016
A quench tower cools gas entering a tail gas amine unit but also protects the amine against SO2 breakthrough.
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Managing vanadium from high metals crude oils
Sep-2003
Improvements in process and equipment design with regard to crude unit and delayed coker distillation column performance can reduce metals content
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Practical hydrocarbon dew point specification for natural gas transmission lines
Mar-2011
Hydrocarbon liquid dropout can cause a number of problems in gas transmission lines, including increased pressure drop, reduced line capacity and equipment ...
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Dynamic simulation: a tool for engineering problems
Oct-2012
Dynamic simulation can be used to solve engineering problems that require an in-depth understanding of transient processes
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Tube rupture in a natural gas heater
Feb-2016
Dynamic simulation supports the use of a pressure safety valve over a rupture disk in the event of a tube rupture
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Stepwise simulation of vacuum transfer line hydraulics
Oct-2009
A stepwise hydraulic calculation determines the pressure profile of a vacuum transfer line by linking the hydraulic model to process simulation result ...
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Identifying poor heat exchanger performance
Sep-2007
Identifying root causes of poor crude unit debutaniser reboiler performance and low-cost solutions that help meet exchanger original design conditions
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Determining safety distance in process design
Jan-2015
Safety distance determination is a key design issue that may have a dramatic impact on a refinery construction project
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Applying relief load calculation methods
Apr-2008
Case study compares dynamic simulation vs conventional unbalanced heat method for relief load calculations in a naphtha hydrotreater, focusing on the strengths ...
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Simulating optimal tank farm design
Apr-2005
Development of a computerised model incorporating Monte Carlo operational risk simulation with the optimisation power of linear programming
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Using pinch technology in operations?
Sep-2013
Pinch Technology is a well established concept, and a tool used to optimise waste heat recovery and design efficient heat integration schemes in a wide ...
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Simulating crude units with preflash
Nov-2016
Process simulation offers a cost effective way of testing ideas to improve yield and energy performance.
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Simulating and monitoring H2 plant operations
Oct-2012
A computer program was developed to enable a refinery to monitor its hydrogen production daily to foresee potential operating problems
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Jan-2009
In part I, reaction kinetics, cracking chemistry, pressure balance, catalyst and vapour residence times, and fluidisation were considered. In part II, ...
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Improving refinery distillation operations
Apr-2008
The outline of a route map or staged approach to unit process improvement follows similar steps to those taken when installing advanced controls on a ...
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Jul-2015
Computational fluid dynamics was used to analyse the performance of side entry mixers in large crude tanks
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Crude oil cargo selection and time frame of LP optimisation
Jul-2010
Combinatorial selection is the most rigorous and theoretically correct method of crude oil cargo evaluation. Efficient algorithms are key to its imple ...
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Optimisation of a diesel hydrotreating unit
Jan-2015
A model based on operating data is used to meet sulphur product specifications at lower DHT reactor temperatures with longer catalyst life
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Molecular management for refinery-petrochemical complexes
Aug-2020
Designing a digital twin for process simulation of an integrated complex enables enhanced molecular management to deliver higher margin.The future comprises ...
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Simulation model increases visbreaker conversion
Jan-2011
Introduction of advanced analytical monitoring, chemical treatment and process optimisation has raised the profitability of a visbreaker unit
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Best practice for refinery flowsheets
Aug-2019
Refinery-wide flowsheets can demonstrate the true representation of changes in key operating variables and their associated impact on refinery operati ...
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Stepwise simulation of vacuum transfer line hydraulics
Oct-2009
A stepwise hydraulic calculation determines the pressure profile of a vacuum transfer line by linking the hydraulic model to process simulation result ...
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Start-up and shutdown issues in sulphur processing
Nov-2020
Knowing the limitations of the sulphur unit and what may occur during start-ups and shutdowns helps to prevent damage.
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Are produced water emission factors accurate?
Oct-2016
Rules of thumb are often used for estimating emissions from Produced Water storage tanks, especially when entrained hydrocarbons are present.
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Modelling ensures a successful revamp
Nov-2020
Pre-turnaround computational modelling built confidence in the benefits of introducing design changes to a FCC regenerator revamp.
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Energy network monitoring and optimisation
Jun-2021
A software program for optimisation of an energy network supports decisions on equipment use in refineries that produce and import power.
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Production optimisation for refining and olefins: how best to achieve it
Aug-2022
To suceed, companies must decisively implement production optimisation strategies using the latest AI-driven technologies, like digital twins and prescriptive ...
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Using APC in refinery energy systems – develop your own solutions
Oct-2013
Advanced Process Control (APC) has been used extensively to assist in operating refinery and petrochemical processes smoothly, safely and profitably.
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Simulation of Claus unit performance
Nov-2019
Simulating a sulphur recovery unit using a fundamental approach enables the effects of process changes on a host of performance metrics to be reliably ...
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Optimising sweep gas flow in a flare header
Oct-2012
How to calculate the minimum flow of flare header sweep gas needed to maintain safe conditions
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Improving refinery distillation operations
Apr-2008
The outline of a route map or staged approach to unit process improvement follows similar steps to those taken when installing advanced controls on a ...
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Accuracy of measured lean amine H2S loading
May-2018
When solvent regeneration is done robustly the most accurate assessment of lean loadings can be by simulation rather than by measurement.
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Tube rupture in a natural gas heater
Feb-2016
Dynamic simulation supports the use of a pressure safety valve over a rupture disk in the event of a tube rupture
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The role of tail gas treating unit quench towers
Jun-2016
A quench tower cools gas entering a tail gas amine unit but also protects the amine against SO2 breakthrough.
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Monitoring and simulation resolves overhead corrosion
Mar-2016
Online corrosion monitoring in tandem with simulation modelling identified the root cause of corrosion in a crude unit overhead
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Simulating and monitoring H2 plant operations
Oct-2012
A computer program was developed to enable a refinery to monitor its hydrogen production daily to foresee potential operating problems
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Refining/petrochemical integration: a new paradigm
Sep-2013
The global trend in motor fuel consumption favours diesel over gasoline. There is a simultaneous increase in demand for various petrochemicals such as ...
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Boosting tube-side heat transfer
Jun-2021
Tube insert technologies can improve heat exchanger performance by enhancing tube-side heat transfer coefficients in two-phase applications.
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SRU simulation getting the properties right
Aug-2016
Reliable, predictive simulation software for SRUs requires recognition of many of the unique properties and behaviours of sulphur.
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Ammonia destruction in the reaction furnace
Nov-2016
A study based on reaction fundamentals aids a comparison of the advantages of one-zone and two-zone SRU reaction furnace design in ammonia destruction ...
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Impact of light tight oils on distillate hydrotreater operation
Apr-2016
Addressing the range of challenges brought to diesel and jet production by light tight oil processing
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Nature of errors in machinery diagnostics
Jan-2020
A reliability theory has been developing for almost 70 years, and all the time scientists, engineers and practitioners attempt to point out an instance ...
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Study of CCRU first reformer reactor ∆P behaviour using multiple linear regression
Apr-2022
Determinants and explanatory variables affecting the behaviour of the first reformer reactor ∆P are identified, with the aim of controlling it and avoiding ...
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Nov-2022
Chemical absorption is both technically and economically feasible for biogas upgrading under atmospheric conditions, thereby avoiding the need for com ...
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Future refinery complexes built using an integrated approach
Nov-2022
Minimise risks of project design changes at later stages using process digital twins during the design phase.
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FCC unit yield improvement with artificial intelligence
Aug-2022
How closed loop neural networks have improved FCC yields via direct control and continuous optimization.
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Production optimisation for refining and olefins: how best to achieve it
Aug-2022
To suceed, companies must decisively implement production optimisation strategies using the latest AI-driven technologies, like digital twins and prescriptive ...
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Digital twin optimises FCC operations for real separator behaviour
Jun-2022
Digital twins based on process simulation models are invaluable for overcoming limitations in the design or operations phases to optimise plant profit ...
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Digital twins heat up the capabilities of energy storage plants
Jun-2022
How to support future energy security by enhancing energy storage with automated digital twins.
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Accelerating the digital transformation
May-2022
The energy and utilities (E&U) industry constantly changes and transforms to comply with government regulations, implement new technologies, and satisfy ...
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Study of CCRU first reformer reactor ∆P behaviour using multiple linear regression
Apr-2022
Determinants and explanatory variables affecting the behaviour of the first reformer reactor ∆P are identified, with the aim of controlling it and avoiding ...
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Model Based Definition: What is it and Why?
Apr-2022
Model Based Definition (sometimes Drafting or Dimensioning or Design) is an iteration to mechanical design that uses a CAD generated 3D model with dimensions, ...
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Value engineering: a continuous front-end process (ERTC)
Dec-2021
The concept of front-end loading of projects is not new, where robust planning and design early in a project’s lifecycle helps to influence changes in ...
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Modelling and optimising bitumen hydrocracking
Nov-2021
A rigorous hydrocracking model for the quoted catalysts is used for predicting hydrogen consumption and product yields to maximise operating revenues.
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Predicting process performance through an online platform
Sep-2021
Digitalisation has potential benefits across the oil and gas value chain. The InFocus™ Online Platform allows ExxonMobil Catalyst and Licensing LLC’s ...
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Improve profit with augmented digital twins
Aug-2021
Artificial intelligence and machine learning deliver greater, more sustainable value from simulation models.
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Energy network monitoring and optimisation
Jun-2021
A software program for optimisation of an energy network supports decisions on equipment use in refineries that produce and import power.
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Jun-2021
Upgraded crude scheduling enabled a refiner to increase its use of opportunity crudes for higher margin.
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Boosting tube-side heat transfer
Jun-2021
Tube insert technologies can improve heat exchanger performance by enhancing tube-side heat transfer coefficients in two-phase applications.
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Amine anomaly in a mild hydrocracker
Jun-2021
Simulation and operational changes help to crack the riddle of frequent amine carry-over from a high pressure amine absorber.
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Piping and instrument diagrams: Part 2 Causes and management of change
Apr-2021
It is difficult to categorise or group the many reasons for routine or late changes to a P&ID. Some causes are listed here.
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Mar-2021
Hybrid modelling combines artificial intelligence and processing expertise to develop accurate models of refining processes.
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Should you rely on your simulation results?
Dec-2020
Avoiding some of the pitfalls of process simulation
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Use of CFD modelling to improve burner design and operation
Dec-2020
Computational fluid dynamics (CFD) modelling can be used as an efficient and low-cost alternative to improve the design and operation of a new burner.
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Start-up and shutdown issues in sulphur processing
Nov-2020
Knowing the limitations of the sulphur unit and what may occur during start-ups and shutdowns helps to prevent damage.
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Modelling ensures a successful revamp
Nov-2020
Pre-turnaround computational modelling built confidence in the benefits of introducing design changes to a FCC regenerator revamp.
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ThruVision™ scans are the next step to investigate liquid maldistribution
Sep-2020
ThruVision™ technology allows for a complete understanding of liquid distribution, saving days of production losses and massive costs of a unit shut ...
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Pre-turnaround scans enable better critical path planning
Sep-2020
Tru-Scan™ and Tru-Grid™ Scan results help determine whether to enter a particular column during the turnaround outage or remove it from the critical ...
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