Your takeaways


Inprocess staff participate in congresses, meetings and events where we explain our successes and work in general in the form of presentations and reports.

In this section you can find a variety of informative articles which are free to download.


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    Refinery Pre-heat Train Monitoring and Cleaning Tool

    Stephen Wagner, Hiren Shetna (Saudi Aramco), Manel Serra and Maria Jesus Guerra (Inprocess)


    Aspentech Users Group Meeting (Optimize2013)


    Abstract / Summary
    Joint oral contribution to the Aspentech Users Group Meeting (Optimize2013) held in May 2013 in Boston, USA

  • inprocess Imitate to understand

    Imitate to understand

    José María Nougués, Michael Brodkorb and Josep-Anton Feliu


    2012. Hydrocarbon Engineering, May, pages: 92-96


    Abstract / Summary
    Over the past 10 years the use of dynamic process simulation has been established as a reliable and effective tool to analyse transient behaviour of process systems.

    Centrifugal compressor systems show performance characteristics that mainly depend on the operating point imposed on them by the process units and the connection piping around the compressor.

    Large compression systems often have several compressors operating in parallel, with some of them in standby. Therefore, even in normal operation there are frquent start up and shut down operations while switching between compressors: to accommodate throughput changes, for example. The transient analysis of these operations is critical in the evaluation of the dynamic behaviour of the compressor system and the associated control and safety systems.

  • inprocess Dynamics break the bottleneck

    Dynamics break the bottleneck

    Prabhat Panigrahy, Jens Balmer, Miquel Àngel Alós, Michael Brodkorb and Brian Marshall


    2011. Hydrocarbon Engineering, September, pages: 93-95


    Abstract / Summary
    Flare and relief systems commonly found in processing plants in the oil, gas and petrochemical industries are constantly under examination.

    New constructions, the extension of existing plants or changes in safety regulations all require a detailed analysis of several aspects of the flare and relief system. In many cases, steady state analysis will suffice; but, more often than not, complex or marginal problems require dynamic analysis to resolve an apparently bottlenecked flare system.

    This approach has recently been successfully applied to analyse and improve the blow down strategy for an existing gas utilisation plant (GUP) owned and operated by Wintershall in Libya.

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    Use of Simulation for Optimum Performance of Hydro-desulfurization Unit with ULSD Regulations – An Industry White Paper

    Marta Yugo, Amaia de Manueles, Francisco Alonso, Martin Santos, Miguel A. García, and Antonio López-Rodríguez (Repsol), Michel Manzulli (Aspentech), and Josemaria Ferrer (Inprocess)


    Aspentech’s Industry White Paper (2011 - The content of this paper originally appeared in Oil & Gas Journal, October 4, 2010)


    Abstract / Summary
    The European Union 10-ppm sulfur fuel regulations present various challenges for operating and controlling refinery desulfurization units. Repsol has been using simulation to mitigate some of these challenges.

    In a joint project with AspenTech, the two companies developed a rigorous steady-state and dynamic Aspen HYSYS® model of Repsol’s Puertollano refinery’s hydrodesulfurization (HDS) unit. This model was further integrated with the unit multivariable predictive controller (MPC), Aspen DMCplus®, which helped investigations of reactor conditions and operations to establish better control strategies. This paper presents an account of the project and some lessons learned.

  • inprocess Are there alternatives to an expensive overhaul of a bottlenecked flare system?

    Are there alternatives to an expensive overhaul of a bottlenecked flare system?

    Detlef Gruber and Dietmar-Uwe Leipnitz (BP Lingen Refinery), Prasad Sethuraman (BP Refining Technology), Miquel Àngel Alós, José María Nougués and Michael Brodkorb (Inprocess)


    2010. Petroleum Technology Quarterly (PTQ), January, pages: 93-95


    Abstract / Summary
    There are different situations in which it is necessary to re-evaluate the capacity of a site's existing flare system. In general, this is necessary following a potential increase in flare load, e.g. when:


    • Relief Valves that currently blow to air and that need to be connected to the flare header,
    • Changes in regulation that redefine the scenarios for which the flare system has to be designed,
    • New plants that are connected to the existing flare header, or
    • Throughput increase / revamps of existing plants that might increase the flare load through higher hold-up or higher heat load.


    In this article, the authors give an overview of the advantages of the approach of using dynamic simulation to calculate flare loads following API 521, give guidance on when and where to apply it, and describe a case study of a recent study at BP’s Lingen refinery in Germany.