Academy Offers

AIChE members receive complimentary, unlimited access to live and on-demand AIChE webinars by purchasing them with their newly increased number of credits. See more resources.

Hydrocracker Reactor Temperature Controls for Greater Safety, Reliability and Profitability

Source: AIChE
  • Type:
    Conference Presentation
  • Conference Type:
    AIChE Spring Meeting and Global Congress on Process Safety
  • Presentation Date:
    May 1, 2013
  • Duration:
    30 minutes
  • Skill Level:
  • PDHs:

Share This Post:

Today’s hydrocarbon pricing means that hydrocracking units, already one of industry’s most demanding process control challenges, are being pushed to greater limits.  Hydrocracking reactors operate at elevated temperatures and pressures, making safety a constant concern.  Recovering from temperature upsets can take hours and recovering from a complete depressurization takes days, with heavy cost and operational impact.  Reactions are exothermic, so that even minor disturbances in feed, heater, or quench controls can rapidly escalate to an urgent situation.  For these reasons, hydrocrackers have always demanded vigilant attention to design detail, management of change, and operability.  Any oversights can result in, or fail to prevent, depressurization events.  Key improvements, on the other hand, can bring large gains in refinery reliability and profitability.

Hydrocracker process control strategy for the past two decades has focused on installing automatic depressurization systems and multivariable controllers (MPC).  While these have brought important gains, experience now shows this leaves many gaps in excursion control and depressure prevention.  This article presents an updated hydrocracker control model that robustly addresses traditional hydrocracker control challenges, overcomes outdated hydrocracker control paradigms, and allows hydrocrackers to operate safely, reliably, and profitably, under today’s and tomorrow’s ever more demanding conditions.

Once the content has been viewed and you have attested to it, you will be able to download and print a certificate for PDH credits. If you have already viewed this content, please click here to login.



Do you already own this?



AIChE Member Credits 0.5
AIChE Members $15.00
AIChE Fuels and Petrochemicals Division Members Free
AIChE Graduate Student Members Free
AIChE Undergraduate Student Members Free
Non-Members $25.00