Critical path diagrams optimize FCC start-ups

James D. WeithPractical Enginuity, Mission Viejo, Calif.Critical path diagrams, which have evolved from logic diagrams, can help refiners optimize the timing of FCC start-ups. Those start-ups require that certain steps occur simultaneously before feed goes to the riser.This required timing or coordination is why establishing a critical path is valuable; it helps remove some of the inefficiencies from the individual steps for each section, so that the ultimate timing between them can be better synchronized.Logic diagrams illustrate the necessary sequences for starting an FCC. These logic diagrams then become the basis for the critical path diagram.While critical path diagrams are valid for...

Why Register?

Non-subscribers can only view whitepapers by providing name, home and email address, phone number and other information and comment on/rate articles.

Why Subscribe?

Oil & Gas Journal subscribers with login credentials can access these premium features of OGJ Online:

  • Current Issue – an html version of the current week's issue of Oil & Gas Journal.
  • Past Issues – An Electronic OGJ Archive. A keyword-searchable archive of all issues of Oil & Gas Journal dating back to 1990; also searchable by issue date.
  • Market Journal – a weekly round-up of the oil and gas markets, with observations from leading analysts.
  • Editor's Perspective – a short article of insight and opinion by the Editor of Oil & Gas Journal.
  • OGJ Industry Stats – quick access to current industry statistics from Oil & Gas Journal.
  • OGJ Survey Downloads - quick access to exclusive reports from Oil & Gas Journal.


Subscriber Help or Subscribe

Oil & Gas Journal Subscribers: Have your subscription number (from the mailing label on the cover of your Oil & Gas Journal) and e-mail address ready to set up your online account through Customer Service Assistant.

If you're not an Oil & Gas Journal subscriber, start a subscription and gain access to the subscriber areas of OGJ Online now.

Stay Connected