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Revamp Improves FCC Performance at BP's Texas City Refinery

BP Texas City revamped their No. 1 FCC main fractionator to improve fractionation, reduce pressure drop and lower naphtha sulfur content. Following the revamp the unit was able to increase capacity and operate at maximum conversion. Careful pre-engineering data gathering ...
Tags: FCCU

Pump Cativation Caused By Entrained Gas

Here’s how the problem was solved on an FCC main fractionator.
Tags: FCCU

FCC Reactor Vapor Line Coking

Identifying the causes, penalties and possible solutions to coking in the FCC reactor vapor line, particularly with regard to inlet nozzle coking affecting unit capacity, conversion, reliability and pressure and heat balance.
Tags: FCCU

Optimize Revamp Projects With A Logic-based Approach

Retrofitting processing units pose many obstacles. Test-run evaluations uncover limitations from existing infrastructures that can derail project goals.
Tags: FCCU

Specifications- Importance of Getting Them Right

Faulty equipment specifications sometimes carry unforeseen penalties, with loss of performance. But do not blame the original equipment manufacturer, say the authors- it is the process design engineer's responsibility to meet the objectives.
Tags: CDU, VDU

Crude Unit Start-up: Consequences of High Liqiud Level

Following a crude unit revamp high liquid level during start-up caused the heavy diesel product to turn black. Yet because the internals were designed for severe uplift, no damage occurred.
Tags: CDU, VDU

Improve FCCU Profitability- Bottoms System Upgrades

A review of process flow scheme fundamentals and basic equipment operating and design principles that have improved unit operating profitability through better use of capacity, higher conversion and lower cost maintenance.
Tags: FCCU

Low-capital Crude Unit Revamp Increases Product Yield

Crude unit revamps can sometimes yield large economic improvements with low-capital investment. In this case study, improving atmospheric crude column stripping section efficiency improved diesel yields and unloaded the downstream vacuum column ejectors, increasing VGO yield. The low-capital modifications made ...
Tags: CDU, VDU

Refiners Processing Heavy Crudes Can Experience Crude Distillation Problems

World heavy crude volumes are increasing, and as a result CDU/VDU operating problems and the frequency of unscheduled outages is also increasing. Conventional CDU/VDU designs will not operate reliably or profitably on the more challenging crudes. This article addresses problem ...
Tags: CDU, VDU, featured

Refiners Must Optimize FCC Feed Hydrotreating When Producing Low-sulfur Gasoline

Meeting lower gasoline product sulfur levels requires understanding sulfur distribution and species as function of the FCC gasoline boiling range. Gasoline pool sulfur limits can be achieved by minimizing contaminants in the cat feed hydrotreater (CFHT) feed and improving fractionation ...
Tags: FCCU