Final Co-op PresentationMegan Macciomei

Tech Service Co-op Fall 2015Supervisor: Joe Murowany/Jocelyn Hicks Mentor: Nathan Hoffman

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Overview

• Personal Background

• Project Overview

• My Experience and Future Plans

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Personal Background

Michigan State University– Major: Chemical Engineering– 3rd year– Expected Graduation: May 2018

First Co-op term with Marathon PetroleumActivities

– AIChE– Society of Women Engineers– Usher at Breslin for MSU Basketball– Cross Country– Marathon training

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Projects

Alky Coalescing Media

Alky Caustic Wash Steam Exchanger

Nitrogen Pressure Study

Minor Projects

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Alky Coalescing Media

Purpose:– Install coalescing media in the acid settlers in the alkylation unit

Background:– Current acid settlers do not effectively separate the sulfuric acid and

hydrocarbon

– Coalescing media is designed to distribute the emulsion

– Inability to effectively separate within the settlers results in acid carryover

– Downstream corrosion

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Alky Coalescing Media

Actions:– Provide justification

– Data from other refineries

– Projected improvements• Estimated 87% reduction in acid

carryover

– Economic evaluation• Acid Savings ($18,500/year)

• Caustic Savings ($25,300/year)

– Evaluate alternatives

– Collaboration with Stratco

– Completed ER

– Approved project charter

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Alky Coalescing Media

Moving forward:– Project DSP in development with

Engineering for 2018 implementation upon approval

Takeaways:– Economic evaluation

– Reliability justification

• Acid carryover within the unit

– Seek knowledgeMedia assembled outside the unit

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Alky Caustic Wash Steam Exchanger

Purpose:– Maintain a minimum of 120°F before the DIB Caustic Wash on the Alkylation

unit to effectively neutralize sulfuric acid and caustic

Background:– Caustic heated with alkylate in 9E37A/B

– Unable to currently reach the 120°F in the winter months (higher RVP)

– Insufficient heating leads to acid carryover

– Contributes to downstream corrosion, DIB feed line failure

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Alky Caustic Wash Steam Exchanger

Actions:– Compile justification– Economic evaluation

• 2014 DIB Feed Line Failure• Lost Opportunity: $508,657

– Evaluation of alternatives– Exchanger sizing and design

• Process design technologist

– Review tie-in points– Collaboration with Stratco– Completed ER– Approved project charter

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Alky Caustic Wash Steam Exchanger

Moving forward:– Project DSP in development with Engineering for 2018 implementation if approved

Takeaways:– Established relationship with Stratco

– Communication with Tech Service, Engineering, Operations, etc.

– Develop critical thinking and technical knowledge

– Understanding the unit

Both Projects:– Upon approval, there is an estimated improvement in reliability and acid/caustic savings.

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Nitrogen Pressure Supply Study

Purpose:– Evaluate the current nitrogen supply in Melvindale and Complex 2

Background:– Study meets requirements of Hazop recommendation R20141768-002

– Critical Nitrogen Pressure Needs:

• Complex 2 oxygen skids on each SRU Thermal Reactor

• Melvindale ethanol unloading pump

• Melvindale pentane loading arms

– Pressure reducing regulator in Complex 5 before Melvindale Tank Farm

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Nitrogen Pressure Supply Study

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Nitrogen Pressure Supply Study

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Nitrogen Pressure Supply Study

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Nitrogen Pressure Supply Study

Results:– Issued memo that satisfies Conceptual DSP for project (EJN 14-107)

Future Actions/Recommendations– Replace reducing regulator with back-pressure regulator– Study on upstream portion of East Plant nitrogen– Flow/Pressure indication to DCS – improved troubleshooting

Takeaways– Experience with Operations– Best ways to present data and information– Understanding pressure regulators and their purpose

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October 2015 Turnaround Opportunities

Complex 6 Sour Water StripperAlky Contactor Bundle PullGOHT Reactor Catalyst LoadingHeaters

– Complex 1 Vac Heater– Coker Furnace

Complex 6 SRU Thermal ReactorMBR Tours

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Minor Projects

9V41 Alky Condensate Pot overflow

East Plant Nitrogen User List

7V112 Pressure Controller

Cx2 SWS Fan Motor Adjustment

Flow Surveys: 5E18, 9E55A/B

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My Experience

Technical knowledge developmentCritical thinking developmentManaging prioritiesInvolvement with Area TeamInteraction with Tech Service

Future:MSU for Spring 2016 semester2016 Summer Co-op

– Detroit Refinery: PSM

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Thank You

Special Thanks:– Mentor: Nathan Hoffman– Supervisors: Joe Murowany and Jocelyn Hicks– Manager: Jeremy Theiss– Tech Service

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Questions?