ertc: crude flexibility, sodium reduction and amine ... · 1st stage of desalter eb and reactive...
TRANSCRIPT
Innovation isn’t just what we do. It’s who we are.
ERTC: Crude Flexibility, Sodium Reduction
and Amine Removal using Reactive Adjunct
Athens, Greece
13th-15th November 2017
Innovation isn’t just what we do. It’s who we are.
Agenda
• Role of effective crude desalting
• Reactive Adjunct Chemistry Development
• Reactive Adjunct – In the Lab
• Application Strategies
• Reactive Adjunct – In the Refinery
Innovation isn’t just what we do. It’s who we are.
Desalters are the 1st
line of defense
Remove water, salts, solids, amines & metals
Protect the crude unit
Maximize throughput
Maintain unit reliability
Enhance Crude Flexibility
Emulsion Breakers
• Multi-functional, engineered proprietary resins
• Developed for today’s crude challenges
• Demonstrated synergism with our Reactive Adjunct
Innovation isn’t just what we do. It’s who we are.
Importance of Rag Layer Removal
• Rag Layers hinder operation
– Water cannot come down into Brine • Contributes to increase in column
tower ΔP
• Increased energy consumption
– Oil cannot come into Crude
– Reduces crude availability to be processed • Reduction in overall ROI – waste
https://www.google.com/patents/US20130104772
Innovation isn’t just what we do. It’s who we are.
Brine Tryline #1 Oil Tryline #3 Tryline #2 Brine Tryline #1 Oil Tryline #3 Tryline #2
1st Stage of Desalter EB and Reactive Adjunct 2nd Stage of Desalter EB only, no reactive adjunct
Rag Layer Reduction with Reactive Adjunct
2 Stage Desalter, samples taken at same time
Innovation isn’t just what we do. It’s who we are.
Reactive Adjunct Desalter Chemistry
A new class of desalter chemistry (patent pending)
• Applied with emulsion breaker
• Provides step change improvement in desalting efficiencies
• Expands use of economically-advantaged opportunity crudes
• Reduces risk of overhead corrosion
• Improves existing wastewater treatment operations
• Offers a low cost, no capital expansion of existing desalting capacity
Desalter Efficiency
Crude Flexibility
Amine Removal
Innovation isn’t just what we do. It’s who we are.
Lab simulation – what do we see?
Reactive Adjunct applied at low dosage
Faster emulsion resolution for most API crude slates (14° to 40°)
Boosts emulsion breaker performance on tough blends and when processing slop
Especially beneficial in assets operated beyond design capacities
Blank
2ppm RA 1ppm RA
EB only
Blank EB @ 10 ppm EB with 1 ppm
(32°API Blend) Reactive Adjunct
Innovation isn’t just what we do. It’s who we are.
How Amines accumulate in system
Amine and Ammonia Cycle Crude Partitioning
Innovation isn’t just what we do. It’s who we are.
Amine Removal Strategy
This approach uses a high Reactive Adjunct dosage
What it Does
• Converts amines and ammonia to water-soluble imines
• Removes metals as non-scaling species
• By-products remain in the water
• Easy brine pH control (5.5 to 6.5)
Operating benefits
• Breaks the amine cycle without acid
• Avoids the safety risks of acid use
• Returns pH control in the Crude Tower Overhead
• Reduces corrosion risk
• Improves Waster water Treatment Plant operation
Innovation isn’t just what we do. It’s who we are.
Poll Question
Poll Question: In Desalter operations which is the most troublesome for your refinery?
A) High wash water pH
B) Oil Under-Carry
C) Water Carry-Over
Innovation isn’t just what we do. It’s who we are.
Case History 1: Small US Gulf Coast Refinery
Desalting Efficiency
Situation
• Heavy Canadian and local crudes (<18° API)
• High pH wash water (8+)
• High salts / high solids
• Excessive oil under-carry at the desalter
Evaluation
• 14-day EB and RA trial
• Focus on desalter performance
• Reduced slop make critical
Results
Comparable salt removal
Minimal oil under-carry
Substantially reduced program cost
24 hours later
Existing Program 35ppm EB
New Program 15ppm EB 1ppm RA
Innovation isn’t just what we do. It’s who we are.
Case History 2 - 200 MBPD Asian Refinery
Desalting Efficiency
Situation • Opportunity Crude blend (24 to 29° API) • Processing 2% slop • Operating at 15% over design rates • High pH wash water (>8.7) • Stabilized emulsions issues
Evaluation • 15-day Reactive Adjunct low-dosage trial • Focus on desalter performance
Results Efficiency increased from 91% to 93% Salt Out reduced by 25% Oil under-carry reduced by 56%
Innovation isn’t just what we do. It’s who we are.
Case History 3 : 125 MBPD US Gulf Coast Refinery
Amine Removal
Situation
• Opportunity Crude Blend (28-30° API)
• High pH wash water (8+)
• High ammonia/amine content in SSW and crude tramp amines
• Desalter performance issues
• CTOH temperature limits due to amine salt corrosion history
Evaluation
• 21-day Reactive Adjunct trial
• Focus on amine/ammonia removal and CTOH impact
• No-harm focus at WWTP
Results
Wash water pH dropped to <7
Brine pH maintained at 7 to 7.5
10°C reduction in controlling CTOH salt point temperature
No impact at WWTP
Ammonia/ Amine Salt of
Reduction in Salt Point (oC)
NH3 10
MEA 20
MDEA 9
DMEA 10
Innovation isn’t just what we do. It’s who we are.
Case History 4 - 25 MBPD US Gulf Coast Refinery
Amine Removal
Crude Tower OH Baseline RA Trial
Ammonia 70 ppm 9 ppm
MEA 75 ppm 29 ppm
Chlorides 52 ppm 14 ppm
Ammonia salt point Reduced by 23°C
MEA salt point Reduced by 15°C
Desalter Parameter Baseline RA Trial
Wash Water MEA 75 ppm 10 ppm
Wash Water Ammonia 150 ppm 7 ppm
Brine pH 8.4 6.0
Solids Removal 29% 53%
Salt Removal 88% 91%
Metals Removal 63% 75%
Situation • Heavy Crude blend (<18° API) • High pH wash water (>8.7) • Oil under-carry issues limit desalting efficiencies • High CTOH amine levels and corrosion concerns
Evaluation • Reactive Adjunct high-dosage trial • Amine removal focus
Results Improved pH control in CTOH Significant amine/NH3 reduction in CTOH Substantial salt point temperature reductions Improvement in desalting performance
Innovation isn’t just what we do. It’s who we are.
Reactive Adjunct
A new class of desalting chemistry
Questions?