1. New Process Qualification
Use of Electrolyte and Corrosion Models
Narasi Sridhar
October 2007

2. What is Technology Qualification
DNV’s definition of Technology Qualification:
“The process of providing the evidence that the technology will function reliably within specific limits”
17 January 2019

3. Why Technology Qualification?
Manufacturer/Designer of New Technology: Assurance of feasibility and fitness for purpose
Integrator of System: Assessment of system reliability
End-user: Selection of technology, ROI evaluation
Regulator: Confirmation of safety assessments
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4. QUALIFICATION OF NEW TECHNOLOGY
DNV-RP-A203 Qualification Procedures for New Technology
Describes a recommended work process for qualifying technology
A public document which can be applied by anyone
A revised version in draft form – apply to process qualification
DNV-OSS-401Technology Qualification Management
A description of DNV’s own services directed towards the work process in DNV-RP-A203
Internal objective: To unify the services within DNV worldwide
External objective: To support agreement of scope-of-work
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5. What is New Technology? Technology Assessment according to DNV RP-A203
1: Proven technology : New Technology
Technology Assessment according to DNV RP-A203
Cellulosic ethanol production
Carbon capture
Sulfuric Acid Plant
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6. Technology Qualification Management
Project Execution
Phase
Define Qualification Basis
Analysis and Testing
Reliability Assessment
Concept Improvement
Selection of Qualification Methods
Qualification Work Process
Technology Assessment
Probability of Success Evaluation (PoS)
Failure Mode Identification and Risk Ranking
Milestones
DNV deliverables
Use of simulation tools
Technology
Assessment
Report
Statement of
Feasibility TA
Technology
Qualification
Plan
Statement of
Endorsement
TQP
Certificate of
Fitness for Service
Technology
Qualification
Report
TQ?
Yes No NT
Fall-back
or hold
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7. Application of Models
New processes do not have well established performance history
Reliance on similar process experience
“Generic” equipment experience
Simulations can help
Understand process chemistry, speciation, other stream parameters
Identify materials performance issues through corrosion modeling
Identify data needs
Simulations need to be combined with field experience and laboratory data
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8. Example of Process qualification – CO2 Capture
Post combustion CO2 capture technologies involve well-known processes – amine absorption approach
New amines, proprietary activators, new design, etc.
Corrosion occurs in pre-absorption units through condensation of water
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9. Issues Effect of CO2 and water concentration
Effect of other gases (N2, O2, SOx, NOx etc.)
Effect of chlorides, hydrochlorides
Effect of flow and impingement
Effect of activators
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10. Modeling Amine Absorption System
Veevab and Aroonvilas, 2002
Limitations: Does not consider passivity, localized corrosion and does not consider
Concentrated electrolytes and other components
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11. Corrosion of CO2 Absorber Column
Corrosion observed opposite gas inlet point
Suspected water condensation along with chlorides and amines
No significant corrosion without water
From T. Ramgopal et al., to be Published in CEST
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12. Effect of Water on Corrosion
Corrosion of carbon steel in MDEA
From, T. Ramgopal et al., CEST
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13. Effect of Chloride
MEA hydrochloride increases active dissolution in the presence of water
Simulation of the hygroscopic tendency of the amine hydrochloride
Significant effect of hydrochloride compared to MDEA plus chloride (even with CO2)
Data from present work
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14. Effect of Water Water affects active-passive transitions
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15. Summary
DNV new technology qualification procedure is being used for process qualification
Electrolyte simulation tools, such as OLI Analyzers are useful in understanding the chemistry of processes
OLI Corrosion Analyzer may be used to simulate corrosion, thus extending the qualification capabilities
Laboratory electrochemical data needed
Populate the parameter database
Verify simulation results
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16. 17 January 2019