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

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

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 17 January 2019

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 17 January 2019

What is New Technology? Technology Assessment according to DNV RP-A203 1: Proven technology 2 - 4: New Technology Technology Assessment according to DNV RP-A203 Cellulosic ethanol production Carbon capture Sulfuric Acid Plant 17 January 2019

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 17 January 2019

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 17 January 2019

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 17 January 2019

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 17 January 2019

Modeling Amine Absorption System Veevab and Aroonvilas, 2002 Limitations: Does not consider passivity, localized corrosion and does not consider Concentrated electrolytes and other components 17 January 2019

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 17 January 2019

Effect of Water on Corrosion Corrosion of carbon steel in MDEA From, T. Ramgopal et al., CEST 17 January 2019

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 17 January 2019

Effect of Water Water affects active-passive transitions 17 January 2019

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 17 January 2019

17 January 2019