Session: MF-02-02 Materials for Hydrogen Service-Effect of Gas Impurities

Paper Number: 125124

125124 - Effect of Hydrogen as an Impurity on the Fracture Toughness and Fatigue Performance of Steels for Co2 Pipelines for Ccs 

Carbon Capture and Storage (CCS) is a key technology to mitigate emissions from hard to decarbonize industrial processes to meet net-zero objectives of the society. CCS involves capturing carbon dioxide (CO₂) emissions from industrial processes and storing them deep underground in geological formations. Since CO₂ emission sources are not typically located near suitable geological sites for CO₂ storage, transportation of captured CO₂ becomes a critical step in the CCS value chain. The most common method of transporting large quantities of CO₂ for CCS is through pipelines. In contrast to the transport of pure CO₂, impurities in the CO2 stream can potentially cause materials integrity challenges in terms of corrosion, fracture toughness and fatigue performance.

Specifically, CO₂ streams from pre-combustion capture of Blue Hydrogen production, for example from steam methane reforming (SMR) can contain hydrogen as an impurity in the stream. Therefore, it is important to understand how much hydrogen can be tolerated as an impurity in the CO₂ stream without compromising the integrity of CO₂ pipelines. However, the impact of H₂ impurity in the CO2 stream on fracture toughness and fatigue behavior is not well understood. This study will report on the fracture toughness and fatigue performance of line pipe steels in CO₂ with H₂ as an impurity is compared to the behavior in air and pure H₂ conditions.

Presenting Author: Hyun Jo Jun ExxonMobil Technology and Engineering Company

Presenting Author Biography: Dr. Jun is Lead Materials Scientist at ExxnoMobil Technology and Engineering Company. He earned Ph.D from POSTECH, South Korea on physical metallurgy, and worked on steel industry and Oil/Gas industry.

Authors:

Hyun Jo Jun ExxonMobil Technology and Engineering Company
Neeraj Thirumalai ExxonMobil Technology and Engineering Company
Chih-Hsiang Kuo ExxonMobil Technology and Engineering Company
Brian Newbury ExxonMobil Technology and Engineering Company
Ramgopal Thodla DNV