Challenges related to transport of carbon dioxide in pipelines

Bjørnar Jensen successfully defended is PhD thesis; "Investigations into the impact of solid surfaces in aqueous systems” on Thursday March 3 2016 at the University of Bergen.

Capture and storage of carbon dioxide is a potentially vital tool for reducing greenhouse gas emissions. In Norway, a possibility will be to store carbon dioxide in depleted oil and gas reservoirs off the Norwegian coast. Transport of greenhouse gases would be possible via pipelines on the seabed.

Bjørnar Jensen , photo: privatUnfortunately, transport in pipelines is not totally without challenges. At low temperatures and high pressures, the water in the gas stream together with carbon could form an ice-like substance known as hydrate. Hydrates are a well-known problem in the oil and gas industry and can lead to clogged pipes with subsequent production downtime and dangerous situations.

Jensen has in his work contributed to design new models for predicting the formation of such hydrates. The new models take into account that water thrive better on iron, steel and rust than other materials such as plastic. The fact that water prefer the typical materials pipelines are made of and covered with, leads to an increased risk of formation of hydrate. This increased risk is not taken into account in the traditional methods.

Moreover, Jensen has looked into how removing water from the gas stream can prevent hydrate formation. Through modeling of surfaces materials, known as zeolites, he has shown that small variations in the surface can have a significant effect on how fast and to what extent water is taken up from the gas.

Jensen has, in his Phd, examined how different surfaces and distributions of partial charges govern the adsorption of water. The distribution of partial charges is, in modeling context, shown to be more significant than the actual termination of the surface. They also showed that traditional methods of predicting hydrate formation may be inadequate and underestimate the risks close to oxidized iron surfaces.

Bjørnar Jensen was born in 1980 and grew up in Oslo. He has a bachelor in oil and gas and master's degree in process technology - separation, both from the University of Bergen. In 2010, he began his doctoral thesis group for thermodynamic modeling at the Institute of Physics and Technology at the University of Bergen.

He has been supervised by Prof Bjørn Kvamme at University of Bergen institute of Physics and Technology UiB, read more about about Bjørnar Jensens PhD in Norwegian at UiB web site. His work has been related to SUCCESS through the integrated project INJECT.



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