Provaris and Yinson Production have completed the first phase of front-end engineering and design (FEED) for a proprietary liquid carbon dioxide (LCO2) tank and are proceeding to a second phase. The work is fully funded by Yinson, with the partnership governed by a joint development agreement signed in 2024.

Project Application and Goals

The newly designed LCO2 tank is intended for integration into Yinson’s 100,000 cubic metre floating storage injection unit (FSIU) for the Havstjerne carbon capture and storage (CCS) project offshore Norway. Yinson is a partner with Harbour Energy in this CCS scheme, which is forecast for a peak gross injection rate of 10 million tonnes per annum and a gross storage capacity of 200 million tonnes. A final investment decision for the project is expected this year. The development of such large-scale tanks is considered critical for commercialising CO2 supply chains, with the tank design also being suitable for LCO2 carriers and storage or terminal applications.

Tank Design Advantages and FEED Phase 2

The proprietary tank design has a capacity three to four times larger than existing tanks. This scaling aims to reduce the number of tanks required for FSIUs and CO2 carriers, thereby lowering both capital and operating costs. Yinson has sanctioned Phase 2 of the FEED, which is expected to run through to June. This phase will focus on finalising detailed engineering, conducting finite element modelling (FEM), performing testing to validate structural performance, designing the fabrication of the 25,000 cubic metre tank, and planning its integration with Yinson’s FSIU. Key milestones for this phase include achieving class approval and producing a fully costed fabrication facility and tank production cost estimate.

Partnership and Manufacturing

The FEED work began in August last year. The partnership has also signed a memorandum of understanding with China’s Himile Heavy Equipment to manufacture the LCO2 tanks at Himile's Rushan facility. Provaris reported that the first FEED phase was completed on schedule and within budget, with the overall development aiming to deliver efficient and cost-effective solutions for large-scale CO2 supply chains.