Techno-Economic Feasibility of Post-Combustion CCUS Integration in existing LNG Plants: A Case Study of Oman LNG

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides a detailed methodology for techno-economic assessment of CCUS in LNG, including cost breakdown and sensitivity to capture rate.

🏢実務担当者:Offers realistic cost and technical insights for LNG operators considering CCUS retrofits, including space constraints and energy penalties.

🏛政策担当者:Demonstrates that abatement costs are high (USD 100-150/tCO2), underscoring the need for carbon pricing and regulatory frameworks to incentivize CCUS deployment.

The global drive towards decarbonization has increased interest in integrating carbon capture, utilization, and storage (CCUS) technologies into existing liquefied natural gas (LNG) facilities. CCUS has emerged as a key decarbonization pathway for hard-to-abate sectors, as demonstrated in the Sultanate's orderly transition toward net-zero strategy. Oman LNG is pursuing decarbonization in alignment with Oman Vision 2040 and the national target of achieving net-zero emissions by 2050. Over 86% of the company's Scope 1 emissions originate from fuel gas combustion in turbines and engines, where post-combustion CCUS presents a viable alternative to full electrification for reducing greenhouse gas emissions. This study presents a techno-economic feasibility assessment of post-combustion CO2 capture, utilization, and storage (CCUS) integration across the company's three LNG trains. The study assessed the technical feasibility of integrating CO2 capture to existing Turbine stacks, evaluation of capture technologies, waste heat recovery options and potential CO2 utilization and storage pathways within Oman utilizing future CO2 pipelines The pre-feasibility study of post-combustion CCUS followed a techno-economic assessment approach, including baseline emissions evaluation based on site actual reported data, review of capture, compression and dehydration technologies, energy and utility analysis, and economic modeling using estimation of capital and operational costs to determine the abatement cost per tonne of CO2. Key risks, opportunities, and the national CCUS readiness were also evaluated to assess the feasibility of deployment in Oman LNG's existing LNG trains Results indicate that post-combustion CCUS can achieve up to 90% capture efficiency, enabling abatement of approximately 2.4 MtCO2e per year—representing 84% of Oman LNG's Scope 1 emissions. Chemical absorption using amine solvents was identified as the most mature and commercially viable option. Integration scenarios examined included centralized and modular configurations with Waste Heat Recovery Units (WHRU) and pre-cooling systems to minimize energy penalties. Capital investment was estimated at USD 1–1.5 billion, with abatement costs ranging from USD 100–150 per tonne of CO2 The study identified technical challenges to retrofit existing turbine stack with waste heat recovery unit due to space constraints. Installing waste heat recovery unit was found to be essential to meet utility requirements for capture plant and to reduce OPEX. CCUS is capex intensive and economic viability will depend on CO2 pricing mechanisms, regulatory frameworks, and the availability of utilization or storage pathways within Oman. The methodology and findings can also guide feasibility assessments for other LNG trains and power plants, supporting broader decarbonization efforts across the sector.

• semanticscholar https://doi.org/10.2118/232326-msfirst seen 2026-05-23 05:43:02 · last seen 2026-05-27 04:58:01