Novel cryogenic carbon dioxide capture and storage process using LNG cold energy in a natural gas combined cycle power plant.

[Display omitted] • Amine CCS process is an energy-intensive system, increasing efficiency penalty. • Cryogenic CCS process is proposed to reduce efficiency penalty of NGCC power plant. • LNG cold energy is utilized to capture and store CO 2 in the solid phase. • The efficiency penalty is reduced from 14.34% to 3.51%. This study proposes a novel cryogenic CO 2 capture and storage (CCS) process using liquefied natural gas (LNG) cold energy in a natural gas combined cycle (NGCC) power plant. This study makes two major contributions to the literature. First, the cryogenic solid-phase CCS process using LNG cold energy can effectively reduce the efficiency penalty in NGCC power plants by solving the fundamental problems associated with the conventional CCS process: energy-intensive thermal treatment of the monoethanolamine-based absorption process and significant power consumption for compressing CO 2 to 150 bar. Second, the cryogenic CCS process requires minimal equipment installation in the NGCC power plant by integrating LNG cold energy utilization and CO 2 capture processes. The proposed cryogenic CCS process reduces the efficiency penalty from 14.34 % to 3.51 %, with a 99.93 % CO 2 capture rate. We believe this study will provide a novel guideline for reducing the efficiency penalty by overcoming the challenges of the conventional CCS process. [ABSTRACT FROM AUTHOR]