CO green technologies in CO capture and direct utilization processes: methanation, reverse water-gas shift, and dry reforming of methane

• Published in: Sustainable energy & fuels Vol. 4; no. 11; pp. 5543 - 5549
• Main Authors: Jo, Seong Bin, Woo, Jin Hyeok, Lee, Jong Heon, Kim, Tae Young, Kang, Hu In, Lee, Soo Chool, Kim, Jae Chang
• Format: Journal Article
• Language: English
• Published: 27.10.2020
• ISSN: 2398-4902
• DOI: 10.1039/d0se00951b

CO 2 green technologies, such as methanation, reverse water-gas shift (rWGS), and dry reforming of methane (DRM), in CO 2 capture and direct utilization processes are proposed to reduce the total thermal energy by effectively combining CO 2 capture and conversion using Ni/CaO catal-sorbents. Compared to conventional calcium looping using CaO-based sorbents, carbonated Ni/CaO catal-sorbents are completely regenerated at lower temperatures by simultaneously converting the captured CO 2 into chemicals via methanation, rWGS, or DRM. At optimum temperatures and concentrations of the feed gas (H 2 or CH 4 ), the Ni/CaO catal-sorbents show excellent CO 2 capture capacity and productivity. In addition, the structural variation of the Ni/CaO catal-sorbents is elucidated. Based on these theoretical and experimental studies, the novel integrated CO 2 capture and direct utilization processes can be a promising technology to produce chemicals as well as mitigate CO 2 levels from large-scale sources. CO 2 green technologies, such as methanation, reverse water-gas shift (rWGS), and dry reforming of methane (DRM) in CO 2 capture and direct utilization process are developed using Ni/CaO catal-sorbents.