Green liquid fuel and synthetic natural gas production via CO2 hydrogenation combined with reverse water-gas-shift and Co-based Fischer-Tropsch synthesis. Issue 51 (September 2021)

• Record Type: Journal Article
• Authors: Gao, Ruxing; Zhang, Chundong; Jun, Ki-Won; Kim, Seok Ki; Park, Hae-Gu; Zhao, Tiansheng; Wang, Lei; Wan, Hui; Guan, Guofeng
• Is Part Of: Journal of CO₂ utilization. Issue 51(2021)
• Publication Date: 2021-09
• Subjects: Reverse water-gas-shift -- Fischer-Tropsch synthesis -- Process modelling -- Techno-economic analysis; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2021.101619
• Languages: English
• ISSNs: 2212-9820

Abstract

Highlights: The indirect PTL and PTL/PTG processes are proposed for CO2 mitigation. CO2 is transformed via the reverse water-gas-shift and CO2 methanation reactions. A comparative analysis of the indirect and direct PTL and PTL/PTG processes is conducted. The indirect PTL and PTL/PTG processes enhance the production of liquid hydrocarbons. The direct PTL/PTG and indirect P2L processes favor the energy efficiency and CO2 mitigation. Abstract: In recent years, significant attention has been paid to the CO2 mitigation via the power-to-liquids (PTL) and power-to-gas (PTG) processes because they can efficiently transform CO2 into high-value products such as liquid hydrocarbons and synthetic natural gas (SNG), and provide a promising solution for the storage of the intermittent renewable energy. Herein, we suggested a PTL process and a PTL/PTG process combined with the reverse-water-gas-shift (RWGS) and Co-based Fischer-Tropsch synthesis (FTS), which respectively produce liquid hydrocarbons only and the combination of liquid hydrocarbons and high-calorie SNG, based on the previous study regarding the PTL and PTL/PTG processes composed of Fe-based FTS. We conducted the process modelling and comparative techno-economic analysis to determine the key performance of the proposed PTL and PTL/PTG processes including the CO2 mitigation rate, energy efficiency, total product cost and CO2 mitigation cost. The proposed PTL and PTL/PTG processes can be regarded as feasible technical solutions to convert wasted CO2 into high-value liquid hydrocarbons and SNG. Additionally, the indirect PTL and PTL/PTG processes were helpful for improving the production of liquid hydrocarbons. Meanwhile, the direct PTL/PTG processes and indirect PTL processes favor the energy efficiency and CO2 mitigation.