Advancements and potentials of molten salt CO2 capture and electrochemical transformation (MSCC-ET) process

Sustainable Conversion of Carbon Dioxide into Diverse Hydrocarbon Fuels via Molten Salt Electrolysis

“…However, the applied or working temperature of the resulting molten salt mixture will also be high, which is not favorable for hydrocarbon production. 34 The production rate of hydrocarbons was investigated in KCl−LiCl molten salt (41−59 mol %) which was continuously flowing through ceramic tubes at the conditions of atmospheric pressure, 2 V, and 375 °C using feed gas containing H 2 O, CO 2 , and Ar (97.9, 2.1 and 0%). The formation of CH 4 (0.05%) and H 2 (2.4− 2.5%) gases were presented in Figure 4 The reaction of CO 2 with OH − can be confirmed in the molten chloride as the concentration of CO 2 was only 4.8% and the faraday efficiency was found to be 59.3%, as presented in Table 2.…”

Electrochemical conversion of CO2 into value-added carbon with desirable structures via molten carbonates electrolysis

“…Subsequently, researches on high value-added carbon nanomaterials prepared via molten carbonates electrolysis have been widely reported. [32][33][34] In summary, the technology for preparing carbon products by molten salt electrochemistry is becoming more and more mature. Compared with methods such as chemical vapor deposition (CVD) and arc discharge, the technology can also reduce costs by using renewable raw materials rather than conventional chemicals from the natural gas or petroleum industry.…”

Tunable Selectivity and High Efficiency of CO2 Electroreduction via Borate-Enhanced Molten Salt Electrolysis

“…Among various CO 2 reduction reaction (CO 2 RR) approaches, electrochemical reduction processes are a simple strategy that can operate under environment-friendly conditions, especially the ones driven by renewable electricity sources (e.g., solar, wind) ( Chen et al., 2018 ; Liu et al., 2019 ). Great attentions have been paid in various species of electrolytes in recent years, such as room temperature technologies (e.g., aqueous solutions, ionic liquids) ( Chen and Mu, 2019 ; König et al., 2019 ; Rosen et al., 2011 ; Zhu et al., 2016 ), and high-temperature processes (e.g., solid oxide electrolysis cells and molten salt electrolytes) ( Jiang et al., 2019 ; Song et al., 2019 ; Wu et al., 2018 ). Considering the fact that linear CO 2 molecule is thermodynamically stable, it is still a great challenge to meet the energy demand for navigating CO 2 RR toward desired products more efficiently.…”

“…In addition, molten salts are also being used as effective media for commercial thermal energy storage heated by concentrated solar power in the world today, a large amount of CO 2 can be reduced if a renewable electricity (e.g., solar, hydroelectric etc.) is applied, with a net CO 2 conversion efficiency of 70–98%, depending on the sources of electricity ( Jiang et al., 2019 ).…”