Understanding the competition between carbonation and sulfation of Li4SiO4-based sorbents for high-temperature CO2 capture

Recycling Spent LiFePO4 Battery to Prepare Low-Cost Li4SiO4 Sorbents for High-Temperature CO2 Capture

“…Generally speaking, pure CO 2 is obtained through various capturing methods and is then stored geologically or used in food industry, liquid or gaseous fuels synthesis, and oil extraction. − Chemisorption based on recyclable solid sorbents has been intensively studied and has gradually emerged as a sufficiently competitive carbon capture method. Particularly, Li 4 SiO 4 is considered as a promising high-temperature sorbent for its high adsorption capacity (approximately 0.3 g/g) and the excellent cyclic stability . Till now, extensive work has been done to make it practical by unraveling CO 2 adsorption/desorption mechanisms, enhancing adsorption performance, and extending the adaptability of Li 4 SiO 4 -based sorbents under various industrial scenarios .…”

“…Particularly, Li 4 SiO 4 is considered as a promising high-temperature sorbent for its high adsorption capacity (approximately 0.3 g/g) and the excellent cyclic stability. 24 Till now, extensive work has been done to make it practical by unraveling CO 2 adsorption/desorption mechanisms, enhancing adsorption performance, and extending the adaptability of Li 4 SiO 4 -based sorbents under various industrial scenarios. 25 The main limitation for CO 2 capture by Li 4 SiO 4 is the high cost of lithium precursors, which becomes even severer with the rocketing price of lithium materials due to the strong demand in lithium battery industry.…”

Simplifying and Optimizing Li4SiO4 Preparation from Spent LiFePO4 Batteries with Enhanced CO2 Adsorption

“…High-temperature adsorption is one typical CO 2 capturing method in a variety of CCUS technologies, where sorbent is adopted to perform cyclic CO 2 adsorption and desorption so as to achieve CO 2 capture and enrichment . Li 4 SiO 4 has good application prospects in high-temperature CO 2 capture because of its high adsorption capacity (theoretically 36.5 wt %), good regeneration performance, , and rapid adsorption/desorption kinetics. − However, its potential applications are largely limited by the high cost of lithium resources. Meanwhile, as demand from the lithium industry continues to rise, there will be a long-term shortage of lithium resources, which is the most important reason for the recent sharp increase in the price of lithium .…”

Synergistic promotions of K doping on CO2 capture and in situ conversion

“…[7][8][9][10][11] However, the high operating temperature above 700 C not only aggravates the sintering of sorbents and catalysts, 12 but also makes it more costly and challenging for large-scale industrial deployments due to the strict heat-resistant requirements for the installation materials, the high energy consumption, and the safety issues. 5,[13][14][15] In contrast, the alkaline ceramic materials, such as Li 4 SiO 4 through the lithium-looping (LiL, Li 4 SiO 4 + CO 2 $ Li 2 SiO 3 + Li 2 CO 3 ), [16][17][18][19] exhibit a high CO 2 capture capability and excellent cycle stability in a relatively lower temperature range of 500-600 C. [20][21][22][23] To match this CO 2 capture temperature, the revised water gas shift (RWGS) reaction can be a more promising choice than the dry reforming of methane (700-800 C) and CO 2 methanation (300-400 C) for the in situ CO 2 conversion. [24][25][26][27][28] However, there is few research working on the LiL@RWGS-based iCCC technology, which can be caused by the scarcity of lithium resources due to the fast development of lithium-ion batteries (LIBs).…”