Background: The aim of this study was to elucidate the morphological characteristics of the muscle bundles of the flexor digitorum superficialis (FDS) (Folia Morphol 2015; 74, 4: 434-438)
Re-carbonation is investigated using NaOH-dissolved ethanol. Five hundred mL of recycled filtrates is obtained from a previous carbonation in which 3 g of NaOH has been replenished and dissolved. CO 2 is physically absorbed at each re-carbonation, and the amount decreases with increasing numbers of re-carbonation repetitions. However, the amount of CO 2 chemically absorbed that was consumed in the production of precipitates, such as sodium ethyl carbonates (SEC) and NaHCO 3 , slightly increases. This is due to the slight water that accumulates with repeated re-carbonation, which increases the generation of NaHCO 3 and the reaction time. The amount of precipitates and SEC composition decrease from the initial carbonation to the 22nd re-carbonation, and the amount of CO 2 fixed in the precipitates is calculated as a maximum of 0.92 g of CO 2 /g of NaOH at the initial carbonation, which then decreases linearly to 0.56 g of CO 2 /g of NaOH at the 22nd re-carbonation. However, 3.16 g of NaHCO 3 precipitates is repeatedly obtained from the 23rd re-carbonation, maintaining an ethanol concentration of 90.33 wt.%. Thus, 0.55 g of CO 2 /g of NaOH is fixed in this region. Therefore, CO 2 can be fixed in the SEC and NaHCO 3 precipitates via re-carbonation using NaOH-dissolved ethanol. K E Y W O R D S carbon capture and utilization/storage, carbon dioxide, climate change, mineral carbonation, re-carbonation 1 | INTRODUCTION Many studies have investigated the viability of carbon capture utilization/storage (CCUS) technology to directly reduce anthropogenic CO 2 emissions. 1-4 Among the many CCUS options available, CO 2 chemical absorption using alkanolamine-based solvents has been partially commercialized. 4-8 However, the process consumes high amounts of energy to generate the solvent and requires additional units to compress and liquefy the captured CO 2 for storage. In addition, for the CO 2 storage, the reservoirs are geologically limited in terms of safety and uncertainty. 9-12 Technology involving mineral carbonation or CO 2 mineralization,
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