Ships emit a considerable amount of carbon dioxide (CO2), accounting for around 3% of total human-caused CO2 emissions. With few alternatives for reducing their carbon impact, a unique technology suggests that ships could absorb CO2 emissions via a naturally occurring chemical reaction. This process includes bubbling exhaust through saltwater and limestone, converting CO2 to stable bicarbonate minerals that may be released back into the ocean. However, the environmental consequences of this method are uncertain. <\/p>\n\n\n\n
For billions of years,\u00a0the ocean has regulated atmospheric CO2 levels through a natural interaction between CO2 and calcium carbonate (limestone).\u00a0This mechanism is crucial for maintaining the carbon balance in the Earth’s atmosphere and oceans. When water accumulates CO2, it turns acidic. This increased acidity promotes the dissolution of calcium carbonate, also known as limestone, into its ions. The dissolved limestone\u00a0subsequently\u00a0combines with the carbon dioxide (CO2)<\/a> in the water, producing bicarbonate (HCO3-) crystals that can survive in the ocean for centuries. This process is an organic process that assists the planet in eliminating carbon dioxide (CO2) from its atmosphere over extended\u00a0periods, and it is an\u00a0important\u00a0part of the worldwide carbon cycle.\u00a0<\/p>\n\n\n\n Researchers discovered that raising the concentration of carbon dioxide (CO2) absorbed by limestone could accelerate the natural process. According to Jess Adkins of Calcarea, the startup behind the technology, employing pure CO2 accelerates the process by an order of magnitude. By artificially increasing this process,\u00a0more carbon dioxide can converted\u00a0into persistent bicarbonate minerals more quickly and efficiently.\u00a0<\/p>\n\n\n\n Adkins and his colleagues created prototypes to demonstrate the viability of this method. Tests in California demonstrated that these early versions could turn at least 30% of the carbon dioxide (CO2) in the exhaust of diesel engines into bicarbonate. This positive outcome prompted additional cooperation with the research department of Lomar Shipping, a major shipping firm, to test the technology on a ship. <\/p>\n\n\n\n The on-board testing involves squashing the engine exhaust and running it through\u00a0significant amounts of\u00a0seawater. The\u00a0motion of the ship\u00a0functions as an organic water pump, lowering energy use. The highly acidic seawater then streams over crushed limestone, producing bicarbonate, which\u00a0then\u00a0flows back into the ocean. This system\u00a0is intended\u00a0to be more environmentally friendly and adaptable than existing carbon capture methods. <\/p>\n\n\n\n Traditional techniques frequently necessitate storing captured pollutants on board and discharging them at specialized\u00a0ports\u00a0which\u00a0may be logistically demanding and space-intensive.\u00a0whereas\u00a0the Calcarea system incorporates carbon dioxide capture and conversion immediately into the vessel’s operations. Despite its effectiveness, the system\u00a0is estimated\u00a0to use approximately 4% of the space on a big bulk carrier ship over a long cruise. This space need is relatively small compared with other capture of carbon technologies.\u00a0<\/p>\n\n\n\nModel Development and Testing:<\/h3>\n\n\n\n
Possible Challenges and Environmental Issues:<\/h3>\n\n\n\n