Magnesium carbonate precipitate color12/13/2023 ![]() ![]() Among the key options to reduce CO 2 emissions and finally to meet the aforementioned goal, carbon capture and storage (CCS) technologies are considered to offer the greatest potential for CO 2 mitigation from the use of fossil fuels in coal- and gas-fired power plants and in industrial sites, which produce more than 40% of total greenhouse gas emissions. In the context of global awareness of this issue, in 2015 COP21, also known as the 2015 Paris Climate Conference, proposed an agreement to keep the global average temperature rise below 2☌ above preindustrial levels by limiting total carbon emissions in the atmosphere ( COP21, 2015). Surprisingly, the atmospheric level of CO 2 has reached a significantly symbolic milestone, 400 parts per million ( Scripps Institution of Oceanography, 2017), and moreover, a further continuous increase is expected for the foreseeable future in the absence of proper actions ( Kim et al., 2013). It is generally recognized that global warming is caused by the accumulation of greenhouse gases in the atmosphere, including CO 2 in particular. ![]() ![]() In this review, we present a summary of current knowledge and recent investigations entailing mechanistic studies on the formation of the precipitated CaCO 3 and the influences of the synthesis factors on the polymorphs. Various efforts to control and fabricate polymorphs of CaCO 3 have been made to date. Polymorphs and physicochemical properties of CaCO 3 strongly rely on the synthesis variables such as temperature, pH of the solution, reaction time, ion concentration and ratio, stirring, and the concentration of additives. Therefore, it is expected that this can partially offset the total cost of the CCS processes. The final products produced by the ex situ mineral carbonation route can be divided into two categories-low-end high-volume and high-end low-volume mineral carbonates-in terms of their market needs as well as their properties (i.e., purity). The transformation of CO 2 into a precipitated mineral carbonate through an ex situ mineral carbonation route is considered a promising option for carbon capture and storage (CCS) since (i) the captured CO 2 can be stored permanently and (ii) industrial wastes (i.e., coal fly ash, steel and stainless-steel slags, and cement and lime kiln dusts) can be recycled and converted into value-added carbonate materials by controlling polymorphs and properties of the mineral carbonates. Carbon and Energy Systems, School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, South Korea.Ribooga Chang Semin Kim Seungin Lee Soyoung Choi Minhee Kim Youngjune Park* ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |