On the issue of neutralizing carbon dioxide at processing coal in boilers of thermal power plants

Bayandy Dikhanbaev, Arystan Dikhanbaev, Marat Koshumbayev, Sultan Ybray, Almagul Mergalimova and Aleksandar Georgiev

Energy, 2024, vol. 295, issue C

Abstract: The aim of the work is to predict 100% decarbonization of power plant's flue gases; to recover carbon from CO2 in in-situ mode; to extract valuable metals from ash; and to process ash and converter slag into stone casting. The novelty of the work is the development of a system for the integrated processing of coal in a smelter reactor by using high-temperature off gases in a boiler; carbon splitting according to the formula CO2 + 2Zn = 2ZnO + C, with the return of “C" to the system; sublimation of Zn from ZnO using a highly efficient counter-impacting jet method. Experiments carried out in a smelter have shown, the degree of reduction of germanium and zinc from slags ∼70%. The specific energy consumption is 2–3 times lower than in an acting analog. In a pessimistic scenario, the net profit of the system will be sufficient to purchase the missing electricity for the distillation unit: for the 60% carbonization of CO2, at the cost of electricity from wind turbines $46.3/MWh; in order to fully decarbonize CO2 - $31.8/MWh. The system's payback period will not exceed 6–8 years, with the expected net profit of $21,660,860/y.

Keywords: Ash; Sublimates of rare non-ferrous metals; Dust-like gold; Reactor inversion phase; Decarbonization (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:295:y:2024:i:c:s0360544224007503

DOI: 10.1016/j.energy.2024.130978

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