A new method of processing CO2 and magnesite slag simultaneously

Na Yang, Ping Ning, Kai Li, Jun Ya Wang

Abstract


Calcining magnesite slag to capture CO2 is a new and simple method of processing CO2 and magnesite slag simultaneously. In this work, the CO2 capture capacity by calcined magnesite slag in wet flue gas simulated by adding water vapour was investigated. The magnesite slag exhibits excellent CO2 adsorption per­formance, with 3.01 mmol/g CO2 adsorption capacity, which is reduced to 2.18 mmol/g after 8 cycles and is obvious superior to magnesite. The structure and characterization of the magnesite slag are examined by XRF, FT-IR, TG-DSC, XRD, CO2-TPD and BET. It can be confirmed by X-ray fluorescence analysis that the key component of magne­site slag is MgSiO3 and MgCO3. The results of this work indicate that the magnesite slag is an available adsorbent for CO2 ads­orption after calcination.


Keywords


greenhouse gas; calcined condition; slag; adsorption capacity

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DOI: https://doi.org/10.2298/JSC180528077Y

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