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Preparation of rod‐like MgO by simple precipitation method for CO 2 capture at ambient temperature
Author(s) -
Tuan Vu Anh,
Lee Chang Ha
Publication year - 2018
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.201800013
Subject(s) - thermogravimetric analysis , sorption , materials science , precipitation , adsorption , bet theory , analytical chemistry (journal) , thermal stability , nuclear chemistry , chemical engineering , chemistry , chromatography , physics , meteorology , engineering
Rod‐like MgO was prepared by the simple precipitation method and subsequently evaluated for CO 2 capture efficiency under ambient‐temperature adsorption and intermediate‐temperature regeneration. The MgO precursor was analyzed by thermogravimetric analysis (TGA) and X‐ray power diffraction (XRD), it was decomposed completely at 500°C to form MgO. The as‐synthesized MgO samples were characterized by XRD, BET and FE‐SEM. The MgO samples were comprised of grains with an approximate length of 4‐6 μm and diameter of 0.5 μm. The BET surface area of MgO was 330.5 m 2 /g, which was much higher than that of commercial MgO (CM‐MgO, 103.2 m 2 /g). The CO 2 uptake on MgO samples were evaluated by TGA. As‐synthesized MgO had the high CO 2 sorption capacity compared to CM‐MgO. The effect of temperature on CO 2 sorption capacity was also investigated. In addition, the stability of sample was evaluated by cyclic experiment.