Chemical Engineering Journal 336 (2018) 710–720 Contents lists available at ScienceDirect Chemical Engineering Journal journal homepage: www.elsevier.com/locate/cej Controlled synthesis of MgO with diverse basic sites and its CO capture mechanism under diﬀerent adsorption conditions a,b a,b a,b, Wanlin Gao , Tuantuan Zhou , Qiang Wang College of Environmental Science and Engineering, Beijing Forestry University, 35 Qinghua East Road, Haidian District, Beijing 100083, PR China Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: Mesoporous MgO adsorbents with diverse basic sites were prepared via a urea hydrolysis synthesis method for Magnesium oxide CO capture. With elevated hydrolysis temperatures, the phase transition process made great contributions to the Urea hydrolysis morphological changes of the precursor architectures. In situ DRIFTS analysis demonstrated that various car- Basic sites bonate surface species including bicarbonate, bidentate, and unidentate carbonates were formed on the obtained CO capture mechanism MgO during interaction with CO . Furthermore, the main component of adsorbed CO surface species swings 2 2 from bicarbonate to bidentate and unidentate carbonates with increase of adsorption temperature. The highest −1 CO uptake
Chemical Engineering Journal – Elsevier
Published: Mar 15, 2018
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