Development of Mn/Mg-copromoted carbide slag for efficient CO2 capture under realistic calcium looping conditions
Development of Mn/Mg-copromoted carbide slag for efficient CO2 capture under realistic calcium looping conditions
复制标题
开发锰/镁共促进电石渣，以在现实的钙循环条件下有效捕获二氧化碳
DOI：
10.1016/j.psep.2020.05.051
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发表时间：
2020-09-01
影响因子：
7.8
通讯作者：
Wang, Zeyan
中科院分区：
文献类型：
--
作者：
Ma, Xiaotong;Li, Yingjie;Wang, Zeyan
Loss-in-capacity of carbide slag in CO2 capture restricts the development of industrial wastes in calcium looping technology. In this work, a novel Mn/Mg-copromoted carbide slag was prepared using carbide slag, dolomite and trace Mn(NO3)(2) additive. Experimental tests were carried out in the fixed-bed reactor to evaluate how the preparation and the reaction conditions influenced the CO2 capture performance of Mn/Mg-copromoted carbide slag during calcination/carbonation cycles. Results show that MgO diminishes the sintering of synthetic sorbents. The optimal Mn/Mg-copromoted carbide slag (mass ratio of CaO:MgO:MnO2 = 89:10:1) exhibits the highest CO2 capture capacity of 0.52 g/g after 10 cycles under the severe calcination condition (100 % CO2, 950 degrees C) and the wet carbonation condition (15 % CO2/20 % steam/N-2), which is 1.7 times as high as that of untreated carbide slag. MnO2 positively affects the slow carbonation stage by enhancing the electron transfer between CaO and CO2. Observations of the morphology of Mn/Mg-copromoted carbide slag indicate that the stabilized CO2 capture performance is mainly attributed to porous structure, MgO as the skeleton and MnO2 as an electron-transfer promoter. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
