CO₂ capture performance of cement-modified carbide slag

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• 作者：Xiaotong Ma ; Yingjie Li ; Changyun Chi ; Wan Zhang…
• 关键词：Cement ; Carbide Slag ; By ; product of Biodiesel ; Calcium Looping ; CO2 Capture
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：34
• 期：2
• 页码：580-587
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Industrial Chemistry/Chemical Engineering; Catalysis; Materials Science, general; Biotechnology;
• 出版者：Springer US
• ISSN：1975-7220
• 卷排序：34

文摘

A novel and low-cost synthetic CO₂ sorbent for calcium looping process, cement-modified carbide slag (CMCS), was synthesized from carbide slag, aluminate cement and by-product of biodiesel by combustion. The effects of synthesis conditions such as combustion temperature, combustion duration, hydration, by-product of biodiesel and cement addition and regeneration temperature on CO₂ capture performance of CMCS were investigated. The comprehensively optimum preparation conditions of CMCS were obtained. The highest CO₂ capture capacity is 0.62 g/g after 10 cycles, which is 2.18 times as high as that of carbide slag. The addition of aluminate cement improves the CO₂ capture performance of CMCS, while excessive aluminate cement is adverse for CO₂ capture due to the reduced CaO content in CMCS. The addition of by-product of biodiesel contributes to a uniform sol mixing of carbide slag and cement. The CMCS exhibits higher carbonation and calcination rates than CS. The porous and stable pore structure leads to the better CO₂ capture performance and cyclic stability of CMCS.