Volume 41, Issue 8 pp. 1577-1586
Research Article

CO2 Capture Performance of Portland Cement-Based Carbide Slag and the Enhancement of Its CO2 Capture Capacity

Jianjun Cai

Jianjun Cai

Xi'an Jiaotong University, Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, 710049 Xi'an, Shaanxi, China

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Shuzhong Wang

Corresponding Author

Shuzhong Wang

Xi'an Jiaotong University, Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, 710049 Xi'an, Shaanxi, China

Guangdong Xi'an Jiaotong University Academy, 528000 Foshan, Guangdong, China

Correspondence: Shuzhong Wang ([email protected]), Xi'an Jiaotong University, Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an, Shaanxi 710049, China.Search for more papers by this author
Ming Luo

Ming Luo

Jiangsu University, School of Energy and Power Engineering, 212013 Zhenjiang, Jiangshu, China

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Donghai Xu

Donghai Xu

Xi'an Jiaotong University, Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, 710049 Xi'an, Shaanxi, China

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First published: 22 May 2018
Citations: 11

Abstract

Carbide slag (CS) is a CaO-based waste with superior CO2 capture capacity. As it is usually recycled in the form of fine powder, the pelletization of CS is indispensable for its practical application. Here, commercial Portland cement (PC) was used as a cheap binder to produce PC-based carbide slag (PCCS) pellets and to enhance the mechanical strength of CS. The carbonation conversion of CS declined with the addition of PC, but the ability to resist sintering was improved. Prolonging the hydration time (HT) was effective in improving the CO2 capture performance of PCCS. During the thermal pretreatment of CS, the grain size of the CS increased with increasing thermal pretreatment temperature and time, but the mechanical strength of the CS increased.

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