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| Relationship between pore structure and hydration activity of CaO from carbide slag | |
| Zhang, Junqiang1; Zhang, Shu2; Zhong, Mei3; Wang, Zhi1; Qian, Guoyu1; Liu, Junhao1; Gong, Xuzhong1,4 | |
| 2019-11-01 | |
| Source Publication | CHINESE JOURNAL OF CHEMICAL ENGINEERING
 |
| ISSN | 1004-9541 |
| Volume | 27Issue:11Pages:2771-2782 |
| Abstract | CaO needs to show high activity to be used as Ca-sorbent and slagging agent. Hydration activity is an important characteristic to evaluate the activity of CaO. In this study, carbide slag from polyvinyl chloride (PVC) industry was utilized as precursor for preparing high activity CaO. The roles of crystallite grain, average pore diameter (APD) and volume fraction of pore <200 nm in diameter (VF200) in hydration activity of CaO from carbide slag (CS-CaO) were respectively investigated. The hydrolysis kinetics model of CaO shows a three-dimensional spherically symmetric diffusion model (D4), which suggests that hydration activity was mainly associated with APD and VF200 of CS-CaO with limited correlation to the crystal size. Specifically, the hydration activity of CS-CaO is increased with increasing VF200, while decreased with increasing APD. Under the invariable calcination temperature, the core-shell structure formed by the addition of graphite or CaCO3 to CS effectively inhibits the sintering of CS-CaO and improves VF200. Consequently, the hydration activity of CS-CaO increased from 22.79 degrees C. min(-1) to 27.19 degrees C. min(-1) and to 29.27 degrees C. min(-1) with addition of 5% graphite or 5% CaCO3 into carbide slag, respectively. (C) 2019 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved. |
| Keyword | Carbide slag CaO Hydration activity Sintering Pore volume fraction |
| DOI | 10.1016/j.cjche.2019.02.024 |
| Language | 英语 |
| WOS Keyword | CO2 CAPTURE PERFORMANCE ; LIMESTONE CALCINATION ; POSTCOMBUSTION CO2 ; BY-PRODUCT ; CALCIUM ; SORBENT ; CARBONATION ; HCL ; TEMPERATURE ; COMBUSTION |
| Funding Project | National Natural Science Foundation of China[U1610101] ; National Natural Science Foundation of China[51422405] |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Chemical |
| Funding Organization | National Natural Science Foundation of China |
| WOS ID | WOS:000506862600018 |
| Publisher | CHEMICAL INDUSTRY PRESS CO LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/38715 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Zhang, Shu; Gong, Xuzhong |
| Affiliation | 1.Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China 2.Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Peoples R China 3.Xinjiang Univ, Coll Chem & Chem Engn, Key Lab Coal Clean Convers & Chem Engn Proc Xinji, Urumqi 830046, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Junqiang,Zhang, Shu,Zhong, Mei,et al. Relationship between pore structure and hydration activity of CaO from carbide slag[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2019,27(11):2771-2782. |
| APA | Zhang, Junqiang.,Zhang, Shu.,Zhong, Mei.,Wang, Zhi.,Qian, Guoyu.,...&Gong, Xuzhong.(2019).Relationship between pore structure and hydration activity of CaO from carbide slag.CHINESE JOURNAL OF CHEMICAL ENGINEERING,27(11),2771-2782. |
| MLA | Zhang, Junqiang,et al."Relationship between pore structure and hydration activity of CaO from carbide slag".CHINESE JOURNAL OF CHEMICAL ENGINEERING 27.11(2019):2771-2782. |
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