relationshipbetweenporestructureandhydrationactivityofcaofromcarbideslag

CAS OpenIR

	relationshipbetweenporestructureandhydrationactivityofcaofromcarbideslag
	Zhang Junqiang 1; Zhang Shu 2; Zhong Mei 3; Wang Zhi 1; Qian Guoyu 1; Liu Junhao 1; Gong Xuzhong 1
	2019
Source Publication	chinesejournalofchemicalengineering
ISSN	1004-9541
Volume	27 Issue:11 Pages:2771
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 CaCO 3 to CS effectively inhibits the sintering of CS-CaO and improves VF200. Consequently, the hydration activity of CS-CaO increased from 22.79?°C·min ?1 to 27.19?°C·min ?1 and to 29.27?°C·min ?1 , with addition of 5% graphite or 5% CaCO 3 into carbide slag, respectively.
Language	英语
Document Type	期刊论文
Identifier	http://ir.ipe.ac.cn/handle/122111/40187
Collection	中国科学院过程工程研究所
Affiliation	1.中国科学院过程工程研究所 2.南京林业大学 3.新疆大学
First Author Affilication	中国科学院过程工程研究所
Recommended Citation GB/T 7714	Zhang Junqiang,Zhang Shu,Zhong Mei,et al. relationshipbetweenporestructureandhydrationactivityofcaofromcarbideslag[J]. chinesejournalofchemicalengineering,2019,27(11):2771.
APA	Zhang Junqiang.,Zhang Shu.,Zhong Mei.,Wang Zhi.,Qian Guoyu.,...&Gong Xuzhong.(2019).relationshipbetweenporestructureandhydrationactivityofcaofromcarbideslag.chinesejournalofchemicalengineering,27(11),2771.
MLA	Zhang Junqiang,et al."relationshipbetweenporestructureandhydrationactivityofcaofromcarbideslag".chinesejournalofchemicalengineering 27.11(2019):2771.

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