The catalytic effect of the Na and Ca-rich industrial wastes on the thermal ignition of coal combustion

doi:10.1016/j.cjche.2019.02.037

中国化学工程学报 ›› 2019, Vol. 27 ›› Issue (10): 2467-2471.DOI: 10.1016/j.cjche.2019.02.037

The catalytic effect of the Na and Ca-rich industrial wastes on the thermal ignition of coal combustion

Jun Cheng, Fan Zhou, Xiaoxu Xuan, Jianzhong Liu, Junhu Zhou, Kefa Cen

State Key Lab of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

收稿日期:2018-05-05 修回日期:2019-02-20 出版日期:2019-10-28 发布日期:2020-01-17
通讯作者: Jun Cheng
基金资助:
Supported by the National Key Research and Development Program of China (2016YFB0600505) and the National Natural Science Foundation of China (51676171).

The catalytic effect of the Na and Ca-rich industrial wastes on the thermal ignition of coal combustion

Jun Cheng, Fan Zhou, Xiaoxu Xuan, Jianzhong Liu, Junhu Zhou, Kefa Cen

State Key Lab of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Received:2018-05-05 Revised:2019-02-20 Online:2019-10-28 Published:2020-01-17
Contact: Jun Cheng
Supported by:
Supported by the National Key Research and Development Program of China (2016YFB0600505) and the National Natural Science Foundation of China (51676171).

摘要/Abstract

摘要： The catalytic effects of four industrial wastes, namely, the soap residue (SR), brine sludge (BS), calcium carbide residue (CCR), and white lime mud (WLM), on coal thermal ignition were investigated. The acidity of palmitate anion associated with Na⁺ in SR was lower than that of chloride anion combined with Na⁺ in BS, which resulted in an improved the combustion of SR. The acidity of OH^- anion combined with Ca²⁺ in CCR was lower than that of CO₃^2- anion combined with Ca²⁺ in WLM, resulting in CCR exhibiting a better catalytic effect on coal ignition. The alkaline metal Na had lower initial ionisation energy than the alkaline earth metal Ca. Therefore, the Na-rich SR exhibited higher catalytic activity on coal ignition than Ca-rich CCR. The ignition temperature of coal with 0.5% SR decreased from 544 to 503℃.

关键词: Industrial waste, Catalysis, Coal combustion, Thermal ignition

Abstract: The catalytic effects of four industrial wastes, namely, the soap residue (SR), brine sludge (BS), calcium carbide residue (CCR), and white lime mud (WLM), on coal thermal ignition were investigated. The acidity of palmitate anion associated with Na⁺ in SR was lower than that of chloride anion combined with Na⁺ in BS, which resulted in an improved the combustion of SR. The acidity of OH^- anion combined with Ca²⁺ in CCR was lower than that of CO₃^2- anion combined with Ca²⁺ in WLM, resulting in CCR exhibiting a better catalytic effect on coal ignition. The alkaline metal Na had lower initial ionisation energy than the alkaline earth metal Ca. Therefore, the Na-rich SR exhibited higher catalytic activity on coal ignition than Ca-rich CCR. The ignition temperature of coal with 0.5% SR decreased from 544 to 503℃.

Key words: Industrial waste, Catalysis, Coal combustion, Thermal ignition

Jun Cheng, Fan Zhou, Xiaoxu Xuan, Jianzhong Liu, Junhu Zhou, Kefa Cen. The catalytic effect of the Na and Ca-rich industrial wastes on the thermal ignition of coal combustion[J]. 中国化学工程学报, 2019, 27(10): 2467-2471.

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The catalytic effect of the Na and Ca-rich industrial wastes on the thermal ignition of coal combustion

The catalytic effect of the Na and Ca-rich industrial wastes on the thermal ignition of coal combustion

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