Insights into the co-combustion attributes and mutual effects of high-alkali lignite and flotation carbon-rich fractions from coal gasification fine slag
The reutilization of waste coal gasification fine slag (GFS) as an energy source through co-combustion technology has been demonstrated to be a more economically and environmentally viable solution. The reutilization of waste GFS via co-combustion with high-alkali lignite (LC) offers economic and en...
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
|
| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025013805 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849716323863494656 |
|---|---|
| author | Yang Guo Demian Wang Xinjie Liu Jianjun Wu Fanhui Guo Yixin Zhang Shiling Yuan Chunan Du Meng Lin Junliang Liu |
| author_facet | Yang Guo Demian Wang Xinjie Liu Jianjun Wu Fanhui Guo Yixin Zhang Shiling Yuan Chunan Du Meng Lin Junliang Liu |
| author_sort | Yang Guo |
| collection | DOAJ |
| description | The reutilization of waste coal gasification fine slag (GFS) as an energy source through co-combustion technology has been demonstrated to be a more economically and environmentally viable solution. The reutilization of waste GFS via co-combustion with high-alkali lignite (LC) offers economic and environmental benefits. This study investigates enhancing the thermal reactivity of flotation carbon-rich fractions (FC) from GFS through co-combustion with LC while mitigating LC-induced slagging. Combustion performance, interactions, kinetics, and slagging tendencies were analyzed using thermogravimetric analysis, kinetic modeling, and principal component analysis (PCA). Results demonstrated that co-combustion significantly improved reaction efficiency and performance. Synergistic interactions dominated the co-combustion process at 40–60 % FC blending ratios, though antagonistic effects occurred during the initial ignition and final burnout stages. The interaction mechanism stemmed from the porous microstructure of FC, enhanced heat transfer, and catalytic effects from alkali metals (Na/K) of LC. PCA highlighted a stronger systemic influence of LC due to its high reactivity and alkali metals content, which reduced the reaction activation energy and accelerated combustion kinetics. In addition, the base-to-acid ratio regression model confirms a negative correlation between FC proportion and slagging risk. Furthermore, the optimal blending ratio of FC to LC is 4:6, balancing combustion efficiency, slagging resistance, and economic benefits. This work provides insights into the rational utilization of waste GFS and low-rank coal through co-combustion, offering a sustainable approach for industrial waste-to-energy conversion. |
| format | Article |
| id | doaj-art-0db3c7b22c7649df987117a6bd2c4cbe |
| institution | DOAJ |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-0db3c7b22c7649df987117a6bd2c4cbe2025-08-20T03:13:03ZengElsevierResults in Engineering2590-12302025-06-012610531010.1016/j.rineng.2025.105310Insights into the co-combustion attributes and mutual effects of high-alkali lignite and flotation carbon-rich fractions from coal gasification fine slagYang Guo0Demian Wang1Xinjie Liu2Jianjun Wu3Fanhui Guo4Yixin Zhang5Shiling Yuan6Chunan Du7Meng Lin8Junliang Liu9Shandong Key Laboratory of Green Electricity&Hydrogen Science and Technology, School of Chemical Engineering, Shandong Institute of Petroleum and Chemical Technology, Dongying 257061, PR China; Corresponding authors.Shandong Key Laboratory of Green Electricity&Hydrogen Science and Technology, School of Chemical Engineering, Shandong Institute of Petroleum and Chemical Technology, Dongying 257061, PR ChinaShandong Key Laboratory of Green Electricity&Hydrogen Science and Technology, School of Chemical Engineering, Shandong Institute of Petroleum and Chemical Technology, Dongying 257061, PR ChinaSchool of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, PR ChinaSchool of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, PR ChinaSchool of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, PR China; Corresponding authors.Key Lab of Colloid and Interface Chemistry, Shandong University, Jinan 250100, PR ChinaShandong Key Laboratory of Green Electricity&Hydrogen Science and Technology, School of Chemical Engineering, Shandong Institute of Petroleum and Chemical Technology, Dongying 257061, PR ChinaKey Lab of Colloid and Interface Chemistry, Shandong University, Jinan 250100, PR ChinaShandong Key Laboratory of Green Electricity&Hydrogen Science and Technology, School of Chemical Engineering, Shandong Institute of Petroleum and Chemical Technology, Dongying 257061, PR ChinaThe reutilization of waste coal gasification fine slag (GFS) as an energy source through co-combustion technology has been demonstrated to be a more economically and environmentally viable solution. The reutilization of waste GFS via co-combustion with high-alkali lignite (LC) offers economic and environmental benefits. This study investigates enhancing the thermal reactivity of flotation carbon-rich fractions (FC) from GFS through co-combustion with LC while mitigating LC-induced slagging. Combustion performance, interactions, kinetics, and slagging tendencies were analyzed using thermogravimetric analysis, kinetic modeling, and principal component analysis (PCA). Results demonstrated that co-combustion significantly improved reaction efficiency and performance. Synergistic interactions dominated the co-combustion process at 40–60 % FC blending ratios, though antagonistic effects occurred during the initial ignition and final burnout stages. The interaction mechanism stemmed from the porous microstructure of FC, enhanced heat transfer, and catalytic effects from alkali metals (Na/K) of LC. PCA highlighted a stronger systemic influence of LC due to its high reactivity and alkali metals content, which reduced the reaction activation energy and accelerated combustion kinetics. In addition, the base-to-acid ratio regression model confirms a negative correlation between FC proportion and slagging risk. Furthermore, the optimal blending ratio of FC to LC is 4:6, balancing combustion efficiency, slagging resistance, and economic benefits. This work provides insights into the rational utilization of waste GFS and low-rank coal through co-combustion, offering a sustainable approach for industrial waste-to-energy conversion.http://www.sciencedirect.com/science/article/pii/S2590123025013805Coal gasification fine slagFlotation carbon-rich fractionsHigh-alkali ligniteCo-combustionMutual effects |
| spellingShingle | Yang Guo Demian Wang Xinjie Liu Jianjun Wu Fanhui Guo Yixin Zhang Shiling Yuan Chunan Du Meng Lin Junliang Liu Insights into the co-combustion attributes and mutual effects of high-alkali lignite and flotation carbon-rich fractions from coal gasification fine slag Results in Engineering Coal gasification fine slag Flotation carbon-rich fractions High-alkali lignite Co-combustion Mutual effects |
| title | Insights into the co-combustion attributes and mutual effects of high-alkali lignite and flotation carbon-rich fractions from coal gasification fine slag |
| title_full | Insights into the co-combustion attributes and mutual effects of high-alkali lignite and flotation carbon-rich fractions from coal gasification fine slag |
| title_fullStr | Insights into the co-combustion attributes and mutual effects of high-alkali lignite and flotation carbon-rich fractions from coal gasification fine slag |
| title_full_unstemmed | Insights into the co-combustion attributes and mutual effects of high-alkali lignite and flotation carbon-rich fractions from coal gasification fine slag |
| title_short | Insights into the co-combustion attributes and mutual effects of high-alkali lignite and flotation carbon-rich fractions from coal gasification fine slag |
| title_sort | insights into the co combustion attributes and mutual effects of high alkali lignite and flotation carbon rich fractions from coal gasification fine slag |
| topic | Coal gasification fine slag Flotation carbon-rich fractions High-alkali lignite Co-combustion Mutual effects |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025013805 |
| work_keys_str_mv | AT yangguo insightsintothecocombustionattributesandmutualeffectsofhighalkaliligniteandflotationcarbonrichfractionsfromcoalgasificationfineslag AT demianwang insightsintothecocombustionattributesandmutualeffectsofhighalkaliligniteandflotationcarbonrichfractionsfromcoalgasificationfineslag AT xinjieliu insightsintothecocombustionattributesandmutualeffectsofhighalkaliligniteandflotationcarbonrichfractionsfromcoalgasificationfineslag AT jianjunwu insightsintothecocombustionattributesandmutualeffectsofhighalkaliligniteandflotationcarbonrichfractionsfromcoalgasificationfineslag AT fanhuiguo insightsintothecocombustionattributesandmutualeffectsofhighalkaliligniteandflotationcarbonrichfractionsfromcoalgasificationfineslag AT yixinzhang insightsintothecocombustionattributesandmutualeffectsofhighalkaliligniteandflotationcarbonrichfractionsfromcoalgasificationfineslag AT shilingyuan insightsintothecocombustionattributesandmutualeffectsofhighalkaliligniteandflotationcarbonrichfractionsfromcoalgasificationfineslag AT chunandu insightsintothecocombustionattributesandmutualeffectsofhighalkaliligniteandflotationcarbonrichfractionsfromcoalgasificationfineslag AT menglin insightsintothecocombustionattributesandmutualeffectsofhighalkaliligniteandflotationcarbonrichfractionsfromcoalgasificationfineslag AT junliangliu insightsintothecocombustionattributesandmutualeffectsofhighalkaliligniteandflotationcarbonrichfractionsfromcoalgasificationfineslag |