Promotion and inhibition effect of K in rice husk during chemical looping gasification
K is the trace metal with the most content in biomass, which provides a dual effect of promotion on chemical looping gasification (CLG) and inhibition on oxygen carrier (OC) performance. However, the mechanism and boundary between promotion and inhibition of K remains unclear in biomass CLG. In this...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/170669 |
| _version_ | 1811693070225244160 |
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| author | Xin, Hongchang Wu, Jiawei Zhang, Jiaxin Chen, Sifan Pang, Huaqiang Lv, Juan Jiang, Enchen Hu, Zhifeng |
| author2 | Nanyang Environment and Water Research Institute |
| author_facet | Nanyang Environment and Water Research Institute Xin, Hongchang Wu, Jiawei Zhang, Jiaxin Chen, Sifan Pang, Huaqiang Lv, Juan Jiang, Enchen Hu, Zhifeng |
| author_sort | Xin, Hongchang |
| collection | NTU |
| description | K is the trace metal with the most content in biomass, which provides a dual effect of promotion on chemical looping gasification (CLG) and inhibition on oxygen carrier (OC) performance. However, the mechanism and boundary between promotion and inhibition of K remains unclear in biomass CLG. In this study, the dual effect of K on CLG performance is investigated under different K content, steam, K existence form and thermo-kinetics analysis. The results show that K can significantly promote CLG performance under low K-addition and accelerate agglomeration under 12 % K-addition. Compared with the pickling rice husk, the gas yield, carbon conversion efficiency and gasification efficiency of 2 % CH3COOK-AH is the highest and increases by 56.6 %, 67.7 % and 58.5 % in CLG. Moreover, the addition of steam can sufficiently utilize the promotion effect of CH3COOK and inhibit the formation of Fe2SiO4 and agglomeration. Furthermore, 6 % CH3COOK-AH has the highest gas yield of 0.79 Nm3/kg, carbon conversion efficiency of 41.6 % and gasification efficiency of 78.1 % during steam CLG, which are respectively 102.6 %, 25.3 % and 127.0 % higher than those of 2 % CH3COOK-AH in CLG. In addition, KCl-AH has more Fe2SiO4, serious agglomeration and lower CLG performance than CH3COOK-AH under high K-addition. According to the CLG performance and thermogravimetric analysis, the promotion of CH3COOK is stronger than that of KCl. |
| first_indexed | 2024-10-01T06:45:50Z |
| format | Journal Article |
| id | ntu-10356/170669 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:45:50Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1706692023-09-25T08:09:40Z Promotion and inhibition effect of K in rice husk during chemical looping gasification Xin, Hongchang Wu, Jiawei Zhang, Jiaxin Chen, Sifan Pang, Huaqiang Lv, Juan Jiang, Enchen Hu, Zhifeng Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre Engineering::Chemical engineering Biomass Chemical Looping Gasification K is the trace metal with the most content in biomass, which provides a dual effect of promotion on chemical looping gasification (CLG) and inhibition on oxygen carrier (OC) performance. However, the mechanism and boundary between promotion and inhibition of K remains unclear in biomass CLG. In this study, the dual effect of K on CLG performance is investigated under different K content, steam, K existence form and thermo-kinetics analysis. The results show that K can significantly promote CLG performance under low K-addition and accelerate agglomeration under 12 % K-addition. Compared with the pickling rice husk, the gas yield, carbon conversion efficiency and gasification efficiency of 2 % CH3COOK-AH is the highest and increases by 56.6 %, 67.7 % and 58.5 % in CLG. Moreover, the addition of steam can sufficiently utilize the promotion effect of CH3COOK and inhibit the formation of Fe2SiO4 and agglomeration. Furthermore, 6 % CH3COOK-AH has the highest gas yield of 0.79 Nm3/kg, carbon conversion efficiency of 41.6 % and gasification efficiency of 78.1 % during steam CLG, which are respectively 102.6 %, 25.3 % and 127.0 % higher than those of 2 % CH3COOK-AH in CLG. In addition, KCl-AH has more Fe2SiO4, serious agglomeration and lower CLG performance than CH3COOK-AH under high K-addition. According to the CLG performance and thermogravimetric analysis, the promotion of CH3COOK is stronger than that of KCl. The authors are grateful to National Natural Science Foundation of China (51806068), Natural Science Foundation of Guangdong Province (2022A1515010738); Department of Education of Guangdong Province (2021KTSCX011) and the State Scholarship Fund (202008440162) for the financial support. 2023-09-25T08:09:40Z 2023-09-25T08:09:40Z 2023 Journal Article Xin, H., Wu, J., Zhang, J., Chen, S., Pang, H., Lv, J., Jiang, E. & Hu, Z. (2023). Promotion and inhibition effect of K in rice husk during chemical looping gasification. Fuel, 342, 127825-. https://dx.doi.org/10.1016/j.fuel.2023.127825 0016-2361 https://hdl.handle.net/10356/170669 10.1016/j.fuel.2023.127825 2-s2.0-85150444288 342 127825 en Fuel © 2023 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Chemical engineering Biomass Chemical Looping Gasification Xin, Hongchang Wu, Jiawei Zhang, Jiaxin Chen, Sifan Pang, Huaqiang Lv, Juan Jiang, Enchen Hu, Zhifeng Promotion and inhibition effect of K in rice husk during chemical looping gasification |
| title | Promotion and inhibition effect of K in rice husk during chemical looping gasification |
| title_full | Promotion and inhibition effect of K in rice husk during chemical looping gasification |
| title_fullStr | Promotion and inhibition effect of K in rice husk during chemical looping gasification |
| title_full_unstemmed | Promotion and inhibition effect of K in rice husk during chemical looping gasification |
| title_short | Promotion and inhibition effect of K in rice husk during chemical looping gasification |
| title_sort | promotion and inhibition effect of k in rice husk during chemical looping gasification |
| topic | Engineering::Chemical engineering Biomass Chemical Looping Gasification |
| url | https://hdl.handle.net/10356/170669 |
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