Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Release and Transformation Pathways of Various K Species during Thermal Conversion of Agricultural Straw. Part 1: Devolatilization Stage | |
Huang, Yanqin1,2 ; Liu, Huacai1,2; Yuan, Hongyou1,2; Zhuang, Xiuzheng1,2,3; Yuan, Song1,2,3; Yin, Xiuli1,2; Wu, Chuangzhi1,2
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| 2018-09-01 | |
| Source Publication | ENERGY & FUELS
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| ISSN | 0887-0624 |
| Volume | 32Issue:9Pages:9605-9613 |
| Corresponding Author | Yin, Xiuli(xlyin@ms.giec.ac.cn) |
| Abstract | The serious K-induced ash problems during biomass thermal conversion are closely related to release and transformation behaviors of K. The aim of this work is to explore the contribution of different occurrence forms of K on K release and transformation pathways among various K species during devolatilization of agricultural straw. Devolatilization experiments under different heat treatment conditions (i.e., temperature, heating rate, and atmosphere) were carried out using a fixed-bed apparatus, and occurrence forms of K in the virgin sample and residual chars were quantitatively determined by sequential chemical fraction analysis combined with inductively coupled plasma optical emission spectrometry. Unstable watersoluble K and ion-exchangeable K in wheat straw accounted for about 89.3% of total K and were mainly responsible for the K release. Part of unstable K was directly decomposed into atomic K or sublimated, and a large fraction was first bound to the char matrix to form char K and then transformed into other forms or released depending upon specific conditions. The release and transformation of K were promoted under intensive conditions (i.e., high temperature and heating rate) and were strongly dependent upon atmospheres. In comparison to N-2 conditions, a CO2 atmosphere inhibited K release and facilitated the formation of HCl-soluble K, while an O-2 atmosphere promoted K release and enhanced the formation of insoluble K. Finally, the functional mechanism for K release and transformation among various K species during volatilization was proposed. |
| DOI | 10.1021/acs.energyfuels.8b02191 |
| WOS Keyword | BED GASIFICATION CONDITIONS ; ALKALINE-EARTH METALS ; GAS-PHASE ; INORGANIC ELEMENTS ; WOOD COMBUSTION ; POTASSIUM ; PYROLYSIS ; BIOMASS ; CHLORINE ; COAL |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51661145022] ; National Natural Science Foundation of China[51776207] ; Natural Science Foundation of Guangdong Province[2017B030308002] |
| WOS Research Area | Energy & Fuels ; Engineering |
| Funding Organization | National Natural Science Foundation of China ; Natural Science Foundation of Guangdong Province |
| WOS Subject | Energy & Fuels ; Engineering, Chemical |
| WOS ID | WOS:000445711700066 |
| Publisher | AMER CHEMICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/24076 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Yin, Xiuli |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, 2 Nengyuan Rd, Guangzhou 510640, Guangdong, Peoples R China 2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 10049, Peoples R China |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Huang, Yanqin,Liu, Huacai,Yuan, Hongyou,et al. Release and Transformation Pathways of Various K Species during Thermal Conversion of Agricultural Straw. Part 1: Devolatilization Stage[J]. ENERGY & FUELS,2018,32(9):9605-9613. |
| APA | Huang, Yanqin.,Liu, Huacai.,Yuan, Hongyou.,Zhuang, Xiuzheng.,Yuan, Song.,...&Wu, Chuangzhi.(2018).Release and Transformation Pathways of Various K Species during Thermal Conversion of Agricultural Straw. Part 1: Devolatilization Stage.ENERGY & FUELS,32(9),9605-9613. |
| MLA | Huang, Yanqin,et al."Release and Transformation Pathways of Various K Species during Thermal Conversion of Agricultural Straw. Part 1: Devolatilization Stage".ENERGY & FUELS 32.9(2018):9605-9613. |
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