Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
Migration and speciation transformation of K and Cl caused by interaction of KCl with organics during devolatilization of KCl-loaded model biomass compounds | |
Huang, Yanqin1,2,3; Liu, Huacai1,2; Yuan, Hongyou1,2; Lv, Xianchao1,2,4; Xu, Bin1,2; Li, Weizhen1,2; Uttaruean, Jenjira5; Yin, Xiuli1,2; Wu, Chuangzhi1,2,4 | |
2020-10-01 | |
发表期刊 | FUEL |
ISSN | 0016-2361 |
卷号 | 277页码:10 |
通讯作者 | Yin, Xiuli(xlyin@ms.giec.ac.cn) |
摘要 | To better understand migration of K and Cl caused by interaction of KCl with organics, KCl-loaded model compounds (cellulose, xylan, lignin and pectin) were pyrolyzed within 300-800 degrees C using a fixed-bed apparatus. The amounts of different chemical occurrences of K and Cl in chars were quantitatively determined by sequential chemical fraction analysis combined with ICP-OES and IC. Morphologies and occurrence modes of Cl and K were further examined via XPS and SEM-EDS. Big differences in K and Cl migration were observed among four samples, and the distinction was closely related to types of organic functional groups. At temperature of below 500 V, a low proportion of K was released from four samples, while amounts of water-soluble K was transformed into organically-bounded form via different ion-exchange reaction mechanisms, thereby promoting Cl release. About 46.93-53.31% and 32.47-41.75% of organic-K, presumably formed by reaction of KCl and methoxyls, were detected in lignin and pectin chars, apparently higher than that in xylan and cellulose chars. At the same time, amounts (71.98-81.83%) of Cl was released from doped pectin, followed sequentially by lignin (35.12-52.34%), cellulose (18.56-35.68%), and xylan (10.67-18.65%). Part of released Cl was recaptured by active carbon sites, thereby forming organochlorine, and C-Cl generation followed a sequence of lignin > xylan > cellulose > pectin. As pyrolysis proceeded, cellulose exhibited highest K release due to decomposition of organic-K, while a considerable of char-K with high thermal stability still retained in other samples. Mechanism on migration of K and Cl caused by reaction of KCl with organics was proposed. |
关键词 | KCl Model biomass compounds Migration K and Cl Mechanism |
DOI | 10.1016/j.fuel.2020.118205 |
关键词[WOS] | THERMAL-CONVERSION ; RELEASE ; CHLORINE ; PYROLYSIS ; GASIFICATION ; POTASSIUM ; ALKALI ; SULFUR ; COAL ; TORREFACTION |
收录类别 | SCI |
语种 | 英语 |
资助项目 | National Key Research and Development Program of China[2018YFC1901204] ; National Natural Science Foundation of China[51776207] ; Dalian National Laboratory for Clean Energy (DNL) Cooperation Fund, the CAS[DNL 180306] ; Natural Science Foundation of Guangdong Province, China[2019A1515011535] ; Science and Technology Program of Guangzhou, China[201804010153] |
WOS研究方向 | Energy & Fuels ; Engineering |
项目资助者 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Dalian National Laboratory for Clean Energy (DNL) Cooperation Fund, the CAS ; Natural Science Foundation of Guangdong Province, China ; Science and Technology Program of Guangzhou, China |
WOS类目 | Energy & Fuels ; Engineering, Chemical |
WOS记录号 | WOS:000541255200085 |
出版者 | ELSEVIER SCI LTD |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.giec.ac.cn/handle/344007/27359 |
专题 | 中国科学院广州能源研究所 |
通讯作者 | Yin, Xiuli |
作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 4.Univ Chinese Acad Sci, Beijing 10049, Peoples R China 5.Maejo Univ, Sch Renewable Energy, Chiang Mai 50290, Thailand |
第一作者单位 | 中国科学院广州能源研究所 |
推荐引用方式 GB/T 7714 | Huang, Yanqin,Liu, Huacai,Yuan, Hongyou,et al. Migration and speciation transformation of K and Cl caused by interaction of KCl with organics during devolatilization of KCl-loaded model biomass compounds[J]. FUEL,2020,277:10. |
APA | Huang, Yanqin.,Liu, Huacai.,Yuan, Hongyou.,Lv, Xianchao.,Xu, Bin.,...&Wu, Chuangzhi.(2020).Migration and speciation transformation of K and Cl caused by interaction of KCl with organics during devolatilization of KCl-loaded model biomass compounds.FUEL,277,10. |
MLA | Huang, Yanqin,et al."Migration and speciation transformation of K and Cl caused by interaction of KCl with organics during devolatilization of KCl-loaded model biomass compounds".FUEL 277(2020):10. |
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