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![]() ![]() ![]() ![]() ![]() | |
2020-10-01 | |
Source Publication | FUEL
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ISSN | 0016-2361 |
Volume | 277Pages:10 |
Corresponding Author | Yin, Xiuli(xlyin@ms.giec.ac.cn) |
Abstract | 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. |
Keyword | KCl Model biomass compounds Migration K and Cl Mechanism |
DOI | 10.1016/j.fuel.2020.118205 |
WOS Keyword | THERMAL-CONVERSION ; RELEASE ; CHLORINE ; PYROLYSIS ; GASIFICATION ; POTASSIUM ; ALKALI ; SULFUR ; COAL ; TORREFACTION |
Indexed By | SCI |
Language | 英语 |
Funding Project | 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 Research Area | Energy & Fuels ; Engineering |
Funding Organization | 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 Subject | Energy & Fuels ; Engineering, Chemical |
WOS ID | WOS:000541255200085 |
Publisher | ELSEVIER SCI LTD |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.giec.ac.cn/handle/344007/27359 |
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, 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 |
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. 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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