 Characterisation of the morphological changes and interactions in char, slag and ash during CO2 gasification of rice straw and ligniteLu Ding, Yan Gong, Yifei Wang, Fuchen Wang and Guangsuo Yu Applied Energy, 2017, vol. 195, issue C, 713-724 Abstract: In this work, a heating stage microscope and a thermogravimetric analyzer were adopted to explore behaviors of char-slag/ash transition during CO2 gasification of rice straw (RS) and Neimeng lignite (NM). Effects of demineralized treatment and various gasification temperatures on the char-slag/ash evolution process were studied. Both RS and NM particles exhibited shrinkage particle form at a moderate reaction temperature (1000°C). The variation of the existential state of K with char-slag/ash transition could well explain the reactivity differences between RS raw char and demineralized char. Compared to RS raw char, NM raw char showed a more significant flow of molten slag at 1350°C, which accounted for the high inhibitory effects at the late stage of NM raw char gasification. There is a threshold conversion (x=0.9) during the evolution processes of NM char samples to NM slag/ash at 1200°C and 1350°C, while this threshold value is only existing at 1000°C for RS char gasification. Keywords: In-situ heating stage; Lignite; Rice straw; Gasification; Char-slag/ash evolution (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:195:y:2017:i:c:p:713-724 Ordering information: This journal article can be ordered from DOI: 10.1016/j.apenergy.2017.03.098 Access Statistics for this article Applied Energy is currently edited by J. Yan More articles in Applied Energy from Elsevier |
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