Changes and Distribution of Modes of Occurrence of Seventeen Potentially-Hazardous Trace Elements during Entrained Flow Gasification of Coals from Ningdong, China

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dc.contributor.ORCID0000-0002-7295-5952 (Finkelman, R)
dc.contributor.authorTang, Yuegang
dc.contributor.authorGuo, Xin
dc.contributor.authorPan, Xi
dc.contributor.authorFinkelman, Robert B.
dc.contributor.authorWang, Yafeng
dc.contributor.authorHuan, Binbin
dc.contributor.authorWang, Shaoqing
dc.contributor.utdAuthorFinkelman, Robert B.
dc.date.accessioned2019-05-03T19:32:06Z
dc.date.available2019-05-03T19:32:06Z
dc.date.created2018-05-08
dc.description.abstractIn order to reveal the migration of trace elements from coal to gasification residues, the modes of occurrence of potentially- hazardous trace elements (Be, V, Cr, Co, Ni, Cu, Zn, As, Se, Mo, Cd, Sb, Ba, Hg, Tl, Pb, and U) were determined by a five steps sequential chemical extraction procedure. Samples were collected from a coal-to- methanol plant (GE water-slurry coal gasification, formerly Texaco) and a coal-to-olefins plant (Gaskombimat Schwarze Pumpe pulverized coal gasification, GSP) in the Ningdong Energy and Chemical Industry Base, China. Concentrations of As and Se were determined using atomic fluorescence spectrometry (AFS). The content of Hg was determined using a DMA-80 mercury analyzer. Other trace elements (Be, Cr, Co, Ni, Cu, Zn, Mo, Cd, Sb, Ba, Tl, Pb, and U) were analyzed using inductively- coupled plasma mass spectrometry (ICP-MS). XRD and SEM-EDX were employed to determine the minerals or other inorganic phases in samples. The modes of occurrence of trace elements in feed coals can influence their behavior, including their volatility during coal gasification and, ultimately, the element's mode of occurrence in the gasification residues. Knowing an element's mode of occurrence in the feed coal may aid in anticipating which components the elements are likely to combine with during liquid slag cooling. Based on the relative enrichment of trace elements in the residues, elements Be, V, Cu, Mo, Ba, and Hg showed volatility during the GE and GSP gasification processes; As and Se showed volatilization-condensation behavior during the GE and GSP gasification processes; Cr, Ni, Zn, Cd, Sb, Tl, Pb, and U showed volatility during the GE gasification process; Zn, Cd, Sb, Pb, and Tl in the GSP samples, as well as Co in the GE samples, showed volatilization-condensation behavior; and Cr, Co, Ni, and U showed less volatility during the GSP gasification process. In the gasification residues, quartz, calcite, and Al-Si glass were the main inorganic phases, carbonates and iron and manganese oxides (likely recrystallized calcite) were the main hosts of most trace elements in the residues, including Be, V, Cr, Co, Ni, Zn, As, Cd, Ba, Hg, Tl, Pb, and U. Copper, Zn, Se, Cd, and Sb tended to stay in the Al-Si glass. Molybdenum is likely precipitated with the sulfides in the residues.
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.description.sponsorshipNational Key Basic Research Program of China (no. 2014CB238905) and 111 project (no. B17042).
dc.identifier.bibliographicCitationTang, Yuegang, Xin Guo, Xi Pan, Robert B. Finkelman, et al. 2018. "Changes and distribution of modes of occurrence of seventeen potentially-hazardous trace elements during entrained flow gasification of coals from Ningdong, China." Minerals 8(5), doi:10.3390/min8050202
dc.identifier.issn2075-163X
dc.identifier.issue5
dc.identifier.urihttps://hdl.handle.net/10735.1/6440
dc.identifier.volume8
dc.language.isoen
dc.publisherMDPI
dc.relation.urihttp://dx.doi.org/10.3390/min8050202
dc.rightsCC BY 4.0 (Attribution)
dc.rights©2018 The Authors.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.source.journalMinerals
dc.subjectOrganosulfur compounds
dc.subjectFly ash
dc.subjectCarbon
dc.subjectPyrites
dc.subjectChina, Southwest
dc.subjectCombustion
dc.subjectGeochemistry
dc.subjectMineralogy
dc.subjectCoal gasification
dc.titleChanges and Distribution of Modes of Occurrence of Seventeen Potentially-Hazardous Trace Elements during Entrained Flow Gasification of Coals from Ningdong, China
dc.type.genrearticle

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