Determination of the calcium species in coal chars by Ca K-edge XANES analysis

LIU Li-Juan; LIU Hui-Jun; CUI Ming-Qi; HU Yong-Feng; ZHENG Lei; ZHAO Yi-Dong; MA Chen-Yan; XI Shi-Bo; YANG Dong-Liang; GUO Zhi-Ying; WANG Jie

doi:10.1088/1674-1137/37/2/028003

Chinese Physics C> 2013, Vol. 37> Issue(2) : 028003 DOI: 10.1088/1674-1137/37/2/028003

Determination of the calcium species in coal chars by Ca K-edge XANES analysis

Abstract
HTML
Reference
Related

PDF

Abstract：
Ca-based additives have been widely used as a sulfur adsorbent during coal pyrolysis and gasification. The Ca speciation and evolution during the pyrolysis of coal with Ca additives have attracted great attention. In this paper, Ca species in the coal chars prepared from the pyrolysis of Ca(OH)₂ or CaCO₃-added coals are studied by using Ca K-edge X-ray absorption near-edge structural spectroscopy. The results demonstrate that Ca(OH)₂, CaSO₄, CaS and CaO coexist in the Ca(OH)₂-added chars, while Ca(OH)₂ and CaSO₄ are the main species in the Ca(OH)₂-added chars. Besides, a carboxyl-bound Ca is also formed during both the pyrolysis for the Ca(OH)₂-added and the CaCO₃-added coals. A detailed discussion about the Ca speciation is given.

References

[1]

Maes I I, Gryglewicz G, Yperman J et al. Fuel, 1997, 76: 143-147[2] GUAN R G, LI W, LI B Q. Fuel, 2003, 82: 1961-1966[3] WANG J, YAO Y H, CAO J Q et al. Fuel, 2010, 89: 310-317[4] Lin S, Harada M, Suzuki Y et al. Energy Fuels, 2003, 17: 602-607[5] Huggins F E, Huffman G P, Shah N et al. Fuel, 1988, 67: 938-941[6] Yamashita H, Nomura M, Tomita A. Energy Fuels, 1992, 6: 656-661[7] Cazorla-Amoros D, Linares-Solano A, Salinas-Martinez de Lecea C et al. Energy Fuels, 1993, 7: 625-631[8] Huffman G P, Huggins F E, Levasseur A A et al. Fuel, 1989, 68: 238-242[9] Huggins F E, Seidu L B A, Shah N et al. International Journal of Coal Geology, 2009, 78: 65-76[10] Huggins F E, Shah N, Huffman G P et al. Fuel, 1988, 67: 1662-1667[11] Huffman G P, Huggins F E, Jenkins R G et al. Fuel, 1986, 65: 1339-1344[12] Ravel B, Newville M. Journal of Synchrotron Radiation, 2005, 12: 537-541

[1]	Nan-Ru Ma , Hui-Ming Jia , Cheng-Jian Lin , Lei Yang , Xin-Xing Xu , Li-Jie Sun , Feng Yang , Zhen-Dong Wu , Huan-Qiao Zhang , Zu-Hua Liu , Dong-Xi Wang . Self-consistent analysis of sub-barrier fusion enhancement effect in Ca+Ca and Ni+Ni. Chinese Physics C, 2016, 40(11): 114001. doi: 10.1088/1674-1137/40/11/114001
[2]	ZHANG Dong-Hong , XIE Wen-Jie , SU Jun , ZHANG Feng-Shou . Production cross section of neutron-rich calcium isotopes in heavy ion collisions. Chinese Physics C, 2015, 39(4): 044103. doi: 10.1088/1674-1137/39/4/044103
[3]	M. Ablikim et al. (BESIII collaboration) . Determination of the number of ψ' events at BESⅢ. Chinese Physics C, 2013, 37(6): 063001. doi: 10.1088/1674-1137/37/6/063001
[4]	JIA Quan-Jie , CHEN Yu , LI Gang , JIANG Xiao-Ming . Optimization of the in-line X-ray phase-contrast imaging setup considering edge-contrast enhancement and spatial resolution. Chinese Physics C, 2012, 36(3): 267-274. doi: 10.1088/1674-1137/36/3/014
[5]	ZHENG Lei , ZHAO Yi-Dong , TANG Kun , MA Chen-Yan , HAN Yong , CUI Ming-Qi . Total electron yield mode for XANES measurements in the energy region of 2.1--6.0 keV. Chinese Physics C, 2011, 35(2): 199-202. doi: 10.1088/1674-1137/35/2/018
[6]	ZHAO Ting , GAO Bin , LIU Lei , YE Qing , CHU Wang-Sheng , WU Zi-Yu . Theoretical XANES spectra for C₇₆ isomers. Chinese Physics C, 2009, 33(11): 954-959. doi: 10.1088/1674-1137/33/11/005
[7]	BAO Liang-Man , LIN Jun , LIU Wei , LU Wen-Zhong , ZHANG Gui-Lin , LI Yan , MA Chen-Yan , ZHAO Yi-Dong , HE Wei , HU Tian-Dou . Investigation of sulfur speciation in particles from small coal-burning boiler by XANES spectroscopy. Chinese Physics C, 2009, 33(11): 1001-1005. doi: 10.1088/1674-1137/33/11/014
[8]	BAO Liang-Man , ZHANG Gui-Lin , ZHANG Yuan-Xun , LI Yan , LIN Jun , LIU Wei , CAO Qing-Chen , ZHAO Yi-Dong , MA Chen-Yan , HAN Yong . Transfer characterization of sulfur from coal-burning emission to plant leaves by PIXE and XANES. Chinese Physics C, 2009, 33(11): 1010-1015. doi: 10.1088/1674-1137/33/11/016
[9]	LIN Jun , BAO Liang-Man , LIU Wei , LI Yan , LI Yu-Lan , MA Chen-Yan , ZHAO Yi-Dong . Size distribution of sulfur species in fine and ultrafine aerosol particles using sulfur K-edge XANES. Chinese Physics C, 2009, 33(11): 965-968. doi: 10.1088/1674-1137/33/11/007
[10]	MA Xiang . Determination of event start time at BESⅢ. Chinese Physics C, 2008, 32(9): 744-749. doi: 10.1088/1674-1137/32/9/012
[11]	GUO Xiao-Yun , CHU Wang-Sheng , GONG Wei-Min , DONG Yu-Hui , XIE Ya-Ning , YANG Fei-Fei , Maurizio Benfatto , WU Zi-Yu . MXAN Analysis of the XANES Energy Region of LiPDF. Chinese Physics C, 2007, 31(2): 199-203.
[12]	HU Rong , WU Zi-Yu , LIU Jing , XIE Ya-Ning , HU Tian-Dou , ZHANG Jing , FENG Wei-Yue , CHAI Zhi-Fang . XANES Investigation of Chromium Valence State in Yeast Biomass. Chinese Physics C, 2004, 28(1): 100-103.
[13]	JI Yun-Liang , HU Rong , WU Zi-Yu , GUO Lin , XU Hui-Bin , ZHANG Jing , XIE Ya-Ning , HU Tian-Dou . XANES Investigation of Synthesized Nano-ZnO Capped by DDAB. Chinese Physics C, 2003, 27(4): 367-370.
[14]	CHU Wang-Sheng , HU Tian-Dou , XIE Ya-Ning , LIU Wen-Han , WU Zi-Yu , . Metal K-edge XAS Study of AlB2-type Transition-metal Diborides. Chinese Physics C, 2003, 27(S1): 10-14.
[15]	Li Yunde , Xu Xiaomei , Liu Lianshou . Direct Hard Photoproduction of J/ψ andγ in High Energy Pb-Pb and Ca-Ca Collisions at LHC. Chinese Physics C, 1999, 23(8): 837-840.
[16]	Shen Qixing , Yu Hong . Determination of the Spin-parity of the Particle X for the Process J/ψ V₁+X, X→V₂+V₃ by Using the Generalized Moment Analysis. Chinese Physics C, 1993, 17(S2): 117-124.
[17]	Chen Xingqu , Xing Zheng . An Analysis of Energy Spectra and Determination of Spins for Superdeformed Bands in the A~190 Region. Chinese Physics C, 1991, 15(S4): 419-426.
[18]	Zheng Bo . A (l+l)-Dimensional Lattice U(l) Gauge Model and the Fermion Species Doubling. Chinese Physics C, 1990, 14(S3): 249-254.
[19]	NING Ping-Zhi . THE ΛN INTERACTION AND THE HYPERNUCLEUS ^40_ΛCa. Chinese Physics C, 1987, 11(5): 708-712.
[20]	KONG Ling-Jiang , KONG Fan-Xin , LIU Xian-Hui . ELASTIC SCATTERING OF K± MESONS BY ^40—48Ca AND THE ANALYSIS OF NEUTRON DISTRIBUTIONS. Chinese Physics C, 1985, 9(1): 46-54.

Access

Get Citation

LIU Li-Juan, LIU Hui-Jun, CUI Ming-Qi, HU Yong-Feng, ZHENG Lei, ZHAO Yi-Dong, MA Chen-Yan, XI Shi-Bo, YANG Dong-Liang, GUO Zhi-Ying and WANG Jie. Determination of the calcium species in coal chars by Ca K-edge XANES analysis[J]. Chinese Physics C, 2013, 37(2): 028003. doi: 10.1088/1674-1137/37/2/028003

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2012-03-22
Revised: 2012-05-21

Article Metric

Article Views(1780)
PDF Downloads(298)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Determination of the calcium species in coal chars by Ca K-edge XANES analysis

Corresponding author: WANG Jie,

Received Date: 2012-03-22

Accepted Date: 2012-05-21

Available Online: 2013-02-05

Abstract: Ca-based additives have been widely used as a sulfur adsorbent during coal pyrolysis and gasification. The Ca speciation and evolution during the pyrolysis of coal with Ca additives have attracted great attention. In this paper, Ca species in the coal chars prepared from the pyrolysis of Ca(OH)₂ or CaCO₃-added coals are studied by using Ca K-edge X-ray absorption near-edge structural spectroscopy. The results demonstrate that Ca(OH)₂, CaSO₄, CaS and CaO coexist in the Ca(OH)₂-added chars, while Ca(OH)₂ and CaSO₄ are the main species in the Ca(OH)₂-added chars. Besides, a carboxyl-bound Ca is also formed during both the pyrolysis for the Ca(OH)₂-added and the CaCO₃-added coals. A detailed discussion about the Ca speciation is given.

HTML

Reference (1)

Determination of the calcium species in coal chars by Ca K-edge XANES analysis

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article