|
|
|
|
|
|
| Study of Mineral Structure Transformation of Coal Ash with High Ash Melting Temperature by XPS |
| WU Cheng-li, WANG Bei-bei, TAO Ran, FANG Liu-wei, LI Han-xu |
| School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China |
|
|
|
|
Abstract The ash melting temperature of X coal with high ash melting temperature was reduced by adding calcium-magnesium compound flux (WCaO/WMgO=1). In the process of simulated coal gasification, the ash and slag were prepared, and the existence form and evolution process of oxygen, silicon, aluminum, calcium, magnesium at different temperature were analyzed by X-ray photoelectron spectroscopy (XPS). Calcium-magnesium compound flux can reduce ash melting temperature and mainly affect structure change of silicon, aluminum and oxygen. The change of the coordination mode of aluminum and oxygen was shown, namely aluminum-oxide tetrahedrons [AlO4] and aluminum-oxide tetrahedrons [AlO6] varied with temperature changes. The addition of Ca2+ and Mg2+ can destroy the silica chain, making bridging oxygen silicon change into non bridge oxygen silicon; Bridged oxygen bond fracture was broken and non bridging oxygen bond was formed in oxygen element structure. Combined with the Factsage thermodynamic analysis software, the high temperature phase equilibrium composition of coal ash was analyzed after adding calcium-magnesium compound flux, and the fluxing mechanism of flux was studied from the change of mineral structure. The results showed that Ca2+ and Mg2+ were easy to combine with the non bridging oxygen bonds in the silicon-oxide and aluminum-oxide tetrahedrons and aluminum-oxide octahedrons to produce low melting temperature feldspar minerals and magnesia minerals. Therefore the ash melting temperatures were reduced.
|
|
Received: 2017-08-22
Accepted: 2017-12-28
|
|
|
|
[1] LU Xiao-quan(陆小泉). Coal Engineering(煤炭工程), 2016, 48(3): 8.
[2] Chang S, Zhuo J, Meng S, et al. Engineering, 2016, 2(4): 447.
[3] Anne-Gaelle Collot. International Journal of Coal Geology, 2006, 65(3-4): 191.
[4] XU Rong-sheng, WANG Yong-gang, LIN Xiong-chao, et al(徐荣声, 王永刚, 林雄超, 等). Journal of Fuel Chemistry and Technology(燃料化学学报), 2015, (11): 1303.
[5] LI Ji-bing, SHEN Ben-xian, ZHAO Ji-gang, et al(李继炳, 沈本贤, 赵基钢, 等). Journal of China Coal Society(煤炭学报), 2010，(1): 140.
[6] Wu Xiaojiang, Zhang Zhongxiao, Chen Yushuang, et al. Fuel Processing Technology, 2010, 91(11): 1591.
[7] LI Rui-lian, DU Mei-fang, WU Xiao-jiang, et al(李瑞连, 杜梅芳, 乌晓江, 等). Journal of Fuel Chemistry and Technology(燃料化学学报), 2016, 44(5).
[8] Li J, Du M F, Zhang Z X, et al. Energy & Fuels, 2009, 23(2): 704.
[9] LI Mei, YANG Jun-he, ZHANG Qi-feng, et al(李 梅, 杨俊和, 张启锋, 等). Journal of Fuel Chemistry and Technology(燃料化学学报), 2013, 41(11): 1287.
[10] MA Ling-ling, QIN Zhi-hong, ZHANG Lu, et al(马玲玲, 秦志宏, 张 露, 等). Journal of Fuel Chemistry and Technology(燃料化学学报), 2014, 42(3): 277.
[11] ZHANG Lan-jun, LI Zeng-hua, YANG Yong-liang, et al(张兰君, 李增华, 杨永良, 等). Safety in Coal Mines(煤矿安全), 2016, 47(5): 85. |
| [1] |
WANG Zhe1, 2, LIU Jun-liang1*, SUN Bai-ling1, CAO Jin-zhen2. Study on Mechanism of Moisture Absorption Change of Larch Plantation under Vacuum Heat Treatment[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(10): 3160-3164. |
| [2] |
XU Dong-yu, JIN Jie, YAN Yu, HAN Lan-fang, KANG Ming-jie, WANG Zi-ying, ZHAO Ye, SUN Ke* . Characterization of Biochar by X-Ray Photoelectron Spectroscopy and 13C Nuclear Magnetic Resonance[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(12): 3415-3418. |
| [3] |
XIE Hua1, 2, WANG Lie-lin2, LUO De-li3，CHEN Min2. Vibrational Spectrum and XPS Contrastive Studies on Pyrochlore-Type Oxygen-Rich Ce2Zr2O8 and Oxygen-Defective Nd2Zr2O7 Phases[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(06): 1518-1523. |
| [4] |
QU Ping, WANG Xuan, CUI Xiao-xia, ZHANG Li-ping*. Biomimetic Mineralization of Rod-Like Cellulose Nano-Whiskers and Spectrum Analysis [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(05): 1418-1422. |
| [5] |
XU Yan1, SUN Bao-li2, MA Chao1, ZHANG Ping1, CAI Meng-ling1, WU Xue-min1* . XPS and SEM Spectroscopy Study of Hyperdispersant on Atrazine Surface[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(09): 2569-2573. |
| [6] |
Qiherima1, 3，YUAN Hui2，ZHANG Yun-hong1，LI Hui-feng2，XU Guang-tong2* . In Situ FTIR and XPS Study on Selective Hydrodesulfurization Catalyst of FCC Gasoline [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(07): 1752-1757. |
| [7] |
YANG Fa-zhan1, WANG Shi-qing1, 2, SHEN Li-ru1*, CHEN Qing-chuan1 . XPS and Raman Studies of Diamond-Like Carbon Films Prepared by Various Deposition Techniques[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(07): 1800-1803. |
| [8] |
ZHAO Zhi-juan1, LIU Fen1*, WANG Hai2, ZHAO Liang-zhong1, YAN Shou-ke1, 3, SONG Xiao-ping2 . Thickness Measurement of Ultrathin SiO2 Layer on Si by Using XPS Standard Curve [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(06): 1670-1673. |
| [9] |
MEI Yan, YAN Jian-ping, NIE Zuo-ren. XPS Study on the Influence of Calcination Conditions to Cerium Ion Valence [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(01): 270-273. |
| [10] |
WANG Xiao-qing,REN Hai-qing*,ZHAO Rong-jun,CHENG Qiang, CHEN Yong-ping . FTIR and XPS Spectroscopic Studies of Photodegradation of Moso Bamboo (Phyllostachys Pubescens Mazel)[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(07): 1864-1867. |
| [11] |
SUN Jie1,2,AN Cheng-qiang2,YU Xiao-zhong2,TAN Yong2 . XPS Analysis of Chromium Element in Chromate Passivation Film Formed on Tinplate in Different Surface State[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(02): 544-547. |
| [12] |
FANG Jiang-yu1,2,3,WAN Xiao-chun1,2*. XPS Analysis of Tea Plant Leaf and Root Surface[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(09): 2196-2200. |
| [13] |
WANG Can-yao,ZHENG Yu-ying*. Research on Structure of MC-Nylon 6/Aramid Composites by Spectroanalysis Method[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(01): 94-97. |
| [14] |
WANG Yu-xin1, 2, FENG Ke-cheng1, LI Ying-ai2, LI Wei-qing2, LIU Li-hua2, ZHAO Chun-hong2, ZHAO Yong-nian2 . Ultraviolet Transmission Spectra of BCxN Thin Films [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(01): 102-105. |
| [15] |
YE Yin, SHAO Ming-wang*, WU Zheng-cui, NI You-bao . Synthesis of Ag2S Nanoparticles at Room Temperature and Their Characterization with XPS [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(04): 553-555. |
|
|
|
|
