Microstructural transformations of two representative slags at high temperatures and effects on the viscosity

Yong Jiang; Xiongchao Lin; Keiko Ideta; Hiromichi Takebe; Jin Miyawaki; Seong-Ho Yoon; Isao Mochida

Journal of Industrial and Engineering Chemistry, Vol.20, No.4, 1338-1345, July, 2014

DOI10.1016/j.jiec.2013.07.015 Export Citation

Microstructural transformations of two representative slags at high temperatures and effects on the viscosity

Yong Jiang^{1, 2}, Xiongchao Lin³, Keiko Ideta¹, Hiromichi Takebe⁴, Jin Miyawaki¹, Seong-Ho Yoon^{1, 5, †}, and Isao Mochida⁵

¹Institute for Materials Chemistry and Engineering, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
²School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang 471003, China
³School of Chemistry and Environmental Engineering, China University of Mining and Technology (Bejing), Bejing 100083, China
⁴Graduate School of Science and Engineering, Ehime University, Matsuyama, Ehime 790-8577, Japan
⁵Research and Education Center of Carbon Resources, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan

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The transformation of the Si-Al microstructures of slags, which have similar SiO2 + Al2O3 and CaO contents but different SiO2/Al2O3 ratios, was quantified using multinuclear SS-NMR. Three kinds of Si Qn microstructures (Q2, Q3, and Q4), where n denotes the number of bridging oxygen linked to other Si atoms for each Q (SiO4) unit, and one Al structure (Al (IV)) were present in both slags. The Q3 percentage in two slags was increased as increase of temperature from 1200 to 1600 ℃. The transformation of Si-Al microstructures was interpreted by a hypothetic model of cristobalite cluster based on the crystal and Qn structure.

Keywords:Coal slag;Microstructural transformation;Solid-state NMR;Viscosity

[References]

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Wang HG, Qiu PH, Li YQ, Han ZJ, Wu SJ, Zhao GB, Energy Fuels, 26(4), 2204 (2012)
Aineto M, Acosta A, Rincon JM, Romero M, Fuel, 85(16), 2352 (2006)
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Song WJ, Tang LH, Zhu XD, Wu YQ, Zhu ZB, Koyama S, Energy Fuels, 24, 182 (2009)
Huffman GP, Huggins FE, Dunmyre GR, Fuel, 60, 585 (1981)
Wu XJ, Zhou T, Chen YS, Zhang ZX, Piao GL, Kobayashi N, Mori S, Itaya Y, Asia-Pacific J. Chem. Eng., 6, 220 (2011)
Nowok JW, Hurley JP, Stanley DC, Energy Fuels, 7, 1135 (1993)
Shimoda K, Tobu Y, Kanehashi K, Nemoto T, Salto K, J. Non-Cryst. Solids, 354, 1035 (2008)
Lin XC, Ideta K, Miyawaki J, Takebe H, Yoon SH, Mochida I, Energy Fuels, 26(4), 2136 (2012)
Thy P, Lesher CE, Jenkins BM, Fuel, 79(6), 693 (2000)
Van Dyk JC, Benson SA, Laumb ML, Waanders B, Fuel, 88(6), 1057 (2009)
Yuan HP, Liang QF, Gong X, Energy Fuels, 26(6), 3717 (2012)
Senior CL, Srinivasachar S, Energy Fuels, 9, 277 (1986)
Kondratiev A, Jak E, Fuel, 80, 1989 (2001)
Vargas S, Frandsen FJ, Dam-Johansen K, Prog. Energy Combust. Sci., 27(3), 237 (2001)
Nowok JW, Energy Fuels, 8(6), 1324 (1994)
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Mayoral MC, Izquierdo MT, Andres JM, Rubio B, Thermochim. Acta, 373(2), 173 (2001)
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Skvara F, Kopecky L, Smilauer V, Bittnar Z, J. Hazard. Mater., 168(2-3), 711 (2009)
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Janes N, Oldfield E, J. Am. Chem. Soc., 107, 6769 (1985)
He H, Guo J, Zhu J, Yuan P, Hu C, Spectroc. Acta Pt. A-Molec. Biomolec. Spectr., 60, 1061 (2004)
Pardal X, Brunet F, Charpentier T, Pochard I, Nonat A, Inorg. Chem., 51(3), 1827 (2012)
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[Referenced By]

[1] Song WJ, Sun YM, Wu YQ, Zhu ZB, Koyama S, AIChE J., 57(3), 801 (2011)

[2] Wang HG, Qiu PH, Li YQ, Han ZJ, Wu SJ, Zhao GB, Energy Fuels, 26(4), 2204 (2012)

[3] Aineto M, Acosta A, Rincon JM, Romero M, Fuel, 85(16), 2352 (2006)

[4] Nowok JW, Energy Fuels, 8(6), 1324 (1994)

[5] Song WJ, Tang LH, Zhu XD, Wu YQ, Zhu ZB, Koyama S, Energy Fuels, 24, 182 (2009)

[6] Huffman GP, Huggins FE, Dunmyre GR, Fuel, 60, 585 (1981)

[7] Wu XJ, Zhou T, Chen YS, Zhang ZX, Piao GL, Kobayashi N, Mori S, Itaya Y, Asia-Pacific J. Chem. Eng., 6, 220 (2011)

[8] Nowok JW, Hurley JP, Stanley DC, Energy Fuels, 7, 1135 (1993)

[9] Shimoda K, Tobu Y, Kanehashi K, Nemoto T, Salto K, J. Non-Cryst. Solids, 354, 1035 (2008)

[10] Lin XC, Ideta K, Miyawaki J, Takebe H, Yoon SH, Mochida I, Energy Fuels, 26(4), 2136 (2012)

[11] Thy P, Lesher CE, Jenkins BM, Fuel, 79(6), 693 (2000)

[12] Van Dyk JC, Benson SA, Laumb ML, Waanders B, Fuel, 88(6), 1057 (2009)

[13] Yuan HP, Liang QF, Gong X, Energy Fuels, 26(6), 3717 (2012)

[14] Senior CL, Srinivasachar S, Energy Fuels, 9, 277 (1986)

[15] Kondratiev A, Jak E, Fuel, 80, 1989 (2001)

[16] Vargas S, Frandsen FJ, Dam-Johansen K, Prog. Energy Combust. Sci., 27(3), 237 (2001)

[17] Nowok JW, Energy Fuels, 8(6), 1324 (1994)

[18] OH MS, BROOKER DD, DEPAZ EF, BRADY JJ, DECKER TR, Fuel Process. Technol., 44(1-3), 191 (1995)

[19] Mayoral MC, Izquierdo MT, Andres JM, Rubio B, Thermochim. Acta, 373(2), 173 (2001)

[20] Vempati RK, Rao A, Hess TR, Cocke DL, Lauer HV, Cem. Concr. Res., 24, 1153 (1994)

[21] Skvara F, Kopecky L, Smilauer V, Bittnar Z, J. Hazard. Mater., 168(2-3), 711 (2009)

[22] Oestrike R, Kirkpatrick RJ, Am. Mineralogist, 73, 534 (1988)

[23] Mackenzie KJD, Smith ME, Multinuclear Solid-State NMR of Inorganic Materials, Pergamon, 2002.

[24] Janes N, Oldfield E, J. Am. Chem. Soc., 107, 6769 (1985)

[25] He H, Guo J, Zhu J, Yuan P, Hu C, Spectroc. Acta Pt. A-Molec. Biomolec. Spectr., 60, 1061 (2004)

[26] Pardal X, Brunet F, Charpentier T, Pochard I, Nonat A, Inorg. Chem., 51(3), 1827 (2012)

[27] Merwin LH, Sebald A, Rager H, Schneider H, Phys. Chem., 18, 47 (1991)

[28] Kelsey KE, Allwardt JR, Stebbins JF, J. Non-Cryst. Solids, 354, 4644 (2008)