Evolvement behavior of microstructure and H2O adsorption of lignite pyrolysis

doi:10.1016/j.cjche.2016.04.012

Chinese Journal of Chemical Engineering ›› 2016, Vol. 24 ›› Issue (6): 803-810.DOI: 10.1016/j.cjche.2016.04.012

• 第25届中国过程控制会议专栏 • 上一篇下一篇

Evolvement behavior of microstructure and H₂O adsorption of lignite pyrolysis

Yingyue Teng, Shijun Lian, Quansheng Liu, Yuzhe Liu, Yinmin Song, Runxia He, Keduan Zhi

College of Chemical Engineering, Inner Mongolia University of Technology, Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, China

收稿日期:2015-11-18 修回日期:2016-03-06 出版日期:2016-06-28 发布日期:2016-07-12
通讯作者: Quansheng Liu
基金资助:
Supported by the National Science Foundation of China (Nos. 21566029, 21566028 and 21266017).

Evolvement behavior of microstructure and H₂O adsorption of lignite pyrolysis

Yingyue Teng, Shijun Lian, Quansheng Liu, Yuzhe Liu, Yinmin Song, Runxia He, Keduan Zhi

College of Chemical Engineering, Inner Mongolia University of Technology, Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, China

Received:2015-11-18 Revised:2016-03-06 Online:2016-06-28 Published:2016-07-12
Contact: Quansheng Liu
Supported by:
Supported by the National Science Foundation of China (Nos. 21566029, 21566028 and 21266017).

摘要/Abstract

摘要： The effect of pyrolysis on the microstructure and moisture adsorption of lignite was investigated with low field nuclear magnetic resonance spectroscopy. Changes in oxygen-containing groups were analyzed by Fourier transform infrared spectroscopy (FTIR), and H₂O adsorption mechanism on the surface of lignite pyrolysis was inferred. Two major changes in the pore structure of lignite char were observed as temperature increased in 105-200℃ and 500-700℃. Pyrolysis temperature is a significant factor in removing carboxyl and phenolic hydroxyl from lignite. Variation of ether bond content can be divided into three stages; the content initially increased, then decreased, and finally increased. The equilibrium adsorption ratio, content of oxygen-containing groups, and variation of pore volume below 700° were closely correlated with each other. The amount of adsorbed water on char pyrolyzed at 700℃ increased. Moreover, the adsorption capacity of the lignite decreased, and the adsorption state changed.

关键词: Lignite, Pore structure, Moisture adsorption, Oxygen-containing Groups

Abstract: The effect of pyrolysis on the microstructure and moisture adsorption of lignite was investigated with low field nuclear magnetic resonance spectroscopy. Changes in oxygen-containing groups were analyzed by Fourier transform infrared spectroscopy (FTIR), and H₂O adsorption mechanism on the surface of lignite pyrolysis was inferred. Two major changes in the pore structure of lignite char were observed as temperature increased in 105-200℃ and 500-700℃. Pyrolysis temperature is a significant factor in removing carboxyl and phenolic hydroxyl from lignite. Variation of ether bond content can be divided into three stages; the content initially increased, then decreased, and finally increased. The equilibrium adsorption ratio, content of oxygen-containing groups, and variation of pore volume below 700° were closely correlated with each other. The amount of adsorbed water on char pyrolyzed at 700℃ increased. Moreover, the adsorption capacity of the lignite decreased, and the adsorption state changed.

Key words: Lignite, Pore structure, Moisture adsorption, Oxygen-containing Groups

Yingyue Teng, Shijun Lian, Quansheng Liu, Yuzhe Liu, Yinmin Song, Runxia He, Keduan Zhi. Evolvement behavior of microstructure and H₂O adsorption of lignite pyrolysis[J]. Chinese Journal of Chemical Engineering, 2016, 24(6): 803-810.

参考文献

[1] C. Li, Advances in the science of Victorian brown coal, Chemical Industry Press, Beijing, 200965-75.

[2] Muthusamy Karthikeyan, Wu Zhonghua, Arun S. Mujumdar, Low-Rank Coal Drying Technologies-Current Status and New Developments, Dry. Technol. 27(3) (2009) 403-415.

[3] Y. Yu,W. Liang, Y. Hu, Q.Meng, Study ofmicro-pores development in lean coal with temperature, Int. J. Rock Mech. Min. 51(4) (2012) 91-96.

[4] C.E. Salmas, A.H. Tsetsekou, K.S. Hatzilyberis, G.P. Androutsopoulos, Evolution lignite mesopore structure during drying, effect of temperature and heating time, Dry. Technol. 19(1) (2001) 35-64.

[5] Y. Yang, X. Jing, Z. Li, X. Liu, Y. Zhang, L. Chang, Effect of drying conditions on moisture re-adsorption performance of dewatered lignite, Dry. Technol. 31(12) (2013) 1430-1437.

[6] G. Zhou, J. Wu, Z. Miao, X. Hu, X. Li, X. Xin Shi, Z. Cai, Y. Shang, Effects of process parameters on pore structure of semi-coke prepared by solid heat carrier with dry distillation, Int. J. Min. Sci. Technol. 23(3) (2013) 423-427.

[7] M. Sakaguchi, K. Laursen, H. Nakagawa, K. Miura, Hydrothermal upgrading of Loy Yang brown coal-effect of upgrading conditions on the characteristics of the products, Fuel Process. Technol. 89(4) (2008) 391-396.

[8] Olayinka I. Ogunsola, Thermal upgrading effect on oxygen distribution in lignite, Fuel Process. Technol. 34(1) (1993) 73-81.

[9] H.N.S. Schafer, Pyrolysis of brown coals. 2. Decomposition of acidic groups on heating in the range 100-900℃, Fuel 58(9) (1979) 673-679.

[10] J. Yu, A. Tahmasebi, Y. Han, F. Yin, X. Li, A review on water in low rank coals:The existence, interaction with coal structure and effects on coal utilization, Fuel Process. Technol. 106(1) (2013) 9-20.

[11] H. Choi, C. Thiruppathiraja, S. Kim, Moisture re-adsorption and low temperature oxidation characteristics of upgraded low rank coal, Fuel Process. Technol. 92(10) (2011) 2005-2010.

[12] Y. Zhang, X. Jing, K. Jing, Study on the pore structure and oxygen-containing functional groups devoting to the hydrophilic force of dewatered lignite, Appl. Surf. Sci. 324(2014) 90-98.

[13] D. Li,W. Li, B. Li, In situ diffuse reflectance FTIR study on water in lignite, Chem. Res. Chin. Univ. 23(12) (2002) 2325-2328.

[14] Y. Yao, D. Liu, S. Xie, Quantitative characterization of methane adsorption on coal using a low-field NMR relaxation method, Int. J. Coal Geol. 131(2) (2014) 32-40.

[15] H.S. Kim, Y. Nishiyama, K. Ideta, M. Jin, Y. Matsushita, J.I. Park, Analysis of water in Loy Yang brown coal using solid-state ¹H NMR, J. Ind. Eng. Chem. 19(5) (2013) 1673-1679.

[16] Y. Teng, S. Lian, Y. Song, Q. Liu, H. Yu, Y. Li, Relaxation time and pore structure evolution of Sheng Li lignite during in situ low temperature drying using ¹H NMR, J. China Coal Soc. 39(12) (2014) 2525-2530.

[17] Y. Teng, Q. Liu, K. Zhi, H. Yu, C. Chen, J. Zhao, Study of thewatermigration and drying kinetics of Sheng Li lignite in the upgrading process, Mater. Rev. 28(4) (2014) 145-148.

[18] W. Liu, L. Xing, Nuclear magnetic resonance logging, Petroleum Industry Press, Beijing, 201186-88.

[19] Y. Yao, D. Liu, Y. Che, D. Tang, S. Tang, W. Huang, Petrophysical characterization of coals by low-field nuclear magnetic resonance (NMR), Fuel 89(7) (2010) 1371-1380.

[20] Y. Yao, D. Liu, Advanced characterization of pores and fractures in coals by nuclear magnetic resonance and X-ray computed tomography, Sci. China Earth Sci. 53(6) (2010) 854-862.

[21] D.G. Evans, The brown-coal/water system:Parts 4. Shrinkage on drying, Fuel 52(3) (1973) 186-190.

[22] X. Zhu, C. Sheng, Evolution of the char structure of lignite under heat treatment and its influences on combustion reactivity, Energy Fuel 24(1) (2010) 152-159.

[23] M. Wang, Z. Li, W. Huang, J. Yang, H. Xue, Coal pyrolysis characteristics by TG-MS and its late gas generation potential, Fuel 156(15) (2015) 243-253.

[24] A. Tahmasebi, J. Yu, Y. Han, F. Yin, S. Bhattacharya, D. Stokie, Study of chemical structure changes of Chinese lignite upon drying in superheated steam, microwave, and hot air, Energy Fuel 26(6) (2012) 3651-3660.

[25] P.H. Giver, The distribution of hydroxyl in coal and its relation to coal structure, Fuel 39(1) (1960) 147.

[26] K. Xie, Coal structure and its reactivity, Science Press, Beijing, 2002210-218.

[27] C.A. Tapas, J.C. Cjarles, R.V. Victor, Effect of thermal pretreatment on equilibrium moisture content of lignocellulosic biomass, Bioresour. Technol. 102(7) (2011) 4849-4854.

[28] D. Wang, X. Zhong, J. Gu, X. Qi, Changes in active functional groups during lowtemperature oxidation of coal, Min. Sci. Technol. 20(1) (2010) 35-40.

[29] C. Cao, The hydrophobic index of alkyl group, Chin. J. Org. Chem. 16(2) (1996) 133-138.

[30] H.H. Wang, Kinetic analysis of dehydration of a bituminous coal using the TGA technique, Energy Fuel 21(6) (2007) 3070-3075.

Evolvement behavior of microstructure and H₂O adsorption of lignite pyrolysis

Evolvement behavior of microstructure and H₂O adsorption of lignite pyrolysis

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