Effect of industrial microwave irradiation on the physicochemical properties and pyrolysis characteristics of lignite

doi:10.1016/j.cjche.2017.11.002

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (5): 1171-1178.DOI: 10.1016/j.cjche.2017.11.002

• Energy, Resources and Environmental Technology • Previous Articles Next Articles

Effect of industrial microwave irradiation on the physicochemical properties and pyrolysis characteristics of lignite

Guoshun Zhou^1,2, Qunxing Huang¹, Ben Yu¹, Hui Tong³, Yong Chi¹, Jianhua Yan¹

1 State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China;
2 Everbright Environmental Research Institute(Nanjing) Limited, Nanjing 211100, China;
3 Kunshan Jiuhua Electronic Equipment Factory, Suzhou, 215300, China

Received:2017-04-21 Revised:2017-11-09 Online:2018-06-29 Published:2018-05-28
Contact: Qunxing Huang,E-mail address:hqx@zju.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China (51621005) and the Fundamental Research Funds for the Central Universities (2017FZA4013).

Effect of industrial microwave irradiation on the physicochemical properties and pyrolysis characteristics of lignite

Guoshun Zhou^1,2, Qunxing Huang¹, Ben Yu¹, Hui Tong³, Yong Chi¹, Jianhua Yan¹

1 State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China;
2 Everbright Environmental Research Institute(Nanjing) Limited, Nanjing 211100, China;
3 Kunshan Jiuhua Electronic Equipment Factory, Suzhou, 215300, China

通讯作者: Qunxing Huang,E-mail address:hqx@zju.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (51621005) and the Fundamental Research Funds for the Central Universities (2017FZA4013).

Abstract

Abstract: The surface functional groups and pyrolysis characteristics of lignite irradiated by microwave were comparatively studied to evaluate the feasibility of using industrial 915 MHz for lignite drying. The drying kinetics, micro structure, chemical functional groups, re-adsorption properties, and pyrolysis characteristics of the dried coal were respectively analyzed. Results indicated that for typical Chinese lignite studied in this paper, 915 MHz microwave drying was 7.8 times faster than that of the hot air drying. After industrial microwave drying, the sample possessed much higher total specific surface area and specific pore volume than that of air dried sample. The oxygen functional groups and re-adsorption ratio of microwave irradiated coal decreased, showing weakened hydrophilicity. Moreover, during the pyrolysis of the coal dried by hot air and microwave, the yield of tar largely increased from 1.3% to 8.5% and the gas production increased correspondingly. The composition of the tar was also furtherly analyzed, results indicated that Miscellaneous hydrocarbons (HCs) were the main component of the tar, and microwave irradiation can reduce the fraction of polycyclic aromatic hydrocarbons (PAHs) from 26.4% to 22.7%.

Key words: Lignite, Industrial microwave, Physicochemical properties, Pyrolysis characteristics

摘要： The surface functional groups and pyrolysis characteristics of lignite irradiated by microwave were comparatively studied to evaluate the feasibility of using industrial 915 MHz for lignite drying. The drying kinetics, micro structure, chemical functional groups, re-adsorption properties, and pyrolysis characteristics of the dried coal were respectively analyzed. Results indicated that for typical Chinese lignite studied in this paper, 915 MHz microwave drying was 7.8 times faster than that of the hot air drying. After industrial microwave drying, the sample possessed much higher total specific surface area and specific pore volume than that of air dried sample. The oxygen functional groups and re-adsorption ratio of microwave irradiated coal decreased, showing weakened hydrophilicity. Moreover, during the pyrolysis of the coal dried by hot air and microwave, the yield of tar largely increased from 1.3% to 8.5% and the gas production increased correspondingly. The composition of the tar was also furtherly analyzed, results indicated that Miscellaneous hydrocarbons (HCs) were the main component of the tar, and microwave irradiation can reduce the fraction of polycyclic aromatic hydrocarbons (PAHs) from 26.4% to 22.7%.

关键词: Lignite, Industrial microwave, Physicochemical properties, Pyrolysis characteristics

Guoshun Zhou, Qunxing Huang, Ben Yu, Hui Tong, Yong Chi, Jianhua Yan. Effect of industrial microwave irradiation on the physicochemical properties and pyrolysis characteristics of lignite[J]. Chin.J.Chem.Eng., 2018, 26(5): 1171-1178.

References

[1] W.G. Willson, D. Walsh, W. Irwinc, Overview of low-rank coal (LRC) drying, Coal Prep. 18(1997) 1-15.

[2] 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(2013) 1430-1437.

[3] C.Z. Li, Some recent advances in the understanding of the pyrolysis and gasification behaviour of Victorian brown coal, Fuel 86(2007) 1664-1683.

[4] A. Tahmasebi, J. Yu, Y. Han, X. Li, A study of chemical structure changes of Chinese lignite during fluidized-bed drying in nitrogen and air, Fuel Process. Technol. 101(2012) 85-93.

[5] X. Jing, K. Jing, Z. Li, X. Liu, Y. Zhang, L. Chang, W. Bao, Thermal effect during moisture re-adsorption of dewatered lignite, J. Therm. Anal. Calorim. 119(2015) 2187-2194.

[6] D.J. Allardice, L.M. Clemow, G. Favas, W.R. Jackson, M. Marshall, R. Sakurovs, The characterisation of different forms of water in low rank coals and some hydrothermally dried products, Fuel 82(2003) 661-667.

[7] M. Karthikeyan, J.V.M. Kuma, C.S. Hoe, D.L.Y. Ngo, Factors affecting quality of dried low-rank coals, Dry. Technol. 25(2007) 1601-1611.

[8] M. Karthikeyan, W. Zhonghua, A.S. Mujumdar, Low-rank coal drying technologies-current status and new developments, Dry. Technol. 27(2009) 403-415.

[9] N. Sarunac, E. Levy, Use of Coal Drying to Reduce Water Consumed in Pulverized Coal Power Plants, Energy Research Center, Lehigh University, Bethlehem, 2005.

[10] E. Lester, S. Kingman, The effect of microwave pre-heating on five different coals, Fuel 83(2004) 1941-1947.

[11] M.S. Seehra, A. Kalra, A. Manivannan, Dewatering of fine coal slurries by selective heating with microwaves, Fuel 86(2007) 829-834.

[12] R. Vadivambal, D.S. Jayas, Changes in quality of microwave-treated agricultural products-a review, Biosyst. Eng. 98(2007) 1-16.

[13] C.A. Pickles, F. Gao, S. Kelebek, Microwave drying of a low-rank sub-bituminous coal, Miner. Eng. 62(2014) 31-42.

[14] A. Tahmasebi, J. Yu, X. Li, C. Meesri, Experimental study on microwave drying of Chinese and Indonesian low-rank coals, Fuel Process. Technol. 92(2011) 1821-1829.

[15] Y. Kumar, Application of microwave in food drying, Int. J. Eng. Stud. Tech. Approach 1(2015) 9-24.

[16] G.G. Atungulu, D.L. Smith, S.A. Wilson, H. Zhong, S. Sadaka, S. Rogers, Assessment of one-pass drying of rough rice with an industrial microwave system on milling quality, Appl. Eng. Agric. 32(2016) 417-429.

[17] S. Kelemen, P. Kwiatek, Quantification of organic oxygen species on the surface of fresh and reacted argonne premium coal, Energy Fuel 9(1995) 841-848.

[18] J. Cheng, J. Zhou, Y. Li, J. Liu, K. Cen, Improvement of coal water slurry property through coal physicochemical modifications by microwave irradiation and thermal heat, Energy Fuel 22(2008) 2422-2428.

[19] T. Grzybek, R. Pietrzak, H. Wachowska, X-ray photoelectron spectroscopy study of oxidized coals with different sulphur content, Fuel Process. Technol. 77(2002) 1-7.

[20] S. Kelemen, K. Rose, P. Kwiatek, Carbon aromaticity based on XPS-Ⅱ to Ⅱ^* asterisk signal intensity, Appl. Surf. Sci. 64(1993) 167-173.

[21] S.R. Kelemen, M. Afeworki, M.L. Gorbaty, A.D. Cohen, Characterization of organically bound oxygen forms in lignites, peats, and pyrolyzed peats by X-ray photoelectron spectroscopy (XPS) and solid-state 13C NMR methods, Energy Fuel 16(2002) 1450-1462.

[22] M. Kozlowski, XPS study of reductively and non-reductively modified coals, Fuel 83(2004) 259-265.

[23] J. Zhou, Study on the distribution of O-containing functional groups in low rank coals and its removal methods, Ph.D. Thesis, China University of Mining & Technology (Beijing), China, 2014.

[24] Y. Fei, Y. Artanto, L. Giroux, M. Marshall, W.R. Jackson, J.A. MacPhee, J.P. Charland, A.L. Chaffee, D.J. Allardice, Comparison of some physico-chemical properties of Victorian lignite dewatered under non-evaporative conditions, Fuel 85(2006) 1987-1991.

[25] H. Choi, C. Thiruppathiraja, S. Kim, Y. Rhim, J. Lim, S. Lee, Moisture readsorption and low temperature oxidation characteristics of upgraded low rank coal, Fuel Process. Technol. 92(2011) 2005-2010.

[26] T.L. Liu, J.P. Cao, X.Y. Zhao, J.X. Wang, X.Y. Ren, X. Fan, Y.P. Zhao, X.Y. Wei, In situ upgrading of Shengli lignite pyrolysis vapors over metal-loaded HZSM-5 catalyst, Fuel Process. Technol. 160(2017) 19-26.

[27] P.R. Solomon, M.A. Serio, R.M. Carangelo, J.R. Markham, Very rapid coal pyrolysis, Fuel 65(1986) 182-194.

[28] M. Versan Kok, E. Ozbas, O. Karacan, C. Hicyilmaz, Effect of particle size on coal pyrolysis, J. Anal. Appl. Pyrolysis 45(1998) 103-110.

[29] P. Solomon, D. Hamblen, Z. Yu, M. Serio, Network models of coal thermaldecomposition, Fuel 69(1990) 754-763.

[30] Q. Liu, H. Hu, Q. Zhou, S. Zhu, G. Chen, Effect of inorganic matter on reactivity and kinetics of coal pyrolysis, Fuel 83(2004) 713-718.

[31] X. Wang, H. Chen, K. Luo, J. Shao, H. Yang, The influence of microwave drying on biomass pyrolysis, Energy Fuel 22(2008) 67-74.

[32] C. Sathe, J.I. Hayashi, C.Z. Li, Release of volatiles from the pyrolysis of a Victorian lignite at elevated pressures, Fuel 81(2002) 1171-1178.

[33] Q. Huang, Y. Tang, S. Lu, X. Wu, Y. Chi, J. Yan, Characterization of tar derived from principle components of municipal solid waste, Energy Fuel 29(2015) 7266-7274.

[34] M.E. Sanchez, J.A. Menendez, A. Dominguez, J.J. Pis, O. Martinez, L.F. Calvo, P.L. Bernad, Effect of pyrolysis temperature on the composition of the oils obtained from sewage sludge, Biomass Bioenergy 33(2009) 933-940.

[35] L.P.L.M. Rabou, R.W.R.Z. Zwart, B.J. Vreugdenhil, L. Bos, Tar in biomass producer gas, the Energy research Centre of the Netherlands (ECN) experience:an enduring challenge, Energy Fuel 23(2009) 6189-6198.

Effect of industrial microwave irradiation on the physicochemical properties and pyrolysis characteristics of lignite

Effect of industrial microwave irradiation on the physicochemical properties and pyrolysis characteristics of lignite

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 9

Recommended Articles

Metrics

Comments

[1]	Wang Du, Liping Ma, Jing Yang, Wei Zhang, Ran Ao. Experimental and numerical simulation of lignite chemical looping gasification with phosphogypsum as oxygen carrier in a fluidized bed [J]. Chinese Journal of Chemical Engineering, 2021, 37(9): 197-207.
[2]	Boyang Bai, Luyao Qiang, Suisui Zhang, Zhiwei Peng, Hang Mu, Xiaoxun Ma. The effect of hydrothermal pretreatment on the structure and fast pyrolysis behaviors of ShengLi lignite [J]. Chinese Journal of Chemical Engineering, 2021, 35(7): 265-274.
[3]	Andrew Ng Kay Lup, Faisal Abnisa, Wan Mohd Ashri Wan Daud, Mohamed Kheireddine Aroua. Synergistic interaction of metal–acid sites for phenol hydrodeoxygenation over bifunctional Ag/TiO₂ nanocatalyst [J]. Chin.J.Chem.Eng., 2019, 27(2): 349-361.
[4]	Yangyang Zhang, Xianyong Wei, Jinghui Lü, Hao Jiang, Fangjing Liu, Guanghui Liu, Zhimin Zong. Characterization of nitrogen-containing aromatics in Baiyinhua lignite and its soluble portions from thermal dissolution [J]. Chinese Journal of Chemical Engineering, 2019, 27(11): 2783-2787.
[5]	Yixin Zhang, Jixiang Dong, Fanhui Guo, Xiaokai Chen, Jianjun Wu, Zhenyong Miao. Experimental study on the effects of drying methods on the stabilities of lignite [J]. Chin.J.Chem.Eng., 2018, 26(7): 1545-1554.
[6]	Xianliang Meng, Mingqiang Gao, Ruizhi Chu, Zhenyong Miao, Guoguang Wu, Lei Bai, Peng Liu, Yuanfang Yan, Pengcheng Zhang. Construction of a macromolecular structural model of Chinese lignite and analysis of its low-temperature oxidation behavior [J]. , 2017, 25(9): 1314-1321.
[7]	Tazien Rashid, Chong Fai Kait, Thanabalan Murugesan. Effect of alkyl chain length on the thermophysical properties of pyridinium carboxylates [J]. Chin.J.Chem.Eng., 2017, 25(9): 1266-1272.
[8]	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]. Chin.J.Chem.Eng., 2016, 24(6): 803-810.
[9]	LÜ Guocheng, HAO Jiao, LIU Liu, MA Hongwen, FANG Qinfang, WU Limei, WEI Mingquan, ZHANG Yihe. The Adsorption of Phenol by Lignite Activated Carbon [J]. , 2011, 19(3): 380-385.