Co-Pyrolysis Characteristics and Product Distributions of Coal Tailings and Biomass Blends

Abstract:

In order to make better utilization of coal tailings (low quality production after coal preparation) as the resources, the pyrolysis characteristics and product distributions during co-pyrolysis of coal tailings together with biomass at different ratio (20%, 40%, 60% and 80%) were determined in thermogravimetric analysis (TGA) and a fixed bed reactor in this paper. Coal tailings (TC) selected was provided by Hexi coal in Shanxi province, and pine branch wastes (PBW) were used as biomass samples. The result of TGA experiments indicates that the temperature corresponding to the maximum pyrolysis rate exhibited a significant difference between TC and PBW, and the value of the calculated TGA and DTG curves is similar to the experimental ones. In a fixed bed experiments within a temperature range of 25-900°C, gas product yields of co-pyrolysis of TC and PBW are higher than those of the sum of them individually, while tar and char yields were on the contrary. It shows some synergetic effect exists during co-pyrolysis process of TC and PBW blends, and the maximum synergy exhibits with a PBW blending ratio of 40%. CO yield increases up to 30% at 400°C and CH₄ yield increases up to 11.33% at 700°C compared with the calculated value. These findings can potentially help to understand and predict the behavior of coal tailings/biomass blends in practical systems.

• Periodical: Advanced Materials Research (Volume 878)
• Pages: 177-184
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.878.177
• Online since: January 2014
• Authors: He Long Hui, Jin Wei Jia, Yun Zhao Wei, Shu Cheng Liu, Xing Min Fu, Xin Qian Shu
• Keywords: Biomass, Coal Tailings, Co-Pyrolysis, Product Distributions, Synergetic Effects

References

[1] C. Ryu, K. Finney, V. N. Sharifi, J. Swithenbank, Palletized fuel production from coal tailings and spent mushroom compost – Part I Identification of pelletisation parameters. Fuel Process. Technol. 89 (2008) 269–275.

DOI: 10.1016/j.fuproc.2007.11.035

[2] C.N. Hamelinck, A.P.C. Faaij, H.D. Uil, et al, Production of FT transportation fuels from biomass; technical options, process analysis and optimisation, and development potential, Energy. 29 (2004) 1743–1771.

DOI: 10.1016/j.energy.2004.01.002

[3] M. Sami, K. Annamalai, M. Wooldridge, Co-firing of coal and biomass fuel blends, Prog. Energy Combust Sci. 27 (2001) 171–214.

DOI: 10.1016/s0360-1285(00)00020-4

[4] D.K. Park, S.D. Kim, S.H. Le, et al, Co-pyrolysis characteristics of sawdust and coal blend in TGA and a fixed bed reactor, Bioresour. Technol. 101 (2010) 6151–6156.

DOI: 10.1016/j.biortech.2010.02.087

[5] E. Kastanaki, D. Vamvuka, P. Grammelis, et al, Thermogravimetric studies of the behavior of lignite–biomass blends during devolatilization, Fuel Process. Technol. 77–78 (2002) 159–166.

DOI: 10.1016/s0378-3820(02)00049-8

[6] C. Meesri, B. Moghtaderi, Lack of synergistic effects in the pyrolytic characteristics of woody biomass/coal blends under low and high heating rate regimes, Biomass Bioenergy. 23 (2002) 55–66.

DOI: 10.1016/s0961-9534(02)00034-x

[7] W.H. Chen, J.S. Wu, An evaluation on rice husks and pulverized coal blends using a drop tube furnace and a thermogravimetric analyzer for application to a blast furnace, Energy. 34 (2009) 1458–1466.

DOI: 10.1016/j.energy.2009.06.033

[8] B. Moghtaderi, C. Meesri, T.F. Wall, Pyrolytic characteristics of blended coal andwoody biomass, Fuel. 83 (2004) 745–50.

DOI: 10.1016/j.fuel.2003.05.003

[9] H. Haykiri-Acma, S. Yaman, Interaction between biomass and different rank coals during co-pyrolysis, Renewable Energy. 35 (2010) 288–292.

DOI: 10.1016/j.renene.2009.08.001

[10] K.M. Lu, W.J. Lee, W.H. Chen, et al, Thermogravimetric analysis and kinetics of co-pyrolysis of raw/torrefied wood and coal blends, Appl. Energy. 105 (2013) 57–65.

DOI: 10.1016/j.apenergy.2012.12.050

[11] H.B. Vuthaluru, Investigations into the pyrolytic behaviour of coal/biomass blends using thermogravimetric analysis, Bioresource Technol. 92 (2004) 187–195.

DOI: 10.1016/j.biortech.2003.08.008

[12] B. Moghtaderi, C. Meesri, T.F. Wall. Pyrolytic characteristics of blended coal and woody biomass, J. Fuel. 83 (2004) 745–750.

DOI: 10.1016/j.fuel.2003.05.003

[13] H. Haykiri-Acma, S. Yaman. Interaction between biomass and different rank coals during co-pyrolysis, Renewable Energy. 35 (2010) 288–292.

DOI: 10.1016/j.renene.2009.08.001

[14] E. Kastanaki, D. Vamvuka, P. Grammelis, et al, Thermogravimetric studies of the behavior of lignite-biomass blends during devolatilization, Fuel Process Technol. 77–78 (2002) 159–166.

DOI: 10.1016/s0378-3820(02)00049-8

[15] T. Sonobe, N. Worasuwannarak, S. Pipatmanomai, Synergies in co-pyrolysis of Thai lignite and corncob, Fuel Process Technol. 89 (2008) 1371–1378.

DOI: 10.1016/j.fuproc.2008.06.006

[16] T.W. Nathan, C.M. Nichola, D.M. Bryan, Product distributions from isothermal co-pyrolysis of coal and biomass, Fuel. 94 (2012) 563–570.

DOI: 10.1016/j.fuel.2011.10.046

[17] S.V. Vassilev, D. baxter, L.K. Andersen, et al, An overview of the chemical composition of biomass, Fuel. 89 (2010) 913–933.

DOI: 10.1016/j.fuel.2009.10.022

[18] R. Xu, L. Ferrante, C. Briens, et al, Flash pyrolysis of grape residues intobiofuel in a bubbling fluid bed, J. Anal. Appl. Pyrolysis. 86 (2009) 58–65.

DOI: 10.1016/j.jaap.2009.04.005

[19] H. Zhang, R. Xiao, H. Huang, et al, Comparison of non-catalytic and catalytic fast pyrolysis of corncob in a fluidized bed reactor, Bioresour. Technol. 100 (2009) 1428–1434.

DOI: 10.1016/j.biortech.2008.08.031

[20] J. Yanik, C. Kornmayer, M. Saglam, et al, Fast pyrolysis of agricultural wastes: Characterization of pyrolysis products, Fuel Process Technol. 88 (2007) 942–947.

DOI: 10.1016/j.fuproc.2007.05.002

[21] T. Hosoya, H. Kawamoto, S. Saka, Pyrolysis gasification reactivities of primary tar and char fractions from cellulose and lignin as studied with a closed ampoule reactor, J. Anal. Appl. Pyrol. 83 (2008) 71–77.

DOI: 10.1016/j.jaap.2008.06.002

[22] N. Worasuwannarak, T. Sonobe, W. Tanthapanichakoon, Pyrolysis behaviours of rice straw, rice husk, and corncob by TG–MS technique, J. Anal. Appl. Pyrol. 78 (2007) 265–271.

DOI: 10.1016/j.jaap.2006.08.002

[23] R.K. Harma, J.B. Wooten, V.L. Baliga, et al, Fuel. 83 (2004) 1469–1482.

[24] I. Suelves, M.J. Lázaro, R. Moliner, J. Anal. Appl. Pyrolysis. 65 (2002) 197–206.

[25] C.A. Ulloa, A.L. Gordon, X.A. Garcia, Thermogravimetric study of interactions in the pyrolysis of blends of coal with radiate pine sawdust, Fuel Process Technol. 90 (2009) 583-590.

DOI: 10.1016/j.fuproc.2008.12.015