Generic placeholder image

Micro and Nanosystems

Editor-in-Chief

ISSN (Print): 1876-4029
ISSN (Online): 1876-4037

Research Article

Effect of Particle Size Distribution and Selective Alcohol Additives for Preparation of High Concentration Coal-Water Slurry

Author(s): Debadutta Das*, Anupama Routray, Swetashree Pattanaik, Pankaj K. Parhi, Bijnyan R. Das and Subrata N. Das

Volume 12, Issue 2, 2020

Page: [102 - 111] Pages: 10

DOI: 10.2174/1876402912666191010142942

conference banner
Abstract

Background: The alternative of oil is highly essential in the present context due to the acute shortage of oil as well as increasing demand for it from different public and private sectors. Since 1980, attention has been focused on coal-water slurry as an alternative fuel for the power generation industry and a suitable substitute for oil in several industrial applications. One of the exciting areas in Coal Water Slurry (CWS) is coal–water-alcohol slurry in which different alcohol compound can act as a dispersant for the stabilisation of coal–water slurry.

Objective: The objective of this paper is to prepare a high concentration coal–water-alcohol slurry using glycerol, glycol and ethanol as an additive, and different particle size distribution of coal. This will increase the surface activity of the coal thereby, decreasing the viscosity of the slurry.

Method: Two bimodal samples are prepared in which coarse particles are (212 μm - 300 μm), (150 μm – 212 μm) and fine particle below 75 μm. Three types of alcohol additive namely glycerol, glycol and ethanol are used as a dispersant. Malvern Particle size analyzer is used to measure the particle size distribution of the coal samples. Rheological study of CWAS was conducted using HAAKE RHEO STRESS 1.

Result: From the experiment, it has been concluded that the optimum addition of glycerol in water is taken as 90:10 of water and glycerol ratio because after that, there is no further decrease in the value of viscosity. An optimum value of glycol and ethanol mixed in water was determined and found as in the ratio of 86:14 and 82:18, respectively.

Conclusion: From different parameter studies like coal concentration, pH, temperature, apparent viscosity and stability, it has been concluded that coal-water-glycerol slurry is better than other coal water- alcohol slurry. This is because of the presence of more OH- groups in glycerol. The static stability of this coal-water-alcohol slurry exists for the maximum period of 31 days.

Keywords: Coal Wateralcohol Slurry (CWAS), bingham plastic model, Particle Size Distribution (PSD), rheology, additives, viscosity.

Next »
Graphical Abstract
[1]
Chen, H.; Chen, G.Q. Energy cost of rapeseed-based biodiesel as alternative energy in China. Renew. Energy, 2011, 36, 1374-1378.
[http://dx.doi.org/10.1016/j.renene.2010.11.026]
[2]
Manganaro, J.; Chen, B.; Adeosun, J.; Lakhapatri, S.; Favetta, D.; Lawal, A. Conversion of residual biomass into liquid transportation fuel: An energy analysis. Energy Fuels, 2011, 25, 2711-2720.
[http://dx.doi.org/10.1021/ef200327e]
[3]
Mishra, S.K.; Kanungo, S.B. Factors affecting the preparation of Highly Concentrated Coal–Water Slurry (HCCWS). J. Sci. Ind. Res. (India), 2000, 59, 765-790.
[4]
Manfred, R.K. Coal water slurry: A status report. Energy, 1986, 11, 1157-1162.
[http://dx.doi.org/10.1016/0360-5442(86)90052-6]
[5]
Irfan, M.; Irfan, M.A.; Khan, A.; Ullah, I.; Wazir, N. The case of coal water slurry fuel for industrial use in Pakistan. Res. J. Appl. Sci. Eng. Technol., 2015, 9(6), 460.
[http://dx.doi.org/10.19026/rjaset.9.1426]
[6]
Das, D.; Panigrahi, S.; Misra, P.K.; Nayak, A. Effect of organized assemblies. Part 4. Formulation of highly concentrated coal−water slurry using a natural surfactant. Energy Fuels, 2008, 22, 1865-1872.
[http://dx.doi.org/10.1021/ef7006563]
[7]
Senapati, P.K.; Das, D.; Nayak, A.; Misra, P.K. Studies on preparation of coal water slurry using a natural additive. Energ. Source, Part A., 2008, 30, 1788-1796.
[http://dx.doi.org/10.1080/15567030701268484]
[8]
Routray, A.; Das, D.; Parhi, P.K.; Padhy, M.K. Characterization, stabilization, and study of mechanism of coal-water slurry using Sapindous Mukorossi as an additive. Energy sourc., Part A: Recov. Utili., Environ. Effects, 2018, 40(20), 2502-2509.
[9]
Lee, S.; Speight, J.G.; Loyalka, S.K. Coal Slurry Fuel. In: Handbook of alternative fuel technologies; CRC Press: Boca Raton, FL, 2007; pp. 141-168.
[http://dx.doi.org/10.1201/9781420014518.ch4]
[10]
Li, D.; Liu, J.; Wang, J.; Bai, Q.; Cheng, J.; Cen, K. Experimental studies on coal water slurry prepared from coal gasification wastewater. Asia-Pac. J. Chem. Eng., 2018, 13(1), 1-10.
[11]
Gurses, A.; Acikyidiz, M.; Doger, C.; Karaca, S.; Bayrak, R. An investigation on effects of various parameters on viscosities of coal-water mixture prepared with Erzurum-Aşkale lignite coal. Fuel Process. Technol., 2006, 87, 821-826.
[http://dx.doi.org/10.1016/j.fuproc.2006.05.004]
[12]
Aktas, Z.; Woodburn, E.T. Effect of addition of surface-active agent on the viscosity of a high concentration slurry of a low rank British coal in water. Fuel Process. Technol., 2000, 62(23), 1-15.
[http://dx.doi.org/10.1016/S0378-3820(99)00059-4]
[13]
Boylu, F.; Atesok, G.; Dincer, H. The effect of carboxymethyl cellulose (CMC) on the stability of coal-water slurries. Fuel, 2005, 84, 315-319.
[http://dx.doi.org/10.1016/j.fuel.2003.12.016]
[14]
Wasilczyk, A. Stability of coal water slurry in the aspect of using different chemical additives. In: 16th International multidisciplinary Scientific Geo-conference SGEM. 2016, 2, 1195.
[15]
Frueh, J.; Halstead, Gam.; He, Q. Structure and thermodynamics of polyelectrolyte complexes In: Polyelectrolytes; Springer: Cham, 2014; pp. 19-86.
[16]
Mosa, E.S.; Saleh, A.H.M.; Taha, T.A.; El-Molla, A.M. Effect of chemical additives on flow characteristics of coal slurries. Physicochem. Probl. Mi., 2008, 42, 107-118.
[17]
Sadler, L.Y.; Sim, K.G. Minimize solid-liquid mixture viscosity by optimizing particle size distribution. Chem. Eng. Prog., 1991, 87, 68-71.
[18]
Pattanaik, S.; Parhi, P.K.; Das, D.; Samal, A.K. Acacia concinna: A natural dispersant for stabilization and transportation of fly ash water slurry. J. Taiwan. Inst. Chem. E, 2019, 99, 193-200.
[http://dx.doi.org/10.1016/j.jtice.2019.03.020]
[19]
Senapati, P.K.; Mohapatra, R.; Pani, G.K.; Mishra, B.K. Studies on rheological and leaching characteristics of heavy metals through selective additive in high concentration ash slurry. J. Hazard. Mater., 2012, 229-230, 390-397.
[http://dx.doi.org/10.1016/j.jhazmat.2012.06.022] [PMID: 22771345]
[20]
Senapati, P.K.; Mishra, B.K.; Sahu, A.; Kumar, V. Effective composition of high concentration fly ash bottom ash mixture slurry for efficient disposal through pipelines. Appl. Rheol., 2011, 21(2)
[21]
Senapati, P.K.; Mishra, B.K.; Parida, A. Modelling of viscosity for power plant ash slurry at higher concentration: Effect of solids, volume fraction, particle size, hydrodynamic interactions. Powder Technol., 2010, 197(11), 1-8.
[http://dx.doi.org/10.1016/j.powtec.2009.07.005]
[22]
Pani, G.K.; Rath, P.; Barik, R.; Senapati, P.K. The effect of selective additives on the rheological behavior of power plant ash slurry. Particul. Sci. Technol., 2015, 33, 418-422.
[http://dx.doi.org/10.1080/02726351.2014.990657]
[23]
Buranasrisak, P.; Narasingha, M.H. Effect of particle size distribution and packing characteristics on the preparation of highly-loaded coal water slurry. Int. J. Chem. Eng. Appl., 2012, 3(1), 31-35.
[http://dx.doi.org/10.7763/IJCEA.2012.V3.154]
[24]
Dincer, H.; Boylu, F.; Sirkeci, A.A.; Atesok, G. The effects of chemicals on the viscosity and stability of coal-water slurries. Int. J. Miner. Process., 2003, 70, 41-51.
[http://dx.doi.org/10.1016/S0301-7516(02)00149-7]
[25]
Miller, J.D.; Laskowski, J.S.; Chang, S.S. Dextrin adsorption by oxidized coal. Colloids Surf., 1983, 8, 137-151.
[http://dx.doi.org/10.1016/0166-6622(83)80081-X]
[26]
Das, D.; Panigrahi, S.; Senapati, P.K.; Misra, P.K. Effect of organized assemblies. Part 5: Study on the rheology and stabilisation of a concentrated coal-water slurry using saponin of the Acacia concinna plant. Energy Fuels, 2009, 23, 3217-3226.
[http://dx.doi.org/10.1021/ef800915y]
[27]
Das, D.; Dash, U.; Meher, J.; Misra, P.K. Improving stability of concentrated coal-water slurry using mixture of natural and synthetic surfactants. Fuel Process. Technol., 2013, 113, 41-51.
[http://dx.doi.org/10.1016/j.fuproc.2013.02.021]

© 2024 Bentham Science Publishers | Privacy Policy