Heat Treatment of Pitch Obtained from Atmospheric Fixed-Bed Coal Gasification

Phiciato Phiciato; Ika Monika; Arie Hardian

doi:10.22146/ijc.31731

Heat Treatment of Pitch Obtained from Atmospheric Fixed-Bed Coal Gasification

https://doi.org/10.22146/ijc.31731

Phiciato Phiciato^(1*), Ika Monika⁽²⁾, Arie Hardian⁽³⁾

(1) TEKMIRA Research Center for Minerals and Coal, Ministry of Energy and Mineral, Resources of the Republic of Indonesia, Jl. Jenderal Sudirman No. 623, Bandung 40211, Indonesia
(2) TEKMIRA Research Center for Minerals and Coal, Ministry of Energy and Mineral, Resources of the Republic of Indonesia, Jl. Jenderal Sudirman No. 623, Bandung 40211, Indonesia
(3) Department of Chemistry, Faculty of Sciences and Informatics, Universitas Jenderal Achmad Yani, PO Box 148, Jl. Terusan Jenderal Sudirman, Cimahi 40285, Indonesia
(*) Corresponding Author

Abstract

A medium temperature pitch obtained from atmospheric fixed-bed gasifier was distilled at a various time (1, 2, 3 and 4 h) to induce polymerization and the results were compared with a commercial pitch. Aromaticity level of pitches was examined using infrared spectroscopy, elemental analysis and simultaneous thermal analysis (TG-DSC). Longer heating time promoted lower moisture content, lower residue yield, higher insoluble fractions, as well as higher ash and carbon content. Although prolonged heat treatments lead to higher aromatization, there was no significant change in aromatization for heat treatment longer than 1 h. The index of aromaticity measured by using elemental analysis was ranged between 0.47 to 1.01, while the result from FTIR spectra showed stagnant value at 0.52. These values were slightly higher than that of pressurized Sasol-Lurgi gasification pitch (0.27).

Keywords

coal tar pitch; distillation; coal gasification; aromaticity index; infrared spectroscopy

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References

[1] Li, C., and Suzuki, K., 2010, Resources, properties and utilization of tar, Resour. Conserv. Recycl., 54 (11), 905–915.

[2] Baron, J.T.,, McKinney, S.A.,, and Wombles, R.H.,, 2016, “Coal Tar Pitch-Past, Present and Future” in Essential Readings in Light Metals, Eds. Tomsett, A., and Johnson J., Springer International Publishing, Cham, 177–181.

[3] Perruchoud, R.C., Meier, M.W., and Fischer, W., 2016, “Worldwide Pitch Quality for Prebaked Anodes” in Essential Readings in Light Metals, Eds. Tomsett, A., and Johnson J., Springer International Publishing, Cham, 167–176.

[4] Ikhwan, A., 2015, Market Brief Peluang Ekspor dan Senyawa Hidrokarbon, Taipei Economic and Trade Office, Jakarta.

[5] García, R., Crespo, J.L., Martin, S.C., Snape, C.E., and Moinelo, S.R., 2003, Development of mesophase from a low-temperature coal tar pitch, Energy Fuels, 17 (2), 291–301.

[6] Mokoena, K., Van der Walt, T.J., Morgan, T.J., Herod, A.A., and Kandiyoti, R., 2008, Heat treatment of medium-temperature Sasol–Lurgi gasifier coal-tar pitch for polymerizing to higher value products, Fuel, 87 (6), 751–760.

[7] Wang, X., Shen, J., Niu, Y., Sheng, Q., Liu, G., and Wang, Y., 2016, Solvent extracting coal gasification tar residue and the extracts characterization, J Cleaner Prod., 133, 965–970.

[8] Pan, N., Cui, D., Li, R., Shi, Q., Chung, K.H., Long, H., Li, Y., Zhang, Y., Zhao, S., and Xu, C., 2012, Characterization of middle-temperature gasification coal tar. Part 1: Bulk properties and molecular compositions of distillates and basic fractions, Energy Fuels, 26 (9), 5719–5728.

[9] Suriyapraphadilok, U., Jennis-McGroarty, C., Zel, A., and Andresen, J.M., 2004, The use of gasification pitch and coal tar pitch in carbon anodes, Prepr. Pap. - Am. Chem. Soc., Div. Fuel Chem., 49 (1), 455–456.

[10] van Dyk, J.C., Keyser, M.J., and Coertzen, M., 2006, Syngas production from South African coal sources using Sasol-Lurgi gasifiers, Int. J. Coal Geol., 65 (3-4), 243–253.

[11] Wang, P., Jin, L., Liu, J., Zhu, S., and Hu, H., 2013, Analysis of coal tar derived from pyrolysis at different atmospheres, Fuel, 104, 14–21.

[12] Sima, L., Blanco, C., Santamarı́a, R., Granda, M., Slaghuis, H., and Menéndez, R., 2003, Relationship between chemical composition and pyrolysis behaviour of a medium temperature pitch (or Lurgi-gasifier pitch), Fuel Process. Technol., 84 (1-3), 63–77.

[13] Pérez, M., Granda, M., Santamaría, R., Morgan, T., and Menéndez, R., 2004, A thermoanalytical study of the co-pyrolysis of coal-tar pitch and petroleum pitch, Fuel, 83 (9), 1257–1265.

[14] Guillen, M.D., Iglesias, M.J., Dominguez, A., and Blanc, C.G., 1992, Semiquantitative FTIR analysis of a coal tar pitch and its extracts and residues in several organic solvents, Energy Fuels, 6 (4), 518–525.

[15] Alcañiz-Monge, J., Cazorla-Amorós, D., and Linares-Solano, A., 2001, Characterisation of coal tar pitches by thermal analysis, infrared spectroscopy and solvent fractionation, Fuel, 80 (1), 41–48.

DOI: https://doi.org/10.22146/ijc.31731