Articles & Issues
- Language
- English
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
-
Received September 25, 2001
Accepted October 11, 2001
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
Degradation of Polystyrene in Supercritical n-Hexane
Department of Chemical Engineering, Hanyang University, Ansan, Kyunggi-do 425-791, Korea 1Department of Chemical Process Engineering, Toyama University, 3190Gofuku, Toyma 930-85555, Japan
Korean Journal of Chemical Engineering, November 2001, 18(6), 854-861(8), 10.1007/BF02705608
Download PDF
Abstract
Degradation of polystyrene was carried out in supercritical n-hexane under reaction temperature ranging from 330 ℃ to 390 ℃, pressure ranging from 30 bar to 70 bar and reaction duration of 90 min. The conversion of polystyrene increased with rising temperature and pressure. The degradation performance was influenced by the temperature rather than applied pressure. Polystyrene rapidly degraded in 30 min after reaching a prescribed temperature ranging from 350 ℃ to 390 ℃. At a prescribed temperature of 390 ℃, the degree of degradation was higher than 90%. The degradation reaction was examined experimentally at a relatively low temperature of 330 ℃. The degradation of polystyrene by using supercritical n-hexane has been found to be more effective compared to general pyrolysis (thermal degradation). Among the selectivity of liquid products, that of a single aromatic ring group like styrene at 390 ℃ increased up to 65% in 90 min. It was found from the analysis by a gel permeation chromatograph (GPC), that high molecular-weight compounds decreased but oligomers; increased with rising temperature.
References
Adschiri T, Sato O, Machida K, Saito N, Arai K, Kag. Kog. Ronbunshu, 23(4), 505 (1997)
Carniti P, Gervasini A, Beltrame PL, Audisio G, Bertini F, Appl. Catal. A: Gen., 127(1-2), 139 (1995)
Chen DT, Perman CA, Riechert ME, Hoven J, J. Hazard. Mater., 44, 43 (1995)
Dhawan JC, Bencsath AF, Legendre RC, Am. Chem. Soc., 380 (1993)
Hwang GC, Kim BK, Bae SY, Yi SC, Kumazawa H, J. Ind. Eng. Chem., 5(2), 150 (1999)
Hwang GC, Kim KH, Bae SY, Yi SC, Kumazawa H, Korean J. Chem. Eng., 18(3), 396 (2001)
Joung SN, Park SW, Kim SY, Yoo KP, Bae SY, J. Chem. Eng. Jpn., 34(2), 132 (2001)
Joung SN, Park SW, Kim SY, Yoo KP, Bae SY, Korean J. Chem. Eng., 16(5), 602 (1999)
Kim BK, Hwang GC, Bae SY, Yi SC, Kumazawa H, J. Appl. Polym. Sci., 81(9), 2102 (2001)
Kim SS, Chun BH, Park CJ, Yoon WL, Kim SH, HWAHAK KONGHAK, 38(5), 732 (2000)
Kim YS, Hwang GC, Bae SY, Yi SC, Korean J. Chem. Eng., 16(2), 161 (1999)
Kocher BS, Azzam FO, Lee SG, "Reaction in Supercritical Fluids," Prepared for Presentation at the AIChE Annual Meeting, November, 7 (1993)
Koll P, Metzger T, Angew. Chem.-Int. Edit., 17, 754 (1978)
Lee SB, Hong IK, J. Ind. Eng. Chem., 4(1), 26 (1998)
Model M, "Processing Methods for the Oxidation of Organics in Supercritical Water," U.S. Patent, 4,543,190 (1985)
Song HS, Hyun JC, Korean J. Chem. Eng., 16(3), 316 (1999)
Watanabe M, Hirakoso H, Sawamoto S, Adschiri T, Arai K, J. Supercrit. Fluids, 13(1), 247 (1998)
Yang M, Shibasaki Y, J. Polym. Sci. A-Polym. Chem., 36(13), 2315 (1998)
Carniti P, Gervasini A, Beltrame PL, Audisio G, Bertini F, Appl. Catal. A: Gen., 127(1-2), 139 (1995)
Chen DT, Perman CA, Riechert ME, Hoven J, J. Hazard. Mater., 44, 43 (1995)
Dhawan JC, Bencsath AF, Legendre RC, Am. Chem. Soc., 380 (1993)
Hwang GC, Kim BK, Bae SY, Yi SC, Kumazawa H, J. Ind. Eng. Chem., 5(2), 150 (1999)
Hwang GC, Kim KH, Bae SY, Yi SC, Kumazawa H, Korean J. Chem. Eng., 18(3), 396 (2001)
Joung SN, Park SW, Kim SY, Yoo KP, Bae SY, J. Chem. Eng. Jpn., 34(2), 132 (2001)
Joung SN, Park SW, Kim SY, Yoo KP, Bae SY, Korean J. Chem. Eng., 16(5), 602 (1999)
Kim BK, Hwang GC, Bae SY, Yi SC, Kumazawa H, J. Appl. Polym. Sci., 81(9), 2102 (2001)
Kim SS, Chun BH, Park CJ, Yoon WL, Kim SH, HWAHAK KONGHAK, 38(5), 732 (2000)
Kim YS, Hwang GC, Bae SY, Yi SC, Korean J. Chem. Eng., 16(2), 161 (1999)
Kocher BS, Azzam FO, Lee SG, "Reaction in Supercritical Fluids," Prepared for Presentation at the AIChE Annual Meeting, November, 7 (1993)
Koll P, Metzger T, Angew. Chem.-Int. Edit., 17, 754 (1978)
Lee SB, Hong IK, J. Ind. Eng. Chem., 4(1), 26 (1998)
Model M, "Processing Methods for the Oxidation of Organics in Supercritical Water," U.S. Patent, 4,543,190 (1985)
Song HS, Hyun JC, Korean J. Chem. Eng., 16(3), 316 (1999)
Watanabe M, Hirakoso H, Sawamoto S, Adschiri T, Arai K, J. Supercrit. Fluids, 13(1), 247 (1998)
Yang M, Shibasaki Y, J. Polym. Sci. A-Polym. Chem., 36(13), 2315 (1998)
