Korean Journal of Chemical Engineering, Vol.31, No.8, 1389-1398, August, 2014
Conversion of waste polystyrene through catalytic degradation into valuable products
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Waste expanded polystyrene (EPS) represents a source of valuable chemical products like styrene and other aromatics. The catalytic degradation was carried out in a batch reactor with a mixture of polystyrene (PS) and catalyst at 450 ℃ for 30 min in case of Mg and at 400 ℃ for 2 h both for MgO and MgCO3 catalysts. At optimum degradation conditions, EPS was degraded into 82.20±3.80 wt%, 91.60±0.20 wt% and 81.80±0.53 wt% liquid with Mg, MgO and MgCO3 catalysts, respectively. The liquid products obtained were separated into different fractions by fractional
distillation. The liquid fractions obtained with three catalysts were compared, and characterized using GC-MS. Maximum conversion of EPS into styrene monomer (66.6 wt%) was achieved with Mg catalyst, and an increase in selectivity of compounds was also observed. The major fraction at 145 ℃ showed the properties of styrene monomer. The results showed that among the catalysts used, Mg was found to be the most effective catalyst for selective conversion into
styrene monomer as value added product.
Keywords:Waste Polystyrene;Catalytic Degradation;Selective Conversion;Chemical Products;Styrene Monomer
- Onwudili JA, Insura N, Williams PT, J. Anal. Appl. Pyrolysis, 86, 293 (2009)
- Williams PT, Waste treatment & disposal, Wiley, Chichester, UK, 390 (2005).
- Ahmad Z, Al-Sagheer F, Al-Awadi NA, J. Anal. Appl. Pyrolysis, 87, 99 (2010)
- Arandes JM, Erena J, Azkoiti MJ, Olazar M, Bilbao J, J. Anal. Appl. Pyrolysis, 70, 747 (2003)
- Hussain Z, Khan KM, Hussain K, J. Anal. Appl. Pyrolysis, 89, 39 (2010)
- Chauhan RS, Gopinath S, Razdan P, Delattre C, Nirmala GS, Natarajan R, Waste Manage., 28, 2140 (2008)
- Blazso M, J. Anal. Appl. Pyrolysis, 39, 1 (1997)
- Lee CG, Kim JS, Song PS, Choi GS, Kang Y, Choi MJ, Korean J. Chem. Eng., 20(1), 133 (2003)
- Huang K, Tang LH, Zhu ZB, Ying WY, J. Anal. Appl. Pyrolysis, 76, 186 (2006)
- Kiran N, Ekinci E, Snape CE, Resour. Conserv. Recycl., 29, 273 (2000)
- Layman P, Chem. Eng. News, 4 (1993)
- Zhibo Z, Nishio S, Morioka Y, Ueno A, Ohkita H, Tochihara Y, Mizushima T, Kakuta N, Catal. Today, 29(1-4), 303 (1996)
- Lee KH, Polym. Degrad. Stabil., 93, 1284 (2008)
- Lee SY, Yoon JH, Kim JR, Park DW, J. Anal. Appl. Pyrolysis, 64, 71 (2002)
- Marcilla A, Garcia-Quesada JC, Sanchez S, Ruiz R, J. Anal. Appl. Pyrolysis, 74, 387 (2005)
- Corma A, Iborra S, Miquel S, Primo J, J. Catal., 173(2), 315 (1998)
- Jan MR, Shah J, Rahim A, American Laboratory, 4, 12 (2008)
- Woo OS, Ayala N, Broadbelt LJ, Catal. Today, 55(1-2), 161 (2000)
- Xie C, Liu F, Yu S, Xie F, Li L, Zhang S, Yang J, Catal. Commun., 9, 1132 (2008)
- Zhang ZB, Hirose T, Nishio S, Morioka Y, Azuma N, Ueno A, Ohkita H, Okada M, Ind. Eng. Chem. Res., 34(12), 4514 (1995)
- Ukei H, Hirose T, Horikawa S, Takai Y, Taka M, Azuma N, Ueno A, Catal. Today, 62(1), 67 (2000)
- Audisio G, Bertini F, Beltrame PL, Carniti P, Polym. Degrad. Stabil., 29, 191 (1990)
- Tiwary P, Guria C, J. Polym. Environ., 18, 298 (2010)
- Kronholm J, Vastamaki P, Rasanen R, Ahonen A, Hartonen K, Riekkola ML, Ind. Eng. Chem. Res., 45(9), 3029 (2006)
- Shin HY, Bae SY, J. Appl. Polym. Sci., 108(6), 3467 (2008)
- Karaduman A, Simsk EH, Cicek B, Bilgesu AY, J. Anal. Appl. Pyrolysis, 60, 179 (2001)
- Lee SY, Yoon JH, Kim JR, Park DW, Polym. Degrad. Stabil., 74, 297 (2001)
- Chumbhale VR, Kim JS, Lee WY, Song SH, Lee SB, Choi MJ, J. Ind. Eng. Chem., 11(2), 253 (2005)
- Tae JW, Jang BS, Kim JR, Kim I, Park DW, Solid State Ion., 172(1-4), 129 (2004)
- Shin HY, Bae SY, J. Appl. Polym. Sci., 108(6), 3467 (2008)
- Ke H, Li-hua T, Zi-bin Z, Cheng-fang Z, Polym. Degrad. Stabil., 89, 312 (2005)
- Hussain Z, Khan KM, Basheer N, Hussain K, J. Anal. Appl. Pyrolysis, 90, 53 (2011)
- Hu Y, Li S, J. Anal. Appl. Pyrolysis, 78, 32 (2007)