Journal of Industrial and Engineering Chemistry, Vol.9, No.5, 584-589, September, 2003
Catalytic Degradation of Waste HDPE over Acidic Catalysts with Different Pore Sizes
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The catalytic degradation of waste high-density polyethylene (HDPE) over solid acid catalysts (zeolite Y, silica-alumina (SA), fluid catalytic cracking (FCC) catalyst) with different physicochemical properties in a stirred semi-batch reactor at 450 ℃ was investigated. The product yield and composition of the liquid product were compared for three catalysts. Zeolite Y with mainly micropores showed the highest gas yield and lowest liquid yield, despite its mild acidic properties, while the SA catalyst with only mesopores showed a higher liquid yield than zeolite Y. Among the three catalysts, the FCC catalyst with a bimodal pore size distribution and mild acidic properties exhibited the best catalytic performance for liquid yield. The catalysts containing zeolite Y enhanced the production of the aromatic component. These results suggest the proper physicochemical properties for a catalyst to enhance the catalytic degradation of waste plastics into useful liquid products.
- Bagri R, Williams PT, J. Anal. Appl. Pyrolysis, 63, 29 (2002)
- Walendziewski J, Fuel, 81, 473 (2002)
- Schirmer J, Kim JS, Klemm E, J. Anal. Appl. Pyrolysis, 60, 205 (2001)
- Walendziewski J, Steininger M, Catal. Today, 65(2-4), 323 (2001)
- Seddegi ZS, Budrthumal U, Al-Arfaj AA, Al-Amer AM, Barri SAI, Appl. Catal. A: Gen., 225(1-2), 167 (2002)
- de la Puente G, Klocker C, Sedran U, Appl. Catal. B: Environ., 36(4), 279 (2002)
- Lee KH, Kim SG, Shin DH, J. KSWES, 18, 442 (2001)
- Uddin MA, Koizumi K, Murata K, Sakata Y, Polym. Degrad. Stabil., 56, 37 (1997)
- Park JW, Kim JH, Seo G, Polym. Degrad. Stabil., 76, 495 (2002)
- Lee KH, Lee YW, Ha BH, J. Catal., 178(1), 328 (1998)
- Lee KH, Shin DH, Korean J. Chem. Eng., in press
- Lee KH, Ha BH, Lee YW, Ind. Eng. Chem. Res., 37(5), 1761 (1998)
- Manos G, Garforth A, Dwyer J, Ind. Eng. Chem. Res., 39(5), 1198 (2000)
- Lee SY, Yoon JH, Park DW, J. Ind. Eng. Chem., 8(2), 143 (2002)
- Ochoa R, VanWoert H, Lee WH, Subramanian R, Kugler E, Eklund PC, Fuel Process. Technol., 49(1), 119 (1996)
- Manos G, Yusof IY, Papayannakos N, Gangas NH, Ind. Eng. Chem. Res., 40(10), 2220 (2001)
- Lee KH, Noh NS, Shin DH, Seo YH, Polym. Degrad. Stabil., 78, 539 (2002)
- Sakata Y, Uddin MA, Muto A, Kanada Y, Koizumi K, Murata K, J. Anal. Appl. Pyrolysis, 43, 15 (1997)
- Audisio G, Bertini F, Beltrame PL, Carniti P, Polym. Degrad. Stabil., 26, 209 (1989)