The catalytic performance for LDPE destruction over aluminum-incorporated mesoporous silicates

Kyung Mi Jeong; Misook Kang

Journal of Industrial and Engineering Chemistry, Vol.14, No.6, 847-852, November, 2008

DOI10.1016/j.jiec.2008.06.008 Export Citation

The catalytic performance for LDPE destruction over aluminum-incorporated mesoporous silicates

Kyung Mi Jeong, and Misook Kang^{1, †}

Department of Chemistry, Busan National University, Jangjeundong 30, Kumjongku, Busan 609-735, South Korea
¹Department of Chemistry, College of Science, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, South Korea

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The aim of this study was to investigate the aluminum-incorporated mesoporous silicate (Al-MPS) as a thermal catalyst for the destruction of low density polyethylene (LDPE). Various Al-MPS (Si/Al molar ratios = 117.6, 58.8, 39.2 and 29.4) materials were successfully synthesized without any structural damage. With regard to the X-ray diffraction (XRD) pattern, the main peak of 2u = 64.0 in Al2O3 did not show until the incorporation of Si/Al = 58.8. This result implies the aluminum ions were stably substituted into the silicon site of the mesoporous framework. The hexagonal straight pore size increased to about 8.0 nm in Al (Si/Al = 58.8)-MPS, but then decreased in the range of 3.0.5.0 nm in Al (Si/Al = 29.4)-MPS. In relation to the amount of incorporated aluminum, the Al-MPS absorbed many pyridine molecules, implying the acidities on the external surfaces up to Si/Al = 58.8, but this amount decreased somewhat above a Si/Al ratio of 39.2. The catalytic decomposition of LDPE was enhanced in Al (Si/Al = 58.8)-MPS and particularly, the selectivity to light hydrocarbons below C4 reached 43%.

Keywords:Aluminum-incorporated mesoporous silicate (Al-MPS);Si/Al molar ratios;LDPE (low density polyethylene) destruction;Hydrophilic property;Acidities

[References]

Kokotailo GT, Lawton SL, Olson DH, Nature, 272, 437 (1978)
Yang BL, Kung HH, Environ. Sci. Technol., 28, 1561 (1994)
Burke NR, Trimm DL, Howe R, Stud. Surf. Sci. Catal., 130, 1451 (2000)
Czaplewski KF, Reitz TL, Kim YJ, Snurr RQ, Micropor. Macropor. Mater., 56, 55 (2002)
Nho YC, Kim JI, Kang PH, J. Ind. Eng. Chem., 12(6), 888 (2006)
Jeon JK, Park YK, Kim SS, Cho D, Kim JC, J. Ind. Eng. Chem., 13(5), 735 (2007)
Kresge CT, Leonowicz ME, Roth WJ, Varyuli JC, Beck JS, Nature, 359, 710 (1992)
Beck JS, J. Am. Chem. Soc., 114, 10834 (1992)
Chen CY, Xiao SO, Davis ME, Micropor. Mater., 4, 1 (1995)
CarValho WA, Varaldo PB, Wallau M, Schuchardt U, Zeolites, 18, 408 (1997)
Zhibo Z, Nishio S, Morioka Y, Ueno A, Ohkita H, Tochihara Y, Mizushima T, Kakuta N, Catal. Today, 29(1-4), 303 (1996)
Kang M, Hong WJ, Park MS, Appl. Catal. B: Environ., 53(3), 195 (2004)
Szostak R, Molecular Sieves, Principle of Synthesis of Identification, Van Nostrand Reinhold, New York, 1988, p. 317
Rabo JA, Zeolite Chemistry and Catalysis, American Chemical Society, New York, 1976, p. 225

[Related Articles]

[1] Kokotailo GT, Lawton SL, Olson DH, Nature, 272, 437 (1978)

[2] Yang BL, Kung HH, Environ. Sci. Technol., 28, 1561 (1994)

[3] Burke NR, Trimm DL, Howe R, Stud. Surf. Sci. Catal., 130, 1451 (2000)

[4] Czaplewski KF, Reitz TL, Kim YJ, Snurr RQ, Micropor. Macropor. Mater., 56, 55 (2002)

[5] Nho YC, Kim JI, Kang PH, J. Ind. Eng. Chem., 12(6), 888 (2006)

[6] Jeon JK, Park YK, Kim SS, Cho D, Kim JC, J. Ind. Eng. Chem., 13(5), 735 (2007)

[7] Kresge CT, Leonowicz ME, Roth WJ, Varyuli JC, Beck JS, Nature, 359, 710 (1992)

[8] Beck JS, J. Am. Chem. Soc., 114, 10834 (1992)

[9] Chen CY, Xiao SO, Davis ME, Micropor. Mater., 4, 1 (1995)

[10] CarValho WA, Varaldo PB, Wallau M, Schuchardt U, Zeolites, 18, 408 (1997)

[11] Zhibo Z, Nishio S, Morioka Y, Ueno A, Ohkita H, Tochihara Y, Mizushima T, Kakuta N, Catal. Today, 29(1-4), 303 (1996)

[12] Kang M, Hong WJ, Park MS, Appl. Catal. B: Environ., 53(3), 195 (2004)

[13] Szostak R, Molecular Sieves, Principle of Synthesis of Identification, Van Nostrand Reinhold, New York, 1988, p. 317

[14] Rabo JA, Zeolite Chemistry and Catalysis, American Chemical Society, New York, 1976, p. 225