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@article{ART003185727},
author={Dipali P. Upare and Chul Wee Lee and Don Keun Lee and Young Soo Kang},
title={Effect of acidity of solid acid catalysts during non-oxidative thermal decomposition of LDPE},
journal={Carbon Letters},
issn={1976-4251},
year={2025},
volume={35},
number={1},
pages={277-285},
doi={10.1007/s42823-024-00789-z}

TY - JOUR
AU - Dipali P. Upare
AU - Chul Wee Lee
AU - Don Keun Lee
AU - Young Soo Kang
TI - Effect of acidity of solid acid catalysts during non-oxidative thermal decomposition of LDPE
JO - Carbon Letters
PY - 2025
VL - 35
IS - 1
PB - Korean Carbon Society
SP - 277
EP - 285
SN - 1976-4251
AB - Thermal decomposition of low-density polyethylene (LDPE) was monitored by thermogravimetry under N2 atmosphere in the presence of solid acid catalysts such as alumina (α-Al2O3, γ-Al2O3), crystalline silica-alumina (SA, molar ratio of Si/Al = 0.19) and amorphous silica-alumina catalysts (ASA, molar ratio of Si/Al = 4.9). Crystal structure and surface area of solid acid catalysts were measured by XRD and BET, respectively. The strength and distribution of acid sites of solid acid catalysts were estimated by NH3-TPD. It was observed that total acidity strength is in the order of ASA (1.77 μmmol NH3/g) > AS (1.42 μmol NH3/g) > γ-Al2O3 (1.06 μmol NH3/g) > α-Al2O3 (0.06 μmol NH3/g). Thermal degradation behavior of LDPE with and without solid acid catalyst was monitored by TGA, where heating rates (β) of 5, 10, and 20 °C/min were employed under an inert atmosphere, and their activation energies (Ea), onset temperatures (Tinitial), decomposition temperatures (Tdecomp) were calculated and compared. The activation energy (Ea) was evaluated using the Coats-Redfern method. Solid acid catalysts with stronger acidity and higher surface area showed a decrease in activation energy and onset temperature. Activation energy of LDPE over ASA catalyst is decreased to 97.3 kJ/mol from thermal decomposition of LDPE without catalyst of 117.2 kJ/mol under heating rate of 10 °C/min. The isothermal decomposition of LDPE was monitored at 300 °C for 3 h with a heating rate of 10 °C/min, where 13.1% and 24.2% wt. loss were observed over SA and ASA, respectively, while only 0.7% wt. loss was observed for LDPE without a solid acid catalyst.
KW - Solid acid catalysts;Thermal degradation;LDPE;TGA;Activation energy (Ea)
DO - 10.1007/s42823-024-00789-z
ER -

Dipali P. Upare, Chul Wee Lee, Don Keun Lee and Young Soo Kang. (2025). Effect of acidity of solid acid catalysts during non-oxidative thermal decomposition of LDPE. Carbon Letters, 35(1), 277-285.

Dipali P. Upare, Chul Wee Lee, Don Keun Lee and Young Soo Kang. 2025, "Effect of acidity of solid acid catalysts during non-oxidative thermal decomposition of LDPE", Carbon Letters, vol.35, no.1 pp.277-285. Available from: doi:10.1007/s42823-024-00789-z

Dipali P. Upare, Chul Wee Lee, Don Keun Lee, Young Soo Kang "Effect of acidity of solid acid catalysts during non-oxidative thermal decomposition of LDPE" Carbon Letters 35.1 pp.277-285 (2025) : 277.

Dipali P. Upare, Chul Wee Lee, Don Keun Lee, Young Soo Kang. Effect of acidity of solid acid catalysts during non-oxidative thermal decomposition of LDPE. 2025; 35(1), 277-285. Available from: doi:10.1007/s42823-024-00789-z

Dipali P. Upare, Chul Wee Lee, Don Keun Lee and Young Soo Kang. "Effect of acidity of solid acid catalysts during non-oxidative thermal decomposition of LDPE" Carbon Letters 35, no.1 (2025) : 277-285.doi: 10.1007/s42823-024-00789-z

Dipali P. Upare; Chul Wee Lee; Don Keun Lee; Young Soo Kang. Effect of acidity of solid acid catalysts during non-oxidative thermal decomposition of LDPE. Carbon Letters, 35(1), 277-285. doi: 10.1007/s42823-024-00789-z

Dipali P. Upare; Chul Wee Lee; Don Keun Lee; Young Soo Kang. Effect of acidity of solid acid catalysts during non-oxidative thermal decomposition of LDPE. Carbon Letters. 2025; 35(1) 277-285. doi: 10.1007/s42823-024-00789-z

Dipali P. Upare, Chul Wee Lee, Don Keun Lee, Young Soo Kang. Effect of acidity of solid acid catalysts during non-oxidative thermal decomposition of LDPE. 2025; 35(1), 277-285. Available from: doi:10.1007/s42823-024-00789-z

Dipali P. Upare, Chul Wee Lee, Don Keun Lee and Young Soo Kang. "Effect of acidity of solid acid catalysts during non-oxidative thermal decomposition of LDPE" Carbon Letters 35, no.1 (2025) : 277-285.doi: 10.1007/s42823-024-00789-z