Thermal treatment of various samples of low-molecular-weight polyethylene – a by-product of polyethylene production

Ochilov, Golibjon, Abdumalikov , Abdulaziz, Ummatov, Obidjon, Mamajonov, Bakhodirjon, Esonkulova, Nazirakhon

Наманган муҳандислик­технология институти илмий­техника журнали · 2025-yil

Annotatsiya

A comparative thermal analysis was conducted on three industrial samples of low-molecular-weight polyethylene (LMWPE)—a by-product of polyethylene production—with the aim of determining optimal conditions for carbonization and subsequent activation. The study employed TGA/DSC methods (Ar, 10 °C/min) and laboratory-scale carbonization in a flow-through argon reactor, with gas sampling at specific temperature “windows” followed by GC analysis (TCD + FID). The results indicate that melting occurs in the range of approximately 30–150 °C with less than 1% mass loss; thermal degradation begins at 300–400 °C, with major decomposition occurring between 420–520 °C. The residual mass at 1000 °C was approximately 33% (LMWPE-1), 38% (LMWPE-2), and 53% (LMWPE-3), indicating differences in molecular architecture and suggesting LMWPE-3 as the preferred precursor in terms of carbon yield. Gas evolution trends showed a transition from C₃–C₁₇ olefins/paraffins (300–520 °C) to dominant H₂ and CH₄ evolution at higher temperatures, accompanied by increased aromaticity of the solid residue. It is recommended to limit the upper carbonization temperature to ~500 °C to avoid melting and coalescence, and to employ the 750–820 °C range as the optimal “window” for high-temperature treatment relevant to subsequent alkaline activation.

Maqola ma’lumotlari
MualliflarOchilov, Golibjon, Abdumalikov , Abdulaziz, Ummatov, Obidjon, Mamajonov, Bakhodirjon, Esonkulova, Nazirakhon
JurnalНаманган муҳандислик­технология институти илмий­техника журнали
NashriyotНаманган муҳандислик-технология институти
ISSN2181-8622, 1682-8658
Nashr sanasi2025-09-30
Jild10
Son3
Betlar145-152
TilIngliz
DOI10.61151/stjniet.v10i3.868
Indeksga qo‘shilgan2026-08-26

DOI: 10.61151/stjniet.v10i3.868 · Maqolaning asl sahifasi

Kalit so‘zlar

low-molecular-weight polyethylene (LMWPE), pyrolysis, TGA/DSC, carbonization, gas-phase products, carbon residue, activated carbons

Iqtibos keltirish

APAOchilov, Golibjon, Abdumalikov , Abdulaziz, Ummatov, Obidjon, Mamajonov, Bakhodirjon, & Esonkulova, Nazirakhon (2025). THERMAL TREATMENT OF VARIOUS SAMPLES OF LOW-MOLECULAR-WEIGHT POLYETHYLENE – A BY-PRODUCT OF POLYETHYLENE PRODUCTION. Наманган муҳандислик­технология институти илмий­техника журнали, 10(3), 145-152. https://doi.org/10.61151/stjniet.v10i3.868
GOST (OAK)Ochilov, Golibjon va b. THERMAL TREATMENT OF VARIOUS SAMPLES OF LOW-MOLECULAR-WEIGHT POLYETHYLENE – A BY-PRODUCT OF POLYETHYLENE PRODUCTION // Наманган муҳандислик­технология институти илмий­техника журнали. – 2025. – T. 10, № 3. – P. 145-152. – DOI: 10.61151/stjniet.v10i3.868.
MLAOchilov, Golibjon, Abdumalikov , Abdulaziz, Ummatov, Obidjon, Mamajonov, Bakhodirjon, and Esonkulova, Nazirakhon. “THERMAL TREATMENT OF VARIOUS SAMPLES OF LOW-MOLECULAR-WEIGHT POLYETHYLENE – A BY-PRODUCT OF POLYETHYLENE PRODUCTION.” Наманган муҳандислик­технология институти илмий­техника журнали, 10(3), 145-152, 2025. https://doi.org/10.61151/stjniet.v10i3.868
ChicagoOchilov, Golibjon, Abdumalikov , Abdulaziz, Ummatov, Obidjon, Mamajonov, Bakhodirjon, and Esonkulova, Nazirakhon. “THERMAL TREATMENT OF VARIOUS SAMPLES OF LOW-MOLECULAR-WEIGHT POLYETHYLENE – A BY-PRODUCT OF POLYETHYLENE PRODUCTION.” Наманган муҳандислик­технология институти илмий­техника журнали, 10(3), 145-152 (2025). https://doi.org/10.61151/stjniet.v10i3.868
HarvardOchilov, Golibjon, Abdumalikov , Abdulaziz, Ummatov, Obidjon, Mamajonov, Bakhodirjon, and Esonkulova, Nazirakhon (2025) ‘THERMAL TREATMENT OF VARIOUS SAMPLES OF LOW-MOLECULAR-WEIGHT POLYETHYLENE – A BY-PRODUCT OF POLYETHYLENE PRODUCTION’, Наманган муҳандислик­технология институти илмий­техника журнали, 10(3), 145-152. https://doi.org/10.61151/stjniet.v10i3.868
BibTeX
@article{ochilovgolibjon2025,
  title = {THERMAL TREATMENT OF VARIOUS SAMPLES OF LOW-MOLECULAR-WEIGHT POLYETHYLENE – A BY-PRODUCT OF POLYETHYLENE PRODUCTION},
  author = {Ochilov, Golibjon and Abdumalikov , Abdulaziz and Ummatov, Obidjon and Mamajonov, Bakhodirjon and Esonkulova, Nazirakhon},
  journal = {Наманган муҳандислик­технология институти илмий­техника журнали},
  year = {2025},
  volume = {10},
  number = {3},
  pages = {145-152},
  doi = {10.61151/stjniet.v10i3.868},
  url = {https://doi.org/10.61151/stjniet.v10i3.868}
}

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