Effects of Different Parameters on Pyrolytic Liquid Product of Waste LDPE and C/LDPE Packages

Abstract

This study is about the thermal pyrolysis of low-density polyethylene (LDPE), which has the highest waste volume in the polyolefins plastic class, and aluminum-containing composites (C/LDPE), which are frequently used in packaging, to recover value-added products and then characterize the products obtained. LDPE and C/LDPE wastes were examined by proximate analysis, elemental analysis and TGA, and then pyrolyzed in a fixed bed reactor at different temperatures (400-600-800 ℃) and different heating rates (5-10-20 ℃/min). Afterwards, the wastes were pyrolyzed at 600 °C and 20 °C/min heating rate with zeolite catalysis and the effect of the catalyst on the liquid product was evaluated. GC-MS, FT-IR and 1H-NMR analyzes of the pyrolytic liquid products and commercial waxes were performed to determine the potential of the obtained liquid product to be used as a wax. According to the results, the product obtained from waste C/LDPE is similar to commercial heavy wax.

Keywords

• LDPE
• C/LDPE
• catalyst
• pyrolysis
• wax

LDPE ve C/LDPE Ambalaj Atıklarının Pirolizi ve Farklı Parametrelerin Sıvı Ürüne Etkisi

Abstract

Bu çalışma; poliolefin plastik sınıfında en fazla atık hacmine sahip olan düşük yoğunluklu polietilen (LDPE) ve ambalajlamada sıkça kullanılan alüminyum içerikli kompozitlerinin (C/LDPE), katma değerli ürünler elde etmek için pirolizi ve elde edilen ürünlerin karakterizasyonunu içermektedir. LDPE ve C/LDPE atıkları, kısa analiz, elementel analiz ve TGA ile incelenmiş; ardından farklı sıcaklık (400-600-800 ℃) ve ısıtma hızlarında (5-10-20 ℃/dk) sabit yataklı reaktörde piroliz edilmiştir. Sonrasında atıklar, zeolit katalizörlüğünde 600 °C sıcaklık ve 20 °C/dk ısıtma hızında piroliz edilerek, katalizörün sıvı ürün üzerindeki etkisi değerlendirilmiştir. Elde edilen sıvı ürünün vaks olarak değerlendirilme potansiyelini belirlemek için, sıvı ürünlerin ve temin edilen ticari vaksların GC-MS, FT-IR ve 1H-NMR analizleri yapılmıştır. Sonuçlara göre, atık C/LDPE’den elde edilen ürün ticari ‘heavy wax’ ile benzerlik göstermektedir.

Keywords

• LDPE
• C/LDPE
• katalizör
• piroliz
• vaks

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