Co-pyrolysis of Polyethylene and Sawmills Powder: Influence of Polyethylene on Pyrolysis Product Value

Öz

The aim of this study was to investigate the effect on plastics during co-pyrolysis with biomass. Pyrolysis of sawmills powders (SP), polyethylene (PE) and their mixtures was carried out in a semi-batch reactor with varying temperatures at 550 °C and 600 °C. This work is a preliminary study for the development of a co-pyrolysis process of plastic wastes with biomass with the aim to produce an alternative liquid fuel for industrial use. Experiments were carried out with plastics and biomass to highlight the interactions occurring between a plastic and a biomass during their co-pyrolysis. It appears that the main decomposition event of each component takes place at higher temperatures when the components are mixed than when they are alone, possibly because the two components stabilize each other during their co-pyrolysis. These interactions depend on the nature of the plastics and the biomass. In addition, co-pyrolysis experiments were led in a lab-scale reactor using a mixture of plastic wastes and biomass. The influence of some key operating parameters on the outcome of the process was analysed. Hence, this co-pyrolysis process could be economically viable, provided heat losses are addressed carefully when designing an industrial reactor. The maximum liquid product yields for the pyrolysis of SP and PE obtained were 35,17% and 61,00%, respectively, whereas the maximum liquid product yield for SP/PE co- pyrolysis was 46,05% at 550 °C with 1:1 blend ratio.

Anahtar Kelimeler

• Alternative Energy,Elemental Analysis,Pyrolysis,Waste Reduction

Polietilen ve Kereste Tozlarının Ko-pirolizi: Piroliz Ürün Değeri Üzerinde Polietilenin Etkisi

Öz

Bu çalışmanın amacı biyokütlenin kopiroliz sırasında plastikler üzerindeki etkisini araştırmaktır. Kereste tozlarının (SP), polietilenin (PE) ve bunların karışımlarının pirolizi, 550 °C ve 600 °C değişen sıcaklıklarda yarı-kesikli bir reaktörde gerçekleştirildi. Bu çalışma, endüstriyel kullanım için alternatif bir sıvı yakıt üretmek amacıyla, biyolojik kütle ile plastik atıkların kopiroliz işlemini geliştirilmesi için bir ön çalışmadır. Bileşenlerin kopirolizi sırasında bir plastik ile bir biyokütle arasında meydana gelen etkileşimleri vurgulamak için, plastikler ve biyokütle ile deneyler gerçekleştirildi. Her bir bileşenin ana parçalanma olayı, bileşenlerin beraber olduğunda, yalnız olmalarına göre daha yüksek sıcaklıklarda gerçekleştiği görüldü ve bunun nedeninin iki bileşen kopiroliz sırasında birbirlerini dengelediği düşünüldü. Bu etkileşimlerin plastiklere ve biyokütleye bağlı olduğu çıkarımı yapıldı. Ayrıca, biyokütle ve plastik atıkların karışımı kullanılarak laboratuvar ölçekli bir reaktörde piroliz deneyleri yapıldı. Bazı önemli işletme parametrelerinin sürecin sonucu üzerindeki etkisi de analiz edildi. Bu nedenle, bu kopiroliz işleminin, bir endüstriyel reaktör tasarlanırken ısı kayıplarına dikkat edilmesi koşuluyla ekonomik açıdan uygulanabilir olduğu görüldü. Elde edilen SP ve PE'nin pirolizi için maksimum sıvı ürün verimi sırasıyla % 35,17 ve % 61,00 iken, SP ve PE ortak pirolizi için maksimum sıvı ürün verimi 1:1 karışım oranında ve 550 °C'de % 46,05 sonucuna ulaşıldı. 

Anahtar Kelimeler

• Alternatif Enerji,Element Analizi,Piroliz,Atık Azaltma

Kaynakça

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