Fındık Kabuğunun Torrefaksiyon ve Yanma davranışının İncelenmesi

Year 2022, , 51 - 65, 15.06.2022

Bedriye Aydemir Melek Yılgın

https://doi.org/10.31466/kfbd.974829

Cited By: 2

Abstract

Torrefaksiyon, günümüzün güç sistemlerine dahil edilebilecek kömür benzeri katılar elde etmek için umut verici bir tekniktir. Bu çalışmada, fındık kabuğunun tel örgü sepetli dikey bir fırın ve gerekli ekipmanlar kullanılarak torrefaksiyonu ve yanma davranışı incelenmiştir. Torrefaksiyon deneyleri, sepet içinde azot akışı altında ve sırasıyla hafif, orta ve şiddetli koşullara karşılık gelen 200, 240 ve 280 oC sıcaklıklarda poli-parçacık yatağı olarak yapılmıştır. Bununla birlikte, yanma deneyleri, 550, 650 ve 750 oC sıcaklıklarda doğal konveksiyon hava akımı altında yanan tek bir ham veya torrefiye peletin kütlesi kaydedilerek gerçekleştirilmiştir. Katı ürün veriminin torrefaksiyon sıcaklığı ile azaldığı, katı ürünün sabit karbon ve üst ısı değerinin (ÜID) arttığı görüldü. Torrefiye kabukların uçucu tutuşma süreleri nem içeriklerinden etkilenmiştir. Bu etki, peletlerin daha hızlı ısıtılması nedeniyle artan sıcaklıklarla azaldı. Torrefiye peletlerin karbon yanma hızları genellikle ham peletlerinkinden daha düşüktü ve yanma sıcaklığının yanı sıra torrefaksiyon şiddeti ile azaldı.

Keywords

Fındık kabuğu, Torrefaksiyon, Yakma, Sabit yatak

Supporting Institution

Fırat Üniversitesi

Project Number

MF.19.16

Thanks

Fırat Üniversitesi Bilimsel Araştırma Projeleri Birimi tarafından Proje No: MF.19.16 kapsamında bu çalışmaya verdikleri destek için teşekkür ederiz.

Investigation of Torrefaction and Combustion Behavior of Hazelnut Shell

Abstract

Torrefaction is a promising technique to obtain coal-like solids which can be incorporated into today’s power systems. In this study, torrefaction of hazelnut shell and their combustion behaviour were investigated using a vertical furnace with a wire mesh basket and necessary equipments. Torrefaction experiments were made as a poly-particles bed in the basket under nitrogen flow and at 200, 240 and 280 oC temperatures corresponding to light, mild and severe conditions, respectively. It was observed that the solid product yield decreased with the torrefaction temperature and the fixed carbon and HHV of the solid product increased. Combustion experiments, however, were carried out by recording mass of single raw or torrefied burning pellet under natural convection airflow at 550, 650 and 750 oC temperatures. Volatiles ignition times of torrefied shells were affected by their moisture contents. This effect lessened with increasing temperatures due to faster heating of pellets. Torrefied pellets of carbon combustion rates were generally lower than those of raw pellets and decreased with combustion temperature as well as torrefaction severity.

Keywords

Hazelnut Shell, Torrefaction, Combustion, Fixed bed

Project Number

MF.19.16

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