The Effect of Liquid Nitrogen Pretreatment And Borax Application on The Combustion Properties of Scots Pine Wood Material

Öz

In this study, the effects of liquid nitrogen pretreatment on the combustion properties of impregnated Scots pine (Pinus sylvestris L.) wood were investigated. For this purpose, the following sample groups were prepared: Unpretreated and unimpregnated control samples, impregnated samples, liquid nitrogen pretreated samples, impregnated and liquid nitrogen pretreated samples. The combustion test was carried out according to ASTM-E 69 standard. Mass loss, gas release (CO ppm, NO ppm, % O2), flue and combustion temperature differences were determined for every 30 seconds during combustion. The data were analyzed and the effectiveness of different applications was discussed. As a result, it was seen that liquid nitrogen pretreatment increased the borax retention provided in the wood material by nearly 30%. This increase decreased the mass loss by 7% at the end of flaming combustion and by 2% at the end of combustion. Here, the increase in the amount of protective and fire retardant substances held in the wood material has a positive effect on both the impregnation quality and the service life of the wood material.

Anahtar Kelimeler

• Liquid nitrogen
• Borax
• Combustion
• Scots pine

Sıvı Azot Ön İşlemi ve Boraks Uygulamasının Sarıçam Ağaç Malzemenin Yanma Özelliklerine Etkisi

Öz

Bu çalışmada, sıvı azot ön işlemi uygulanan emprenyeli sarıçam (Pinus sylvestris L.) ağaç malzemenin yanma özellikleri üzerindeki etkileri araştırılmıştır. Bu amaç doğrultusunda şu numune grupları hazırlanmıştır: Ön işlem görmemiş emprenyesiz kontrol numuneleri, emprenye işlemi uygulanmış numuneler, sıvı azot ön işlemi uygulanmış numuneler, emprenye işlemi ve sıvı azot ön işlemi uygulanmış numuneler. Yanma testi ASTM-E 69 standardına göre gerçekleştirilmiştir. Kütle kaybı, gazların salınımı (CO ppm, NO ppm, % O2), baca ve yanma sıcaklığı farkları yanma sırasında her 30 saniye için belirlenmiştir. Veriler analiz edilmiş ve farklı uygulamaların etkinliği tartışılmıştır. Sonuç olarak sıvı azot ön işlemi ile muamele etmenin, ağaç malzemede sağlanan boraks retensiyonunu %30’ a yakın arttırdığı görülmüştür. Bu artış, kütle kaybını alevli yanma sonunda %7, yanma sonunda %2 azaltmıştır. Burada ağaç malzemenin içerisinde tutulan koruyucu ve yangın geciktirici madde miktarının artması hem emprenye kalitesini hem de ağaç malzemenin kullanım ömrünü pozitif etkilemiştir.

Anahtar Kelimeler

• Sıvı azot
• Boraks
• Yanma
• Sarıçam

Kaynakça

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