Abstract
This study was carried out in order to investigate the suitability of ash ( Fraxinus angustifolia Vahl.), a native tree (species) in Turkey, for pulp and paper making. Four pulping methods, which included NSSC, cold soda, kraft and kraft + anthraquinone pulping processes, were used for this study. The test materials were supplied from two different stands found in Istanbul Bahcekoy region. When ash wood samples as ash 1 and ash 2 chemical contents were analyzed, the chemical components of ash 1 were higher than that of ash 2. Pulps and handsheets were obtained from ash 1 and were suitable for use in papermaking. These pulps were obtained by NSSC (neutral sulfite semi chemical pulping), cold soda, kraft and kraft + anthraquinone processes. Handsheets made from different pulping methods were compared with each other for strength and optical properties. Strength properties were found to be higher for kraft and kraft + anthraquinone processes, while optical properties were found to be higher for cold soda and NSSC processes.
Highlights
There is an increasing demand for paper and paperboard and their converted products in the pulp and paper industry
This study was carried out in order to investigate the suitability of ash (Fraxinus angustifolia Vahl.), a native tree in Turkey, for pulp and paper making
These pulps were obtained by NSSC, cold soda, kraft and kraft + anthraquinone processes
Summary
There is an increasing demand for paper and paperboard and their converted products in the pulp and paper industry. To meet this demand, it is important to investigate wood species, growing in Turkey’s ecological conditions and which are still available as sustainable and alternative pulp and paper raw material supplies. From approximately 20 million hectare, the woody area of Turkey contains 9 million hectare hardwood and 11 million hectare softwood. The important type of narrow-leaved ash, which is the widest woody area, is found in Turkey. Ash is the fastest-growing indigenous species except poplar and alder (Cicek et al, 2005). In this study, ash (Fraxinus angustifolia Vahl.) was examined with various pulping methods [NSSC (neutral sulfite semi chemical pulping), cold soda, kraft and kraft+AQ (kraft + antraquinone) pulping methods] to know if it would be suitable for pulp and paper production as a quality and high yield raw material
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