Alkali Pretreatment and Analysis Of Biomass Content Of Narlisaray Population and Vezir Type Cannabis Plant

Abstract

The cell wall of the hemp plant consists of cellulose, hemicellulose, and lignin cross-linked to these components. In such a structure, lignin is considered an undesirable byproduct in the production of textiles, paper, and biofuels from hemp. Therefore, the removal of lignin is essential for the industrial utilization of cellulose from hemp. In this study, lignin removal processes were conducted for the first time on the (native to Anatolia) Narlısaray population and the registered Vezir hemp. Alkaline (NaOH) treatment was preferred for pre-treatment due to its relatively low cost, lower energy requirements, and reduced risk factors. Structural changes before and after alkaline pre-treatment were compared using FT-IR spectra, SEM, and EDX analyses of the biomass. Examination of elemental trace values revealed that the O:C ratios of Narlısaray and Vezir fibers increased to 0.84 and 0.85, respectively. The increase in the O:C ratio indicated the removal of lignin, while the nearly identical ratios suggested that the lignin cross-linking energies in both local hemp fibers were almost the same. Additionally, SEM images provided clear information regarding the structural changes in Narlısaray and Vezir fibers before and after the lignin removal process.

Keywords

• Industrial hemp
• lignocellulosic biomass
• pretreatment

Supporting Institution

TUBİTAK

Project Number

1919B012107603

Thanks

This study was supported by the Scientific and Technical Research Council of Turkey (TUBITAK) within the scope of the 2209-A Student Project. I would like to thank Hümeyra AĞIR who contributed to the study.

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