Catalytic Hydrothermal Liquefaction of Waste Furniture Sawdust to Bio-oil. Issue 2 (2nd April 2016)

• Record Type: Journal Article
• Authors: Jindal, M.K.; Jha, M.K.
• Is Part Of: Indian chemical engineer. Volume 58:Issue 2(2016)
• Page Start: 157
• Page End: 171
• Publication Date: 2016-04-02
• Subjects: Hydrothermal liquefaction -- Sawdust -- Bio-oil -- Alkalis -- Solid residue; Chemical engineering -- Research -- India -- Periodicals; 660
• DOI: 10.1080/00194506.2015.1006145
• Languages: English
• ISSNs: 0019-4506

Abstract

Abstract: The objective of present study is to investigate the effect of alkalis (NaOH, Na2 CO3, KOH and K2 CO3 ) on hydrothermal liquefaction of waste furniture sawdust (mixture of different types of waste woods) under sub-critical water conditions in a batch reactor operating at 280°C for 15 min. The liquefaction products were analysed using Fourier transform infrared spectroscopy, elemental composition, higher heating value and gas chromatography-mass spectrometry (GC-MS). The highest total bio-oil yield (34.9 wt%) and lowest solid residue yield (6.8 wt%) was obtained in the presence of 1.0 M K2 CO3 . Reactivity order for alkalis based on biomass conversion and liquid yield was found to be K2 CO3 > KOH > Na2 CO3 > NaOH. The experimental results showed that the bio-oils produced were enriched in carbon and hydrogen and had reduced level of oxygen compared with original sawdust. The GC-MS analysis showed that light bio-oils and heavy bio-oils comprised a complex mixture of organic compounds, which mainly include phenols and their derivatives.