Pinewood pyrolysis occurs at lower temperatures following treatment with choline-amino acid ionic liquids. (15th January 2019)

• Record Type: Journal Article
• Authors: Brunner, Manuel; Li, Hua; Zhang, Zhezi; Zhang, Dongke; Atkin, Rob
• Is Part Of: Fuel. Volume 236(2019)
• Page Start: 306
• Page End: 312
• Publication Date: 2019-01-15
• Subjects: Pinewood -- Ionic liquids -- Decomposition -- TGA -- SEM; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2018.09.004
• Languages: English
• ISSNs: 0016-2361

Abstract

Graphical abstract: Highlights: Interactions between choline-amino acid ionic liquids and pinewood has been probed. Cholinium arginate solubilises the greatest mass of pinewood at 19%. Cholinium glycinate solubilises only 9% of the pinewood, but leads to decomposition at significantly lower temperatures. Abstract: Pinewoods are the dominant species in Australian softwood plantations and an important source of renewable lignocellulosic biomass. This work examines interactions between cholinium amino acid (Ch[AA]) ionic liquid (IL) – Water mixtures and pinewood. The Ch[AA] ILs employed were cholinium arginate (Ch[Arg]), cholinium glycinate (Ch[Gly]), and cholinium aspartate (Ch[Asp]), with water contents between 32 and 42 wt%. Pinewood and Ch[AA] ILs were mixed at 90 °C for all samples, and also 120 °C for Ch[Arg], as it dissolved the most biomass at 90 °C. Thermogravimetric analysis (TGA), scanning electron microscopy (SEM), x-ray diffraction (XRD), and compositional (CHNS) analysis were performed on the raw and treated biomass samples to reveal the changes in physical and chemical properties. While Ch[Arg] solubilised the greatest mass of biomass during treatment, the most pronounced changes in decomposition properties was obtained using Ch[Gly]. The TGA analysis revealed the maximum in the derivative weight loss data shifted to lower temperatures by 29 °C.