Process analysis of the waste bamboo by using polyethylene glycol solvent liquefaction

Wang, Qingyue; Chen, Q.; Qiao, Qiquan; Sugiyama, K.

doi:10.2495/sdp-v9-n5-647-657

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…The bamboo samples, a mixed solution (1/9 proportion of glycerin to polyethylene glycol) and the catalyst (H2SO4) were measured as they were needed, respectively and then mixed in a 300 mL three-neck reaction flask equipped with a stirrer and a reflux condenser [6]. Then, the reaction flask was immersed in a preheated oil bath.…”

Section: Liquefaction Experiments Of Bamboo Samplesmentioning

confidence: 99%

Characterization of liquefied waste bamboo and white-rotted wood

Wang¹,

Takahashi²,

Takahashi³

et al. 2015

WIT Transactions on Ecology and the Environment

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Due to the depletion of fossil fuel resources, the utilization of sustainable and renewable biomass is studied in various fields. Wood liquefaction is one of the applicable methods for material utilization of waste biomass. In this study, valueless waste bamboo and white-rotted wood were liquefied for reuse as an alternative plastic material. The waste bamboo samples were liquefied in polyethylene glycol (PEG) with sulfuric acid as a catalyst. Then, the molecular weight distribution of the contents of the liquefied bamboo samples was analyzed using gel permeation chromatography (GPC) and the residue mass was also measured in order to investigate the residue contents. At the same time, the whiterotted woody samples were liquefied in phenol with sulfuric acid as a catalyst. Rotted woody samples and liquefied contents were analyzed with X-ray diffraction (XRD) and determined by GPC, and the residue contents were also compared with the results of non-rotted woody samples. The waste bamboo samples were liquefied effectively under the reaction conditions of a temperature of 150°C, the acidic catalyst of 12% H2SO4 and 1/4 proportion of bamboo samples to solvent, respectively. The residue contents were the lowest at a reaction time of 30 minutes, and after that they were increased a reaction progressed. With the help of GPC analysis, it was found that the peaks of the contents of the liquefied bamboo samples at the initial reaction stage appeared at a high molecular weight distribution, which disappeared when the reaction progressed. When the white-rotted woody samples were liquefied, due to the low powder density, the samples did not perform well at the initial reaction stage. From GPC analysis of the liquefied contents, the liquefied tendency and the residue

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Section: Liquefaction Experiments Of Bamboo Samplesmentioning

confidence: 99%

Characterization of liquefied waste bamboo and white-rotted wood

Wang¹,

Takahashi²,

Takahashi³

et al. 2015

WIT Transactions on Ecology and the Environment

Self Cite

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“…These may be due to the decomposition of a large amount of amorphous structure, especially for amylose [29][30]. Whilst much crystalline region were destroyed within 30 min under high temperature of 180 °C according to the peak at 2θ value of 22.8 ° with relatively low intensity.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Effects of Liquefaction Temperature and Time on Characterization of Liquefied Oil Palm Trunk Residue in the Presence of Polyhydric Alcohols

Choowang¹,

Lin²,

Zhao³

2018

Preprint

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Resides derived from liquefaction of oil palm trunk in the presence of polyhydric alcohol with different liquefaction temperature and time were characterized to provide a new approach to understand some fundamental aspects of the liquefaction reaction. Higher temperature and longer reaction time resulted in lower residue content, indicating more decomposition of components of oil palm trunk. The amorphous polymer comprised of lignin, hemicellulose, starch, and cellulose with non-crystalline structure are firstly degraded at low liquefaction temperature, followed by the decomposition of crystalline region of cellulose. Although it was relatively difficult to destroy the ordered structure of cellulose, most of them could be liquefied via prolonging reaction time or enhancing reaction temperature. Nevertheless, it was found that re-condensation of liquefied products occurred during the liquefaction process when higher temperature of 180 oC was used after 60 min, leading to the gradual increase of residue content with increase of reaction time.

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“…For instance, research on rice straw [3], food waste [4], jatropha biomass [5], and forest residue was investigated. In our laboratory, previously, the utilization of cotton stalks [6] and other biomass resources was researched [7,8]. With this background, the current study focuses on driftwood as an untapped biomass resource [9,10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Polyurethane Foam Derived from the Liquefied Driftwood Approaching for Untapped Biomass

Masuda,

Nagao,

Wang

et al. 2023

Processes

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Nowadays, climate change has become a serious concern, and more attention has been drawn to utilizing biomass sources instead of fossil sources and how petroleum chemical plastics should be reduced or replaced with bio-based materials. In this study, the optimized condition of liquefaction of driftwood was examined. There was a concern that driftwood might have some decay and chemical change. However, according to the Organic Micro Element Analyzer (CHN analyzer) test and Klason lignin and Wise methods, the results proved that lignin content (37.5%), holocellulose content (66.9%), and CHN compositions were very similar to regular wood. The lowest residue content of bio-polyols was produced using liquefaction conditions of 150 °C, reaction time of 180 min, catalyst content of 10%w/w, and 12.5%w/w driftwood loading. Polyurethane foam (PUF) derived from the liquefaction of driftwood and bio-based cyanate was prepared. The PUF prepared from the liquefaction of the driftwood exhibited slightly decreased thermal durability but was superior in terms of 3-time faster biodegradation and 2.8-time increased water adsorption rate compared to pure petroleum-based PUF. As a result, it was shown that driftwood can be identified as a biomass resource for biodegradable PUF.

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Process analysis of the waste bamboo by using polyethylene glycol solvent liquefaction

Cited by 6 publications

References 28 publications

Characterization of liquefied waste bamboo and white-rotted wood

Characterization of liquefied waste bamboo and white-rotted wood

Effects of Liquefaction Temperature and Time on Characterization of Liquefied Oil Palm Trunk Residue in the Presence of Polyhydric Alcohols

Evaluation of Polyurethane Foam Derived from the Liquefied Driftwood Approaching for Untapped Biomass

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