Assessing the chemical composition of heavy components in bio-oils from the pyrolysis of cellulose, hemicellulose and lignin at slow and fast heating rates

Xiong, Zhe; Guo, Junhao; Chaiwat, Weerawut; Deng, Wei; Hu, Xun; Han, Hengda; Chen, Yuanjing; Xu, Kai; Su, Sheng; Wang, Lele

doi:10.1016/j.fuproc.2019.106299

Cited by 107 publications

(42 citation statements)

References 50 publications

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“…For example, less than 10% w/w of bio-chars increased at 220 C condition, but about 20% w/ w of those did at 300 C condition. According to previous pyrolysis studies, 33 bio-chars mostly came from the decomposition of lignin, while bio-oils were mainly from that of hemicellulose and cellulose. When tobacco residues were torreed at higher temperatures, hemicellulose almost completely decomposed, causing an increase of lignin content in the torreed biomass, which agreed with previous studies.…”

Section: Product Yields From Pyrolysismentioning

confidence: 99%

Bio-oils from vacuum ablative pyrolysis of torrefied tobacco residues

et al. 2020

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Section: Product Yields From Pyrolysismentioning

confidence: 99%

Bio-oils from vacuum ablative pyrolysis of torrefied tobacco residues

et al. 2020

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“…However, NMR and FTIR are capable mostly only of the identification of functional groups. On the other hand, compounds with high boiling points and molecular weights are difficult to be analyzed by GC or GC-MS [ 16 , 17 ]. Therefore, a further understanding of lignin mixtures requires not only advanced techniques, but also the combination of multiple techniques.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Lignin Compounds at the Molecular Level: Mass Spectrometry Analysis and Raw Data Processing

Zhang

et al. 2021

Molecules

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Lignin is the second most abundant natural biopolymer, which is a potential alternative to conventional fossil fuels. It is also a promising material for the recovery of valuable chemicals such as aromatic compounds as well as an important biomarker for terrestrial organic matter. Lignin is currently produced in large quantities as a by-product of chemical pulping and cellulosic ethanol processes. Consequently, analytical methods are required to assess the content of valuable chemicals contained in these complex lignin wastes. This review is devoted to the application of mass spectrometry, including data analysis strategies, for the elemental and structural elucidation of lignin products. We describe and critically evaluate how these methods have contributed to progress and trends in the utilization of lignin in chemical synthesis, materials, energy, and geochemistry.

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“…As a result, huge quantities of WTs are produced with tires constantly upgrading, causing serious pollutions to the environment since they cannot be naturally degraded [2,3]. Pyrolysis has been regarded as a promising technology to treat WTs as a result of it can be efficiently converted to high-valued oils by pyrolysis [4][5][6][7]. Unfortunately, large amounts of low-quality waste tire chars (WTCs) would generate via pyrolysis operation and their proportions commonly exceed 40 wt% compared with mass of WTs [8].…”

Section: Introductionmentioning

confidence: 99%

Waste Tire Heat Treatment to Prepare Sulfur Self-Doped Char: Operando Insight into Activation Mechanisms Based on the Char Structures Evolution

Ren

et al. 2021

Processes

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Waste tire (WT) can be heat-treated to be high-quality sulfur self-doped char via pyrolysis and K2FeO4-assisted activation processes. This work aimed at further studying the activation mechanisms based on the char structures evolution by operando experimental method. Activation treatment process (from 50 °C to 800 °C and then held for 3 h) was divided into six typical stages (S1–S6) and consisted of carbonization process (S1–S4) and effective activation process (S4–S6). During the carbonization process, the specific capacitance only increased from 0.2 F/g to 12.4 F/g, aromatic ring systems and alkyl-aryl C-C bonds generated, S 2p3/2 (sulphide bridge) was mainly gradually consumed. During the effective activation process, the specific capacitance hugely increased from 12.4 F/g to 112.5 F/g, aromatic ring systems and alkyl-aryl C-C bonds turned to ordered graphitic char. The pores massively generated from S4 to S5, while micropores partly formed to larger and mesopores+macropores fractionally converting to smaller from S5 to S6. Besides, both S 2p3/2 and S 2p5/2 (sulphone bridge) were enriched after S5. Furthermore, the key structural parameters for huge improvement of specific capacitance were found and it further revealed that mesopores+macropores possessed stronger promotion effect than micropores and S 2p3/2 was more beneficial than S 2p5/2.

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Assessing the chemical composition of heavy components in bio-oils from the pyrolysis of cellulose, hemicellulose and lignin at slow and fast heating rates

Cited by 107 publications

References 50 publications

Bio-oils from vacuum ablative pyrolysis of torrefied tobacco residues

Bio-oils from vacuum ablative pyrolysis of torrefied tobacco residues

Characterization of Lignin Compounds at the Molecular Level: Mass Spectrometry Analysis and Raw Data Processing

Waste Tire Heat Treatment to Prepare Sulfur Self-Doped Char: Operando Insight into Activation Mechanisms Based on the Char Structures Evolution

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