Thermal Characteristics and Kinetics of Waste <i>Camellia oleifera</i> Shells by TG–GC/MS

Yang, Zongling; Fu, Ling; Fan, Fang Yu

doi:10.1021/acsomega.9b01013

Cited by 14 publications

(5 citation statements)

References 36 publications

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“…In addition, the weight loss of MIPW near 380 °C also includes the dehydration of silane alcohol groups in amorphous silica in MIPW, which changes the structure of silicon dioxide and makes the modified silica particles more prone to water loss at 500 °C to 600 °C, forming a more obvious weight loss peak [12]. Compared with MIPW, the DTG curve of COS has more obvious weight loss peaks around 250, 300 and 360 • C, a result similar to the data of Yang et al (10 • C/min) [13].…”

Section: Thermogravimetric Analysis Of Raw Materialssupporting

confidence: 78%

Study on Nitrogen Migration during Co-Pyrolysis of Melamine-Impregnated Paper Waste and Camellia Oleifera Shell

Zhuo,

Li,

Liu

et al. 2024

Sustainability

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Melamine-impregnated paper waste (MIPW) is an unavoidable byproduct of the melamine-impregnated paper production process, and it must be urgently disposed. In this paper, due to its high N content, MIPW was used as a N source to co-pyrolyze with camellia oleifera shell (COS). By changing the proportion of MIPW in the raw materials, the migration path of the N was studied during the co-pyrolysis process. X-ray photoelectron spectroscopy (XPS), elemental analysis (EA), total nitrogen analysis (TN) and ultraviolet spectrophotometry were used to determine the content and the types of N-containing components in raw materials and products. The results showed that during the co-pyrolysis process, the N in MIPW and COS would be converted into different types of N-containing components, and the proportion of MIPW in raw materials directly impacts the product distribution and the N migration path. With the increase in the proportion of MIPW from 10 to 50 wt.% (daf, mass ratio), the proportion of N in raw materials that migrated into the solid phase decreased from 27.58 to 16.31 wt.%, while that which migrated to the gas and liquid phases increased from 24.92 and 47.50 wt.% to 25.97 and 57.72 wt.%, respectively. The proportions of N in the raw materials that changed into pyridinic-N, pyrrolic-N and graphitic-N in the solid phase and N2-N in the gas phase were decreased. The proportions of NH3-N and HCN-N in the gas phase and NH3-N and organic-N in the liquid phase were increased. Moreover, synergies were observed during the co-pyrolysis process, which affected the N migration path in the raw material. This study will provide policy directions and theoretical support for the comprehensive utilization of MIPW and COS.

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Section: Thermogravimetric Analysis Of Raw Materialssupporting

confidence: 78%

Study on Nitrogen Migration during Co-Pyrolysis of Melamine-Impregnated Paper Waste and Camellia Oleifera Shell

Zhuo,

Li,

Liu

et al. 2024

Sustainability

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“…The molecular model of alcohol O–H and phenol O–H mainly uses the actual extracts existing in coals. According to the literature, − 1-undecanol, 2-methyl-3-biphenylmethanol, 2-undecanol, 1,2,3,4-tetrahydro-4-methylphenanthrene-1-ol, 2,4-dimethyl-2-pentanol, phenol, 2-naphthol, 2-hydroxyanthracene, pyren-10-ol, 1,2-benzopyrene-4-ol, and 2,4-di- tert -butylphenol are selected.…”

Section: Methodsmentioning

confidence: 99%

Infrared Spectrum Characteristics and Quantification of OH Groups in Coal

et al. 2023

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The KBr pellet press method for detecting the infrared spectrum of coal is one of the commonly used methods for analyzing the types and content of functional groups in coal. However, KBr crystalline water or moisture has a significant impact on the peak position, peak shape, and peak area of the organic O–H based stretching vibration wave in coal. In this paper, the theoretical characteristics of infrared spectra of phenols and alcohols have been simulated and analyzed using the Gaussian 16 series of programs. Four infrared spectral analysis techniques, in situ infrared, KBr pellet press, dry KBr pellet press, and paste methods, have been used to detect the infrared spectra of coal. The results show that the stretching vibration peaks of free O–H radicals without hydrogen bonding are located between 3700 and 3600 cm–1. After the O–H form hydrogen bonds with each other, the O–H stretching vibration frequency moves toward the low frequency direction, and the lower the wavenumber, the more O–H content. The conventional KBr gasket manufacturing process will absorb moisture in the air to interfere with the hydroxyl absorption peak of coal, and the experimental process requires absolute drying. The relative content of hydroxyl in coal can be compared and analyzed based on the peak position, peak shape, and peak area of the hydroxyl stretching vibration wave. Quantitative analysis of hydroxyl groups in coal also requires combination of elemental analysis and X-ray photoelectron spectroscopy.

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“…Herein, we choose the fruit shell of Camellia oleifera Abel (SCOA) as a potential cellulose source and develop a process to produce two distinct types of CNCs simultaneously. As an agricultural waste, SCOA is produced in millions of tons every year but mostly burnt. , To produce CNCs from SCOA is therefore of great economic and environmental significance. It was reported that the morphology of SCOA is quite different from wood, and the composition analysis shows that SCOA contains significantly less cellulose but proportionally more lignin and hemicellulose than wood .…”

Section: Introductionmentioning

confidence: 99%

The Simultaneous Production of Two Distinct Types of Cellulose Nanocrystals

Chen

Ouyang

2022

Langmuir

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We develop a route to prepare two types of cellulose nanocrystals (CNCs, CNC1 and CNC2) from a unique biomass resource, the fruit shell of Camellia oleifera Abel (SCOA), by integrating sulfuric acid hydrolysis and high-pressure homogenization and examine the effects of hydrolysis time on characteristics of the CNCs during the process. The CNCs exhibit different evolutions in size, morphology, surface charge, and crystallinity with increasing hydrolysis time. While both the CNCs have high crystallinity, CNC1 is of rod-like character with a relatively low aspect ratio, and CNC2 exhibits a hairy appearance with a high aspect ratio. We highlight that controlled acid hydrolysis contributes to the formation of weak spots with an increased susceptibility for homogenizing cellulosic solid residues into hairy CNCs. This is a good step toward tailoring CNC properties in a conventional and scalable approach to maximize their potential applications.

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Thermal Characteristics and Kinetics of Waste Camellia oleifera Shells by TG–GC/MS

Cited by 14 publications

References 36 publications

Study on Nitrogen Migration during Co-Pyrolysis of Melamine-Impregnated Paper Waste and Camellia Oleifera Shell

Study on Nitrogen Migration during Co-Pyrolysis of Melamine-Impregnated Paper Waste and Camellia Oleifera Shell

Infrared Spectrum Characteristics and Quantification of OH Groups in Coal

The Simultaneous Production of Two Distinct Types of Cellulose Nanocrystals

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