Pyrolysis of chitin biomass: TG–MS analysis and solid char residue characterization

Qiao, Yan; Chen, Shuai; Liu, Ying; Sun, Hairui; Jia, Shiyu; Shi, Junyan; Pedersen, Christian; Wang, Yingxiong; Hou, Xun

doi:10.1016/j.carbpol.2015.07.005

Cited by 62 publications

(37 citation statements)

References 37 publications

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“…4(b), apart from the signals of aromatic nuclei, there were no other significant signals. This indicated the aromatic structure in the char residues, and agreed with the results of FTIR, as well as the char aromatization phenomena verified by model compounds (Qiao et al, 2015). Furthermore, similar results were also discovered in the pyrolysis of cellulose (Dumanlı & Windle, 2012;Pastorova, Botto, Arisz, & Boon, 1994).…”

Section: Volatiles and Char Evolution From Tgsupporting

confidence: 87%

“…During the whole process, the mass loss of chitin was 77.06 wt.%, and that of chitosan was 65.97 wt.%. All those differences between chitin and chitosan were in consisted with the literatures (Qiao et al, 2015;Tang et al, 2005), which were caused by the different chemical structures, mainly the different contents of the amino and acetamido group. Fig.…”

Section: Tg Dsc and Kineticsmentioning

confidence: 84%

“…Formation mechanism of char residues with aromatic structure during cellulose pyrolysis had been proposed (Dumanlı & Windle, 2012), and the revolution of char residues from chitin and chitosan were considered to undergo similar processes. However, the difference was that the char residues from chitin and chitosan were nitrogen-doped (Qiao et al, 2015;Zhao et al, 2010).…”

Section: Volatiles and Char Evolution From Tgmentioning

confidence: 95%

“…Recently, research on chitin and chitosan pyrolysis turns to focus on their thermal conversion. Zeng et al (2011Zeng et al ( , 2015 and Qiao et al (2015) detected the volatiles from the thermogravimetric processes of chitin and chitosan using TG-FTIR and TG-MS respectively. Furthermore, bio-oil from the fast pyrolysis of chitin and chitosan was off-line identified (Zeng et al, 2011;Zeng et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Value-added organonitrogen chemicals evolution from the pyrolysis of chitin and chitosan

Liu

Zhang

Xiao

et al. 2017

Carbohydrate Polymers

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Thermogravimetric characteristics of chitin and chitosan and their potentials to produce value-added organonitrogen chemicals were separately evaluated via TG/DSC-FTIR and Py-GC/MS. Results shown that chitin had the better thermal stability and higher activation energy than chitosan because of the abundant acetamido group. Furthermore, the dominated volatilization in active pyrolysis of chitin contributed to its endothermic property, whereas the charring in chitosan led to the exothermal. During fast pyrolysis, the acetamido group in chitin and chitosan was converted into acetic acid or acetamide. Typical products from chitosan pyrolysis were aza-heterocyclic chemicals, i.e. pyridines, pyrazines, and pyrroles, with the total selectivity of 50.50% at 600°C. Herein, selectivity of pyrazine compounds was up to 22.99%. These aza-heterocyclic chemicals came from the nucleophilic addition reaction of primary amine and carbonyl. However, main reaction during chitin pyrolysis was ring-opening degradation, which led to the formation of acetamido chemicals, especially acetamido acetaldehyde with the highest selectivity of 27.27% at 450°C. In summary, chitosan had the potential to produce aza-heterocyclic chemicals, and chitin to acetamido chemicals.

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Section: Volatiles and Char Evolution From Tgsupporting

confidence: 87%

Section: Tg Dsc and Kineticsmentioning

confidence: 84%

Section: Volatiles and Char Evolution From Tgmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Value-added organonitrogen chemicals evolution from the pyrolysis of chitin and chitosan

Liu

Zhang

Xiao

et al. 2017

Carbohydrate Polymers

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“…For chitin, a weight loss of ∼5% was observed in the range 30-110 • C due to the evaporation of water (Kaya et al, 2016). While in the range 280-400 • C, most of the weight loss has been accomplished, leading to a carbonaceous material residue (Qiao et al, 2015). In the range 30-200 • C, the weight of ChBD-CadA and I-ChBD-CadA slowly declined about 14wt% and 12wt% because of the removal of water.…”

Section: Characterization Of Immobilized Enzyme On Chitinmentioning

confidence: 99%

Cadaverine Production From L-Lysine With Chitin-Binding Protein-Mediated Lysine Decarboxylase Immobilization

Zhou

Zhang

Wei

et al. 2020

Front. Bioeng. Biotechnol.

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Lysine decarboxylase (CadA) can directly convert L-lysine to cadaverine, which is an important platform chemical that can be used to produce polyamides. However, the non-recyclable and the poor pH tolerance of pure CadA hampered its practical application. Herein, a one-step purification and immobilization procedure of CadA was established to investigate the cadaverine production from L-lysine. Renewable biomass chitin was used as a carrier for lysine decarboxylase (CadA) immobilization via fusion of a chitin-binding domain (ChBD). Scanning electron microscopy, laser scanning confocal microscopy, fourier transform infrared spectra, elemental analysis, and thermal gravimetric analysis proved that the fusion protein ChBD-CadA can be adsorbed on chitin effectively. Furthermore, the fusion protein (ChBD-CadA) existed better pH stability compared to wild CadA, and kept over 73% of the highest activity at pH 8.0. Meanwhile, the ChBD-CadA showed high specificity toward chitin and reached 93% immobilization yield within 10 min under the optimum conditions. The immobilized ChBD-CadA (I-ChBD-CadA) could efficiently converted L-lysine at 200.0 g/L to cadaverine at 135.6 g/L in a batch conversion within 120 min, achieving a 97% molar yield of the substrate L-lysine. In addition, the I-ChBD-CadA was able to be reused under a high concentration of L-lysine and retained over 57% of its original activity after four cycles of use without acid addition to maintain pH. These results demonstrate that immobilization of CadA using chitin-binding domain has the potential in cadaverine production on an industrial scale.

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Highly Efficient, Recyclable Microplastic Adsorption Enabled by Chitin Hydrogen Bond Network Rearrangement

Wu,

Ye,

Liu

et al. 2024

Adv Funct Materials

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A sustainable strategy based on chitin from waste seafood is proposed to remove nano‐size microplastics in water. A chitin nanofibrous foam is constructed by a new hydrogen bond rearrangement scheme without any crosslinking, which delivers an impressive high adsorption capacity of 411.14 ± 1.50 mg g−1 for small‐sized (< 1 µm) microplastics. This excellent adsorption capacity stems from the rough fibrous surface structure of the highly porous foam, the positively charged nature of the partially deacetylated chitin and other molecular interactions introduced by the activation and increased exposure of ‐OH, ‐NH2 and ‐NHCO‐ groups. Molecular dynamics simulation further demonstrates that C‐H‐π, O‐H‐π, and C = O‐π interactions between the microplastics and chitin foam facilitates the efficient removal of microplastics. A high removal efficiency is maintained even in salty water, a property that exemplifies good adaptability to various water bodies. Finally, two proof‐of‐principle scenarios are presented for converting the recovered microplastics into value‐added products. Thus, the entire cycling strategy represents a powerful remedy for the urgent yet challenging ocean microplastic pollution problem.

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Pyrolysis of chitin biomass: TG–MS analysis and solid char residue characterization

Cited by 62 publications

References 37 publications

Value-added organonitrogen chemicals evolution from the pyrolysis of chitin and chitosan

Value-added organonitrogen chemicals evolution from the pyrolysis of chitin and chitosan

Cadaverine Production From L-Lysine With Chitin-Binding Protein-Mediated Lysine Decarboxylase Immobilization

Highly Efficient, Recyclable Microplastic Adsorption Enabled by Chitin Hydrogen Bond Network Rearrangement

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