Formation of aromatics and removal of nitrogen in catalytic fast pyrolysis of sewage sludge: A study of sewage sludge and model amino acids

Fu, Wei; Cao, Jing‐Pei; Zhao, Xiao-Yan; Ren, Jie; Gu, Bing-Lin; Wei, Xian‐Yong

doi:10.1016/j.fuel.2018.01.025

Cited by 89 publications

(29 citation statements)

References 41 publications

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“…Considering the carbon yields of amino acids (Wei et al 2018), they can be divided into aliphatic amino acids (AAA) and cyclic amino acids (CAA). Ala, Arg, and Lys were representative of AAA.…”

Section: Fatty Acids and Hhv In Hydrocharmentioning

confidence: 99%

Sludge char-to-fuel approaches based on the hydrothermal fueling IV: fermentation

Qin

Zhang

Yang

et al. 2021

Water Science and Technology

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Sewage sludge was subjected to hydrothermal fueling (HTF) (330 °C for 40 min), obtaining hydrochar at 13.5 MJ kg−1. The higher heating value (HHV) of the raw sludge was related to its fatty acid content. The results showed that although the higher heating value (HHV) of the raw sludge was related to its fatty acid content, with the intensification of HTF, the increase in aliphatic/cyclic amino acids determined the production of HHV in the hydrochar. In order to increase the content of fatty acids and amino acids, the sludge was fermented. However, the Bacteroidetes consumed the organic matter too early, which was detrimental to the production of HHV. Therefore, appropriate sludge fermentation is recommended to restrict excessive Bacteroidetes proliferation, decompose lipids to saturated fatty acids, and convert proteins to aliphatic/cyclic amino acids to increase the efficiency of converting sludge to fuel.

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Section: Fatty Acids and Hhv In Hydrocharmentioning

confidence: 99%

Sludge char-to-fuel approaches based on the hydrothermal fueling IV: fermentation

Qin

Zhang

Yang

et al. 2021

Water Science and Technology

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“…This conclusion is in line with the fact that the experimental yield of the former gas was shown to be much higher than that of the latter. 41 Phe pyrolysis also produces nitrogen-containing heterocyclic compounds such as pyrrole, pyridine, and indole. Wornat et al 42 stated that N-heteroaromatic compounds have good thermal stability, and Liu et al 43 found that it is difficult to form HCN and NH 3 during the pyrolysis of indole.…”

Section: Rate Constant Calculationmentioning

confidence: 99%

Density functional theory-based investigation of HCN and NH₃ formation mechanisms during phenylalanine pyrolysis

et al. 2020

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“…At higher temperatures (350-850 • C), acidic sites with small molecules and amino chains can promote the cleavage of streptamine to form olefins and NH 3 . Cyclic and aromatic amines are prone to dehydrate, decarboxylate, and deaminate to form aromatic compounds [40]. Cellulose monomers further break C-O to form short-chain molecules until they are converted into glucose.…”

Section: Pyrolysis Evolution Pathway Of Organic Carbon and Oxygen-conmentioning

confidence: 99%

“…NH3. Cyclic and aromatic amines are prone to dehydrate, decarboxylate, and deaminate to form aromatic compounds [40]. Cellulose monomers further break C-O to form short-chain molecules until they are converted into glucose.…”

Section: Pyrolysis Evolution Pathway Of Organic Carbon and Oxygen-conmentioning

confidence: 99%

Thermal Transformation of Carbon and Oxygen-Containing Organic Compounds in Sewage Sludge During Pyrolysis Treatment

et al. 2019

Energies

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Organic carbon (C) and oxygen (O) contained in sewage sludge strongly impact its thermal behavior during pyrolysis treatment. This study was aimed at getting an insight into the decomposition mechanism of organic compounds containing C and O during sludge pyrolysis using thermo-gravimetric Fourier transform infrared spectroscopy (TG-FTIR) and pyrolysis-gas-chromatography/mass spectrometry (Py-GC/MS) and helpfully improving energy conversion of sewage sludge. The temperature domains of transformation were determined and indications of the main compounds produced during each stage were obtained. Results showed that the volatile compounds that evolved after sludge pyrolysis were mainly distributed into six groups: alkenes, aromatic hydrocarbons, alcohols, aldehydes, phenols and carboxylic acids. Comparison in thermal behavior and composition of the evolved volatile compounds were observed. In the low temperature stage (<350 °C), compounds containing O–C=O accounted for the highest proportion in the evolved gas (55%). Over 350 °C, the production of C=C, –OH, and –C6H5 compounds gradually increased; but little was found of compounds containing O–C=O. Above 550 °C, as thermal chemical reaction involving oxygen-containing groups enhanced, compounds containing O–C=O and –OH tended to disappear, and an increasing amount of macromolecular polycyclic aromatic hydrocarbon was formed. Finally, the thermal transformation pathways of the oxygen and carbon-containing compounds were proposed.

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Formation of aromatics and removal of nitrogen in catalytic fast pyrolysis of sewage sludge: A study of sewage sludge and model amino acids

Cited by 89 publications

References 41 publications

Sludge char-to-fuel approaches based on the hydrothermal fueling IV: fermentation

Sludge char-to-fuel approaches based on the hydrothermal fueling IV: fermentation

Density functional theory-based investigation of HCN and NH₃ formation mechanisms during phenylalanine pyrolysis

Thermal Transformation of Carbon and Oxygen-Containing Organic Compounds in Sewage Sludge During Pyrolysis Treatment

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Formation of aromatics and removal of nitrogen in catalytic fast pyrolysis of sewage sludge: A study of sewage sludge and model amino acids

Cited by 89 publications

References 41 publications

Sludge char-to-fuel approaches based on the hydrothermal fueling IV: fermentation

Sludge char-to-fuel approaches based on the hydrothermal fueling IV: fermentation

Density functional theory-based investigation of HCN and NH3 formation mechanisms during phenylalanine pyrolysis

Thermal Transformation of Carbon and Oxygen-Containing Organic Compounds in Sewage Sludge During Pyrolysis Treatment

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Density functional theory-based investigation of HCN and NH₃ formation mechanisms during phenylalanine pyrolysis