Study on the nitrogen transformation during the primary pyrolysis of sewage sludge by Py-GC/MS and Py-FTIR

Zhou, Peng; Xiong, Sijiang; Zhang, Yuxuan; Jiang, Hua; Chi, Yongchao; Li, Lei

doi:10.1016/j.ijhydene.2017.04.144

Cited by 65 publications

(41 citation statements)

References 25 publications

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“…The pyrolysis of walnut shells was analysed by TG (NETZSCH, Germany) within a temperature range of room temperature to 9008C at a heating rate of 10, 20, 40 and 608C min 21 under a high-purity helium flow rate of 50 ml min 21 . A total sample of 20.00 mg was pyrolyzed by TG.…”

Section: Methodsmentioning

confidence: 99%

“…Fedelich [17] analysed the quantification of low-content styrene-butadiene rubber in natural rubber by TG-GC-MS, and the results indicated that TG-GC-MS is a novel method that can be used to investigate the pyrolytic process. Feng et al [18] evaluated the molecular structure of Shengli lignite by analysing the structure and content of the pyrolysis products via TG-GC-MS. With regard to the analytical methods, TG-GC-MS is similar to pyrolysis-gas chromatography-mass spectrometry (PY-GC-MS), which can be used to analyse the volatile components of pyrolysis under certain temperature conditions [20][21][22]. Compared with PY-GC-MS, TG-GC-MS results can provide much information and contribute to identifying the reaction point of pyrolysis [15].…”

Section: Introductionmentioning

confidence: 99%

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Thermal behaviour of walnut shells by thermogravimetry with gas chromatography–mass spectrometry analysis

Fan

et al. 2018

R. Soc. open sci.

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The present study introduces thermogravimetry with gas chromatography–mass spectrometry (TG-GC-MS) at four different heating rates to investigate the activation energy and thermal degradation behaviour of walnut shell pyrolysis. The distributed activation energy model (DAEM) was applied to investigate the activation energy. According to values of the activation energy and the correlation coefficient by the DAEM, the activation energy (98.69–267.75 kJ mol−1) and correlation coefficient (0.914–0.999) were determined for pyrolysis of walnut shells. GC-MS was performed to investigate the pyrolysis products from walnut shells at different critical temperature points. More than 20 different substances were identified at different temperatures from GC-MS results. With the increasing pyrolysis temperature, furan, furfural, benzene and long chain alkanes were successively identified in different GC-MS experimental results.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal behaviour of walnut shells by thermogravimetry with gas chromatography–mass spectrometry analysis

Fan

et al. 2018

R. Soc. open sci.

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“…Py-GC/MS experiments were performed to investigate the distribution of organic products from sludge pyrolysis. The experimental conditions selected in this study were based on some previous literatures [15,23,24]. A CDS Pyroprobe 5000 HP pyrolyser connected to a gas chromatography/mass spectrometry (Agilent Technologies 5977A MSD) was employed to conduct these tests.…”

Section: Pyrolysis-gas-chromatography/mass Spectrometry (Py-gc/ms) Tementioning

confidence: 99%

“…This constraint limited the quantitative analysis of volatile product obtained. Therefore, an approach based on peak area value was adopted to represent the concentration of each compound identified and enable a direct comparison on the transformation of oxygen and carbon-containing compounds in this work [15]. At the low temperature pyrolysis (<350 • C), the volatile compounds containing O-C=O accounted for the highest proportion of the total detected substances, at about 53.27%.…”

Section: Py-gc/ms Analysismentioning

confidence: 99%

“…Shen et al characterized the thermo-gravimetric (TG) behavior and product yields of sludge pyrolysis under a five-temperature range using a TG analyzer coupled with Fourier transform infrared spectroscopy (FTIR) [10]. Zhou et al focused their study on studying the key intermediates by investigating the evolution of nitrogen-containing compounds in the char, tar, and gas products using pyrolysis-gas-chromatography/mass spectrometry (Py-GC/MS) and pyrolyzer-Fourier transform infrared spectrometry (Py-FTIR) [15]. Tian et al investigated nitrogen distribution and the evolution of nitrogen-containing functional groups in bio-oil, char and gas fractions from the pyrolysis of sludge [16].…”

Section: Introductionmentioning

confidence: 99%

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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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The effect of high temperature on syngas production by immediate pyrolysis of wet sewage sludge with sawdust

Yang

Zhu

et al. 2018

J Therm Anal Calorim

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Study on the nitrogen transformation during the primary pyrolysis of sewage sludge by Py-GC/MS and Py-FTIR

Cited by 65 publications

References 25 publications

Thermal behaviour of walnut shells by thermogravimetry with gas chromatography–mass spectrometry analysis

Thermal behaviour of walnut shells by thermogravimetry with gas chromatography–mass spectrometry analysis

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

The effect of high temperature on syngas production by immediate pyrolysis of wet sewage sludge with sawdust

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