期刊
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
卷 157, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jaap.2021.105212
关键词
Nitropropane; Pyrolysis; Intermediates; Flow reactor; Synchrotron VUV photoionization mass; spectrometry
资金
- National Natural Science Foundation of China [51876141]
An experimental study on the pyrolysis of 2-nitropropane was conducted at low pressure, detecting various pyrolysis species and nitrogenous intermediates using VUV photoionization and MBMS techniques. The findings were used to discuss the pyrolysis pathways of 2-NP.
An experimental study of 2-nitropropane (2-NP) pyrolysis was performed in a flow reactor at low pressure (4.0 kPa) and in the temperature range of 523-923 K. The pyrolysis species were detected with the tunable synchrotron vacuum ultraviolet (VUV) photoionization and molecular-beam mass spectrometry (MBMS) techniques. Species from m/z = 15 to 87, such as radicals of CH3, C2H5, C3H5 and C3H7; isomers of C3H4 (allene and propyne), C5H8 (1,3-pentadiene and cyclopentene), were identified from near-threshold photoionization efficiency (PIE) spectra. Four nitrogenous intermediates never reported in the homogeneous pyrolysis of 2-NP (i.e., 2propen-1-imine, 2-propen-1-amine, acetamide and 2-nitropropene) were identified in this work. The mole fraction profiles of the pyrolysis species were evaluated at different temperatures. Based on the experimental findings, the pyrolysis pathways of 2-NP were discussed.
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