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题名: TG-FTIR, Py-two-dimensional GC-MS with heart-cutting and LC-MS/MS to reveal hydrocyanic acid formation mechanisms during glycine pyrolysis
作者: Hao, Jufang1, 2;  Guo, Jizhao2;  Ding, Li2;  Xie, Fuwei2;  Xia, Qiaoling2;  Xie, Jianping2
关键词: Glycine ;  Pyrolysis ;  Hydrocyanic acid ;  Formation mechanism
刊名: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
发表日期: 2014
DOI: 10.1007/s10973-013-3214-0
卷: 115, 期:1, 页:667-673
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical ;  Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: To elucidate the formation process of HCN from the pyrolysis of glycine, the small molecule gaseous pyrolysates, H2O, NH3, CO2, CO, HNCO, and HCN, were analyzed in real-time by TG-FTIR. The appearance of the volatile pyrolysis products and the solid residue was determined in real-time at their corresponding formation temperatures by online Py-two-dimensional GC-MS with heart-cutting and LC-MS/MS. The pyrolysis of 2,5-diketopiperazine, a thermolytic by-product of glycine pyrolysis, was also studied. The results showed that: (1) the pyrolysis of glycine can be divided into three temperature ranges 200-300, 300-440, and 440-900 A degrees C; HCN forms in each range with three peaks appearing at 273, 422, and 763 A degrees C, respectively. (2) The mechanistic pathways of HCN formation from glycine in the low- and high-temperature heating stages are different. Below 273 A degrees C, glycine undergoes a decarboxylation reaction to produce methylamine, which subsequently forms HCN by means of dehydrogenation. Above 300 A degrees C, glycine gives relatively large amounts of HCN via 2,5-diketopiperazine and subsequent HNCO or methylenimine formation.
关键词[WOS]: ALPHA-AMINO-ACIDS ;  MASS-SPECTROMETRY ;  THERMAL-DECOMPOSITION ;  SOLID-STATE ;  PRODUCTS ;  LEUCINE
语种: 英语
WOS记录号: WOS:000329621100081
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145817
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.CNTC, Zhengzhou Tobacco Res Inst, Zhengzhou 450001, Henan, Peoples R China

Recommended Citation:
Hao, Jufang,Guo, Jizhao,Ding, Li,et al. TG-FTIR, Py-two-dimensional GC-MS with heart-cutting and LC-MS/MS to reveal hydrocyanic acid formation mechanisms during glycine pyrolysis[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2014,115(1):667-673.
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