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Pyrolysis of Polytrimethylene Terephthalate(PTT) Fiber by Pyrolysis Gas Chromatography-Mass Spectroscopy
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作者 钱和生 《Journal of Donghua University(English Edition)》 EI CAS 2007年第5期604-609,共6页
Pyrolysis of polytrimethylene terephthalate(PTT) fiber has been investigated by pyrolysis gas chromatography-mass spectroscopy in the temperature range from 400℃ to 750℃ in order to observe the possible effect of th... Pyrolysis of polytrimethylene terephthalate(PTT) fiber has been investigated by pyrolysis gas chromatography-mass spectroscopy in the temperature range from 400℃ to 750℃ in order to observe the possible effect of the temperature on its composition of pyrolysates.At 400℃,pyrolysis of molecular chain could occur,only 13 pyrolysates could be identified.The trimethylene moieties bound to the macromolecular core by ester bonds are cleaved at around 400℃.At 550℃-750℃,pyrolysis of molecular chain could completely take place,46 pyrolysates could be found.As the temperature increases,the compositions of pyrolysate are distinctly increased.Several compounds,especially benzoic acid,monopropenyl-p-phthalate,2-propenyl benzoate,di-2-propenyl ester,1,4-benzenedicarboxylic acid,benzene,1,5-hexadiene,biphenyl and 1,3-propanediol dibenzoate could be formed.The thermal degradation mechanism,which is determined by structure and amount of the thermal decomposition products,are described.During pyrolysis of polytrimethylene terephthalate,polymeric chain scissions take place a peeling reaction as a successive removal of the dimer units from the polymeric chain.The chain scissions are followed by the elimination reaction,linkage action and secondary reactions,which bring about a variety fragment. 展开更多
关键词 polytrimethylene terephthalate fiber PYROLYSIS thermal degradation gas chromatography mass spectroscopy
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Analysis of Pyrolysates for Polysulphoneamide Fiber by Py-GC/MS
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作者 钱和生 林丹丽 《Journal of Donghua University(English Edition)》 EI CAS 2006年第2期63-67,共5页
Pyrolysis of polysulphoneamide fiber has been investigated using pyrolysis gas chromatography-mass spectroscopy at the different temperatures from 420℃ to 750℃. Its compositions of pyrolysates have been analyzed. At... Pyrolysis of polysulphoneamide fiber has been investigated using pyrolysis gas chromatography-mass spectroscopy at the different temperatures from 420℃ to 750℃. Its compositions of pyrolysates have been analyzed. At 420℃,pyrolysis of molecular chain could not completdy take place, 12 compounds of pyrolysis have only been identified. When the temperature increases, the compositions of pyrolysate increase sharply. Several compounds, especially sulfur dioxide, benzene, aniline, benzoic acid, 1,4-benzene dicaronitrile, N-phenyl-acetamide, diphenylamine, benzc[g] isoquinoline, N-phenyl-benzamide, hi-( 4-cyanophenyl )benzamide, could be formed. The degradation mechanisms which are determined by structure and amount of the thermal decomposition products are described. During pyrolysis, for polysulphoneamide, polymeric chain scissions take place as a successive removal of the monomer units from the polymeric chain. The chain scissions are followed by secondary reactions, which lead to a variety of compounds. Additional reactions can also take place during pyrolysis. 展开更多
关键词 polysulphoneamide fiber PYROLYSIS gas chromatography mass spectroscopy.
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Pyrolysis of Agroindustrial Residues of Coffee, Sugarcane Straw and Coconut-Fibers in a Semi-pilot Plant for Production of Bio-oils: Gas Chromatographic Characterization
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作者 Mozart D. Bispo Jamilly Andressa Santos Barros +4 位作者 Debora Tomasini Carmem Primaz Elina B. Caramao Claudio Dariva Laiza C. Krause 《Journal of Earth Science and Engineering》 2016年第5期235-244,共10页
Microbial, vegetal or animal organic matter, which has potential to be transformed into energy, is considered biomass. Among the various alternative energy sources, biomass is the only one with the possibility of gene... Microbial, vegetal or animal organic matter, which has potential to be transformed into energy, is considered biomass. Among the various alternative energy sources, biomass is the only one with the possibility of generating a class of substances of interest for fine chemistry (ketones, aldehydes, alcohols, phenols, etc.). From biomass, it is possible to produce bio-oil using pyrolysis, a thermodegradation process. The quality of the bio-oil depends on the process conditions (pyrolysis temperature, heating temperature, etc.) and biomass used. In this paper, the pyrolysis (using a fixed bed reactor) of three biomasses (coconut fiber, coffee grounds and sugar cane straw) is studied. The results indicated that the bio-oil yields for all biomass were similar, approximately 37%. The chemical profile obtained by gas chromatography coupled with mass spectrometry (GC/qMS) showed high amounts of fatty acids in the coffee grounds bio-oil and aliphatic and aromatic hydrocarbons in coconut fiber bio-oil, whereas guaiacols were the predominant components of the sugar cane straw bio-oil. 展开更多
关键词 PYROLYSIS GC/qMS Biomass coconut fiber coffee grounds sugarcane straw.
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不同类型有机质热演化轻烃产率及组成特征对比 被引量:5
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作者 祁帅 李贤庆 +4 位作者 何坤 张光武 陈金明 高文杰 梁万乐 《天然气地球科学》 EI CAS CSCD 北大核心 2017年第6期975-986,共12页
结合黄金管热模拟实验及模拟产物的轻烃(C_(6-14))定量分析,对不同类型有机质热演化过程中轻烃产率及组成特征进行了对比研究。基于热解—色谱—质谱(PY-GC-MS)方法对模拟产物轻烃定量分析表明,具有较高氢指数(I_H)的湖相Ⅰ型和海相Ⅱ_... 结合黄金管热模拟实验及模拟产物的轻烃(C_(6-14))定量分析,对不同类型有机质热演化过程中轻烃产率及组成特征进行了对比研究。基于热解—色谱—质谱(PY-GC-MS)方法对模拟产物轻烃定量分析表明,具有较高氢指数(I_H)的湖相Ⅰ型和海相Ⅱ_1型有机质的轻烃产率明显高于海相Ⅱ_2型有机质。松辽盆地白垩系湖相Ⅰ型有机质的最大轻烃产率为33.56mg/g_(TOC),张家口地区下马岭组海相Ⅱ_1型有机质的最大轻烃产率为39.58mg/g_(TOC),四川盆地二叠系海相Ⅱ_2型有机质的最大轻烃产率为10.08mg/g_(TOC)。相对来说,轻烃产物中芳烃相对含量明显要高于饱和烃。同时,Ⅰ型有机质达到最大轻烃产率对应的热解温度或成熟度要明显低于Ⅱ_型有机质。热解过程中不同碳数正构烷烃产率的演化结果表明,低碳数烷烃达到最大产率时的等效镜质体反射率(Easy%R_O)值普遍高于高碳数烷烃,这归因于低碳数烷烃生成和裂解时的活化能更高。此外,通过热解过程中轻烃产物组成分析,认为萘含量、苯/正己烷与甲苯/正庚烷等参数与成熟度具有明显的相关性,可用于指示有机质热演化程度。 展开更多
关键词 不同类型有机质 轻烃组成 黄金管热解 热解—色谱—质谱 热演化
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