摘要
研究了数种烃包括液态苯和甲苯以及气态的甲烷、乙烯及乙炔在氮热等离子体中的热解行为。结果发现，所有烃化合物在氮等离子体中均发生了强烈的分解反应，生成大量炭黑和气体。气体产物中的主要成分是氢、乙炔和丙炔腈，在液态烃苯和甲苯的热解产物中还含有甲烷及乙烯等小分子烃。乙炔的浓度与丙炔腈的含量有关。丙炔腈的含量高时，乙炔的浓度低，反之亦然。所制得的炭黑颗粒细小，粒度分布范围较窄，具有较强的吸附性能，其碘值为１４０～１８０ｍｇ／ｇ。用红外光谱研究了炭黑的表面结构，发现此类炭黑中存在芳香Ｃ－Ｃ键及大量氮基官能团，如＝ＮＨ、－ＣＮ等。
The flash pyrolysis of several gaseous and liquid hydrocarbons including benzene, toluene, methane and ethane in a DC nitrogen plasma jet at atmospheric pressure has been studied The results show that all of the hydrocarbons used undergo very fast and complex reactions with highly reactive plasma species and decompose completely, producing a large amount of gas and carbon black The main components of the gas products are hydrogen, acetylene and cyanoacetylene Some small hydrocarbons, such as methane and ethylene are also obtained in the case of benzene and toluene pyrolysis The concentration of cyanoacetylene in the gas is related to that of acetylene It is believed that acetylene acts as a precursor of cyanoacetylene The carbon blacks with a very narrow size distribution have a small average diameter of 2 2￣5 5μm and good adsorption capacity with an Iodine value of 140￣180 mg·g 1 The FTIR spectra reveal that there exist some aromatic C-C bonds and a large amount of nitrogencontaining functional groups in the carbon blacks, such as =NH and -CN groups
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1998年第6期481-485,共5页
Journal of Fuel Chemistry and Technology
基金
辽宁省博士科研基金
关键词
烃
热解
氮等离子体
炭黑
hydrocarbon, pyrolysis, nitrogen plasma, carbon black
