采用 PI TOF-MS进行实时监测,40秒内就可以发现最初形成的乙烯,而甲醇的出现较晚,TOF-MS与GC-MS数据的结果一致。在反应物释放前的就可以检测到乙烯表明,表面吸附的物种(如甲醇、DME、SMS和其他一些C1物种)的直接转化,应该负责具有碳碳键的初始碳氢化合物的形成,初始甲醇转化过程中第一个碳碳键形成的关键集中在使用C1反应物直接生成碳碳键的中间体或前体上。
Detection and imaging of multi-reaction zones is an essential tool for understanding the detailed structureof complicated flames. In this work a combined 4-camera technique is presented for multi-reaction zonesimaging. The technique combines highly advanced laser-based diagnostics tools, namely Rayleigh scattering,laser-induced predissociation fluorescence (LIPF) of OH, LIF of PAH, and LIF of formaldehyde (CH2O). Theapplication of this combined technique in turbulent non-homogeneous hydrocarbon flames is quite new. Thetechnique shows its ability to detect simultaneously rich, lean and diffusion reaction zones. The 3 reactionzones can be spatially resolved, providing essential information about their interaction and overall flamestability. Therefore, the detection and study of triple flame structures in non-homogeneous turbulent flamesbecomes possible. An example of a triple flame structure in a turbulent lifted non-premixed methane flameis presented. The present work proves that the developed technique is a powerful tool for multi-reactionzone measurements in turbulent and laminar flames.
Carbon, hydrogen, and nitrogen determination is partof the ultimate analysis of coal fuel material, aiding incharacterizing the material and providing informationthat can be utilized in calculating material/energybalances and efficiencies, as well as emissionpotentials for the coal fuel. The carbon, hydrogen, andnitrogen results for a coal material are also utilized toevaluate the reactivity potential for its use in aliquefaction or gasification process.