Influence of molecular hydrogen on acetylene pyrolysis: Experiment and modeling

被引:17
作者
Aghsaee, Mohammad
Duerrstein, Steffen H.
Herzler, Juergen
Boehm, Heidi
Fikri, Mustapha [1 ]
Schulz, Christof
机构
[1] Univ Duisburg Essen, IVG, Inst Combust & Gas Dynam React Fluids, D-47048 Duisburg, Germany
关键词
Acetylene pyrolysis; Shock tube with TOF-MS; Kinetics modeling; Soot formation; SOOT FORMATION; DIFFUSION FLAMES; THERMAL-DECOMPOSITION; OXIDATION; C2H2; TEMPERATURE; MECHANISM; MIXTURES; BEHAVIOR; METHANE;
D O I
10.1016/j.combustflame.2014.03.012
中图分类号
O414.1 [热力学];
学科分类号
摘要
The effect of molecular hydrogen on the formation of molecular carbonaceous species important for soot formation is studied through a combination of shock-tube experiments with high-repetition-rate time-of-flight mass spectrometry and detailed chemistry modeling. The experiment allows to simultaneously measure the concentration-time profiles for various species with a time resolution of 10 mu s. Concentration histories of reactants and polyacetylene intermediates (C2xH2, x = 1-4) are measured during the pyrolysis of acetylene with and without H-2 added to the gas mixture for a wide range of conditions. In the 1760-2565 K temperature range, reasonable agreement between the experiment and the model predictions for C2H2, C4H2, C6H2, and C8H2 is achieved. H-2 addition leads to the depletion of important building blocks for particle formation, namely of polyacetylenes due to an enhanced consumption of important radicals by H-2, which are required for the fast build-up of carbonaceous material. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
引用
收藏
页码:2263 / 2269
页数:7
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