Heat release of carbon particle formation from hydrogen-free precursors behind shock waves

被引：22

作者：

Emelianov, A. ^{[1
]}

Eremin, A. ^{[1
]}

Makeich, A. ^{[1
]}

Jander, H. ^{[2
]}

Wagner, H. Gg. ^{[2
]}

Starke, R. ^{[3
]}

Schulz, C. ^{[3
]}

机构：

[1] Russian Acad Sci, Inst High Energy Dent, Moscow, Russia

[2] Univ Gottingen, Inst Phys Chem, D-3400 Gottingen, Germany

[3] Univ Duisburg Essen, IVG, Essen, Germany

来源：

PROCEEDINGS OF THE COMBUSTION INSTITUTE | 2007年 / 31卷

基金：

俄罗斯基础研究基金会;

关键词：

carbon particle formation; heat release; shock waves; IR emission-absorption thermometry; extinction measurements;

D O I：

10.1016/j.proci.2006.07.063

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The process of heat release during carbon particle formation and growth after pyrolysis of carbon suboxide C3O2 behind shock waves was investigated. For this goal, temperature and optical density of gas-particle mixtures initially consisting of 3% C3O2 + 5% CO2 in Ar were measured as a function of time. The temperature was determined by two-channel emission-absorption spectroscopy lambda = 2.7 +/- 0.4 mu m, corresponding to the CO2 (1,0,1) vibrational band. In the range of initial temperatures behind the shock waves from 1600 up to 2200 K a significant heating of the Mixture during particle formation and growth was observed that increased towards higher temperatures. The analysis of the obtained data in combination with previous results about the temperature dependence of the particle size shows a decrease of the heat release of condensation from similar to 200 kJ/mol per atom for particles containing similar to 1000 atoms to similar to 50 kJ/ mol per atom for particle containing similar to 10(6) atoms. (c) 2006 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

引用

页码：649 / 656

页数：8

共 18 条

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