Effect of hydrogen and helium addition to fuel on soot formation in an axisymmetric coflow laminar methane/air diffusion flame

被引：87
|
作者：
Liu, Fengshan [1 ]
Ai, Yuhua [2 ]
Kong, Wenjun [2 ]
机构：
[1] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada
[2] Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Laminar diffusion flame; Soot formation; Hydrogen addition; Chemical kinetics; AGGREGATE FORMATION; ETHYLENE; MODEL; IMPLEMENTATION; HYDROCARBON; RADIATION; CHEMISTRY; SIZE;
D O I：
10.1016/j.ijhydene.2013.12.151
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A detailed numerical study was conducted to investigate the effects of hydrogen and helium addition to fuel on soot formation in atmospheric axisymmetric coflow laminar methane/air diffusion flame. Detailed gas-phase chemistry and thermal and transport properties were employed in the numerical calculations. Soot was modeled using a PAH based inception model and the HACA mechanism for surface growth and oxidation. Numerical results were compared with available experimental data. Both experimental and numerical results show that helium addition is more effective than hydrogen addition in reducing soot loading in the methane/air diffusion flame. These results are different from the previous investigations in ethylene/air diffusion flames. Hydrogen chemically enhances soot formation when added to methane. The different chemical effects of hydrogen addition to ethylene and methane on soot formation are explained in terms of the different effects of hydrogen addition on propargyl, benzene, and pyrene formation low in the flames. Crown Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：3936 / 3946
页数：11
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