Influences of Equivalence Ratio on the Reaction Path of Dimethyl Ether

doi:10.7652/xjtuxb201405006

您当前的位置：

首页 >

文章列表页 >

Influences of Equivalence Ratio on the Reaction Path of Dimethyl Ether

更新时间：2025-07-09

- Influences of Equivalence Ratio on the Reaction Path of Dimethyl Ether
- Vol. 48, Issue 5, Pages: 32-36+77(2014)
- 作者机构：
  
  长安大学汽车学院,西安,710064
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201405006
  CLC： TK16
- Online First：10 May 2014，
  
  Published：2014
- 稿件说明：
移动端阅览
Influences of Equivalence Ratio on the Reaction Path of Dimethyl Ether[J]. 2014, 48(5): 32-36+77.
DOI：

Influences of Equivalence Ratio on the Reaction Path of Dimethyl Ether[J]. 2014, 48(5): 32-36+77. DOI： 10.7652/xjtuxb201405006.

摘要

为了研究当量比对二甲醚(DME)氧化分解过程的影响

利用同步辐射真空紫外光电离及分子束取样质谱技术

并结合CHEMKIN化学反应动力学模拟软件对不同燃料氧气当量比下的低压预混层流DME/O

/Ar火焰进行了实验和数值模拟研究。测量和计算了不同当量比DME火焰中主要物种及主要中间物种的摩尔分数空间分布曲线

分析了当量比对DME火焰结构及燃料的氧化分解路径的影响。结果表明:甲醛和甲基是DME燃烧过程中最主要的中间物种; 火焰中DME主要通过脱氢反应消耗

使DME产生脱氢反应的原子和原子团主要有H、OH、CH

和O

当量比不同则各基团在DME脱氢反应中的影响也不相同; DME的脱氢产物甲氧基甲基极不稳定

在火焰中一经生成就马上被消耗

其主要通过裂解反应消耗

在氧气过量的情况下

一小部分甲氧基甲基会发生加氧反应而被暂存起来。

Abstract

Low pressure premixed laminar dimethyl ether/oxygen/argon flames under different equivalence ratios were investigated experimentally and numerically to study the influence of equivalence ratio on dimethyl ether combustion. The mole fraction profiles of main species and major intermediates were measured by molecular-beam mass spectrometry combined with synchrotron radiation photoionization technology and calculated by PREMIX CODE according to the typically chemical reaction model of dimethyl ether. The influences of equivalence ratio on flame structure and reaction path of dimethyl ether were analyzed. The results show that formaldehyde and methyl are the main intermediates in dimethyl ether flames

and dimethyl ether is mainly consumed by dehydr

ogenation reactions by H

and O. The influences of radicals on dehydrogenation reactions vary with the changed equivalence ratios. Methoxy methyl produced by the dehydrogenation reaction of dimethyl ether is extremely unstable and will be consumed as soon as produced. Methoxy methyl is mainly consumed by β-decomposition reaction

or a bit reacts with oxygen under oxygen excessive condition.

关键词

Keywords

references

TENG H, MCCANDLEEE J C, SCHNEYER J B. Thermodynamic properties of dimethyl ether: an alternative fuel for compression-ignition engines[J]. SAE Transactions, 2004, 113(4): 134-157.

COOL T A, WANG J, HANSEN N, et al. Photoionization mass spectrometry and modeling studies of the chemistry of fuel-rich dimethyl ether flames[J]. Proceedings of the Combustion Institute, 2007, 31(1): 285-293.

TAKAHASHI K, YAMAMOTO O, INOMATA T, et al. Shock-tube studies on the reactions of dimethyl ether with oxygen and hydrogen atoms[J]. International Journal of Chemical Kinetics, 2007, 39(2): 97-108.

Hidaka Y, SATO K, YAMANE M. High-temperature pyrolysis of dimethyl ether in shock waves[J]. Combustion and Flame, 2000, 123(1/2): 1-22.

KONG S C. A study of natural gas/DME combustion in HCCI engines using CFD with detailed chemical kinetics[J]. Fuel, 2007, 86(10/11): 1483-1489.

罗马吉, 黄震, 陈志, 等. 二甲醚均质压燃燃烧的详细化学动力学模拟研究[J]. 汽车工程, 2004, 26(6): 642-647.

LUO Maji, HUANG Zhen, CHEN Zhi, et al. A study on the detailed chemical kinetics simulation for HCCI combustion of dimethyl ether[J]. Automotive Engineering, 2004, 26(6): 642-647.

郎静, 张煜盛. 论DME燃烧与微量污染物生成机理研究[J]. 内燃机工程, 2005, 26(6): 30-34.

LANG Jing, ZHANG Yusheng. Investigations of DME combustion and tiny pollutant formation mechanism[J]. Chinese Internal Combustion Engine Engineering, 2005, 26(6): 30-34.

卫立夏, 陈朝阳, 黄佐华, 等. 不同燃烧当量比对二甲醚燃烧的影响研究[J]. 工程热物理学报, 2009, 30(8): 1420-1422.

WEI Lixia, CHEN Zhaoyang, HUANG Zuohua, et al. Effect of equivalence ratio on the combustion of dimethyl ether/oxygen/argon flames[J]. Journal of Engineering Thermophysics, 2009, 30(8): 1420-1422.

QI Fei, YANG Rui, YANG Bin, et al. Isomeric identification of polycyclic aromatic hydrocarbons formed in combustion with tunable vacuum ultraviolet photoionization[J]. Review of Scientific Instruments, 2006, 77(8): 84-101.

ZHAO Z, CHAOS M, KAZAKOV A, et al. Thermal decomposition reaction and a comprehensive kinetic model of dimethyl ether[J]. International Journal of Chemical Kinetics, 2007, 40(1): 1-18.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Study of the Mechanism of Electrostatic Accumulation and Current Density Distribution Characteristics During Liquid Hydrogen Pipeline Transportation

Numerical Simulation of Space Charge Distribution Characteristics of Polyimide Materials under X-Ray Irradiation

Numerical Simulation Study on Geothermal Extraction Characteristics of Supercritical CO2 in Heterogeneous Fractures

Analysis of Exergy Destruction Characteristics in Laminar Premixed Dual Flames of Dimethyl Ether

Action Mechanism of Heat Transfer between the Working Medium and the Impeller on Aerodynamic Performance and Flow Characteristics of Radial Inflow Turbines with Supercritical Carbon Dioxide

Related Author

SUN Wenhao

LIU Hongbao

WANG Lei

QING Ziyou

LI Zhuolun

MA Yuan

LI Yanzhong

ZHONG Hui

Related Institution

School of Energy and Power Engineering，Xi’an Jiaotong University

Aerospace System Engineering Shanghai

School of Electrical Engineering，Xi’an Jiaotong University

Northwest Institute of Nuclear Technology

Institute of Electronic Engineering，China Academy of Engineering Physics

⁰