Combustion reaction mechanism of four typical Chinese biomass by TG and DTG

2011 ◽  
Vol 7 ◽  
pp. S209-S215 ◽  
Author(s):  
Pei-Sheng Li ◽  
Qin Wang ◽  
Qiao Xu ◽  
Wan Yu ◽  
Ya-Nan Yue ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Combustion Reaction ◽  
Tg And Dtg

scholarly journals Combustion reaction mechanism in coaxial methane/air diffusion flame.

1988 ◽  
pp. 2037-2044 ◽  
Author(s):  
Keizo SAKAGUCHI ◽  
Seishiro FUKUTANI ◽  
Hiroshi JINNO
Keyword(s):  
Reaction Mechanism ◽  
Diffusion Flame ◽  
Combustion Reaction ◽  
Air Diffusion

scholarly journals Comparison of Combustion Models for Lifted Hydrogen Flames within RANS Framework

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 152
Author(s):  
Ali Cemal Benim ◽  
Björn Pfeiffelmann
Keyword(s):  
Reaction Mechanism ◽  
Turbulent Combustion ◽  
Reaction Mechanisms ◽  
Numerical Study ◽  
Combustion Reaction ◽  
Combustion Model ◽  
Prediction Quality ◽  
Combustion Models ◽  
Wide Range ◽  
Lift Off

Within the framework of a Reynolds averaged numerical simulation (RANS) methodology for modeling turbulence, a comparative numerical study of turbulent lifted H2/N2 flames is presented. Three different turbulent combustion models, namely, the eddy dissipation model (EDM), the eddy dissipation concept (EDC), and the composition probability density function (PDF) transport model, are considered in the analysis. A wide range of global and detailed combustion reaction mechanisms are investigated. As turbulence model, the Standard k-ε model is used, which delivered a comparatively good accuracy within an initial validation study, performed for a non-reacting H2/N2 jet. The predictions for the lifted H2/N2 flame are compared with the published measurements of other authors, and the relative performance of the turbulent combustion models and combustion reaction mechanisms are assessed. The flame lift-off height is taken as the measure of prediction quality. The results show that the latter depends remarkably on the reaction mechanism and the turbulent combustion model applied. It is observed that a substantially better prediction quality for the whole range of experimentally observed lift-off heights is provided by the PDF model, when applied in combination with a detailed reaction mechanism dedicated for hydrogen combustion.

Microstructure and formation mechanism of combustion-synthesized rodlike Ca α-sialon crystals

2001 ◽  
Vol 16 (7) ◽  
pp. 1928-1934 ◽  
Author(s):  
Kexin Chen ◽  
Haibo Jin ◽  
M. Oliveira ◽  
Heping Zhou ◽  
J. M. F. Ferreira
Keyword(s):  
Reaction Mechanism ◽  
Combustion Synthesis ◽  
Formation Mechanism ◽  
Particle Morphology ◽  
Morphological Features ◽  
Combustion Reaction ◽  
Synthesis Process ◽  
Two Dimensional ◽  
High Productivity ◽  
The Relationship

The fabrication of rodlike Ca α-sialon crystals through a combustion synthesis process is reported in this paper. The main morphological features in the product included rodlike crystals, two dimensional elongated platelets, and equiaxed particles. By proper adjustment of the combustion parameters, a high productivity of rodlike Ca α-sialon crystals in the final product could be achieved. The combustion reaction mechanism and the relationship between the combustion parameters and the particle morphology were investigated.

Numerical Investigations on Characteristics of Methane-Air Premixed Flame

2014 ◽  
Vol 1079-1080 ◽  
pp. 99-102
Author(s):  
Yi Su ◽  
Ning Wang
Keyword(s):  
Reaction Mechanism ◽  
Environmental Protection ◽  
Flame Front ◽  
Premixed Flame ◽  
Combustion Reaction ◽  
Oh Radicals ◽  
High Concentration ◽  
One Dimensional ◽  
Numerical Investigations ◽  
Intermediate Products

The combustion reaction mechanism of methane plays an important role on combustion, environmental protection and propulsion areas. Numerical investigations on the characteristics of Methane-Air premixed flame were conducted in this paper. Results indicate that: intermediate products such as HCO, CO increase first and then decrease; CO distributes behind HCO and is converted from HCO; The distribution of OH radicals is one dimensional, and there are two high concentration regions, only the region at the exit of the premixed gas corresponds to the flame front; final products such as CO2 and H2O exist at the whole reaction area.

Reaction Mechanism Study on Combustion of Micro Nanometer Iron Powder

2012 ◽  
Vol 535-537 ◽  
pp. 459-464
Author(s):  
Chuan Mei Zhang ◽  
Jing Jin ◽  
Dan Dan He ◽  
Hao Zhang ◽  
Jie Jiang ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Kinetic Parameters ◽  
Iron Powder ◽  
Combustion Reaction ◽  
Particle Sizes ◽  
Mechanism Study ◽  
Subsequent Growth ◽  
Heating Rates ◽  
Random Nucleation ◽  
Rational Control

Thermogravimetric curves of micro nanometer iron powder’s combustion were studied in different heating rates that were 10K/min, 20 K/min, 30 K/min and 40 K/min, and the particle sizes of iron were 100nm and 20μm. The iron’s kinetic parameters of combustion reaction were calculated by Coats-Redfern integral, differential and Kissinger methods, then the kinetic model was determined and the most probable mechanism function was verified by Popescu method. The results show that different heating rates, particle sizes and calculations can affect kinetic parameters and reaction mechanism. The activation energy of 100nm and 20μm iron powder’s combustion is 122.48 KJ/mol and 161.64 KJ/mol respectively. The combustion reaction of micro nanometer iron powder is controlled by random nucleation and subsequent growth model which is in agreement with Avrami-Erofeev equation. Rational control for the temperature and reaction time are conducive to optimize the combustion reaction of micro nanometer iron powder.

Arylation of enelactams using TIPSOTf: reaction scope and mechanistic insight

2021 ◽  
Author(s):  
Tomasz J. Idzik ◽  
Zofia M. Myk ◽  
Łukasz Struk ◽  
Magdalena Perużyńska ◽  
Gabriela Maciejewska ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Multinuclear Nmr ◽  
Mechanistic Insight ◽  
Nmr Study ◽  
Wide Range

Triisopropylsilyltrifluoromethanesulfonate can be effectively used for the arylation of a wide range of enelactams. The multinuclear NMR study provided deep insights into the reaction mechanism.

Theoretical study of the ketonization reaction mechanism of acetic acid over SiO2

2009 ◽  
Author(s):  
Mendel Fleisher ◽  
E. Lukevics ◽  
L. Leite ◽  
D. Jansone ◽  
K. Edolfa ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Reaction Mechanism ◽  
Theoretical Study

OPTIMIZATION OF A SURROGATE REDUCED AVIATION FUEL-AIR REACTION MECHANISM USING A GENETIC ALGORITHM

Clean Air ◽  
2007 ◽  
Vol 8 (1) ◽  
pp. 1-24
Author(s):  
M. Pourkashanian ◽  
N. S. Mera ◽  
Lionel Elliott ◽  
C. W. Wilson ◽  
Derek B. Ingham ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Reaction Mechanism ◽  
Aviation Fuel

Ligand-Enabled γ-C(sp3)–H Olefination of Free Carboxylic Acids

2020 ◽  
Author(s):  
Kiron Kumar Ghosh ◽  
Alexander Uttry ◽  
Francesca Ghiringhelli ◽  
Arup Mondal ◽  
Manuel van Gemmeren
Keyword(s):  
Reaction Mechanism ◽  
Carboxylic Acids ◽  
Michael Addition ◽  
Kinetic Studies ◽  
Wide Range ◽  
Palladium Catalyzed

We report the ligand enabled C(sp3)–H activation/olefination of free carboxylic acids in the γ-position. Through an intramolecular Michael-addition, δ-lactones are obtained as products. Two distinct ligand classes are identified that enable the challenging palladium-catalyzed activation of free carboxylic acids in the γ-position. The developed protocol features a wide range of acid substrates and olefin reaction partners and is shown to be applicable on a preparatively useful scale. Insights into the underlying reaction mechanism obtained through kinetic studies are reported.<br>

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