Synthesis of high pure crystalline paratellurite by chemical combustion reaction

2021 ◽  
Vol 855 ◽  
pp. 157510
Author(s):  
E. Sukhanova ◽  
M. Grishechkin ◽  
A. Dovnarovich ◽  
M. Zykova ◽  
A. Khomyakov ◽  
...  
Keyword(s):  
Combustion Reaction

scholarly journals Effect of CaO on catalytic combustion of semi-coke

2021 ◽  
Vol 10 (1) ◽  
pp. 011-020
Author(s):  
Luyao Kou ◽  
Junjing Tang ◽  
Tu Hu ◽  
Baocheng Zhou ◽  
Li Yang
Keyword(s):  
Activation Energy ◽  
Apparent Activation Energy ◽  
Combustion Rate ◽  
Activation Energies ◽  
Combustion Reaction ◽  
Tg Analysis ◽  
Conversion Rates ◽  
Apparent Activation Energies ◽  
Ozawa Integral Method ◽  
Addition Amount

Abstract Generally, adding a certain amount of an additive to pulverized coal can promote its combustion performance. In this paper, the effect of CaO on the combustion characteristics and kinetic behavior of semi-coke was studied by thermogravimetric (TG) analysis. The results show that adding proper amount of CaO can reduce the ignition temperature of semi-coke and increase the combustion rate of semi-coke; with the increase in CaO content, the combustion rate of semi-coke increases first and then decreases, and the results of TG analysis showed that optimal addition amount of CaO is 2 wt%. The apparent activation energy of CaO with different addition amounts of CaO was calculated by Coats–Redfern integration method. The apparent activation energy of semi-coke in the combustion reaction increases first and then decreases with the increase in CaO addition. The apparent activation energies of different samples at different conversion rates were calculated by Flynn–Wall–Ozawa integral method. It was found that the apparent activation energies of semi-coke during combustion reaction decreased with the increase in conversion.

Acid etching induced defective Co3O4 as an efficient catalyst for methane combustion reaction

2021 ◽  
Vol 45 (7) ◽  
pp. 3546-3551
Author(s):  
Liurui Bao ◽  
Le Chang ◽  
Lisha Yao ◽  
Wenhao Meng ◽  
Qiang Yu ◽  
...  
Keyword(s):  
Noble Metal ◽  
Methane Combustion ◽  
Combustion Reaction ◽  
Metal Catalyst ◽  
Acid Etching ◽  
Noble Metal Catalyst ◽  
Environmental Significance ◽  
Efficient Catalyst

Development of an effective Co3O4 material as an advanced non-noble metal catalyst for methane combustion has great economic and environmental significance.

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

Production of nickel-doped ZnO-based NTC thermistor via combustion reaction

2021 ◽  
Author(s):  
Wictor Magnus Patrício Araújo de Lima ◽  
Luiz Henrique de Carvalho Filho ◽  
Rafael Alexandre Raimundo ◽  
Danniel Ferreira de Oliveira ◽  
Ramon Alves Torquato
Keyword(s):  
Combustion Reaction ◽  
Ntc Thermistor ◽  
Doped Zno

Ni-Zn Ferrite Nanoparticles Prepared by Combustion Reaction

2003 ◽  
Vol 416-418 ◽  
pp. 699-704 ◽  
Author(s):  
Ana Cristina Figueiredo de Melo Costa ◽  
Edner Tortella ◽  
Márcio R. Morelli ◽  
Ruth Herta Goldsmith Aliaga Kiminami
Keyword(s):  
Ferrite Nanoparticles ◽  
Combustion Reaction ◽  
Zn Ferrite

An efficient solution for the single-step synthesis of 4CaO·Al2O3·Fe2O3 powders

2009 ◽  
Vol 24 (1) ◽  
pp. 245-252 ◽  
Author(s):  
Robert Ianoş
Keyword(s):  
Combustion Synthesis ◽  
Solution Combustion Synthesis ◽  
Cost Effective ◽  
Fuel Mixture ◽  
Single Step ◽  
Combustion Reaction ◽  
Exothermic Effect ◽  
Solution Combustion ◽  
Time Saving ◽  
X Ray

Single-phase nanocrystalline 4CaO·Al2O3·Fe2O3 powders were prepared directly from the combustion reaction using a new cost-effective, time-saving, and environmentally friendly version of solution combustion synthesis. Instead of a single fuel, a fuel mixture of urea and β-alanine was used. It was shown by x-ray diffraction, energy-dispersive x-ray analysis, thermogravimetric analysis, and optical microscopy that this new version of the solution combustion synthesis allows the maximization of the exothermic effect associated with the combustion reaction. On the other hand, it was shown that the traditional version of combustion synthesis involving the use of a single fuel, such as urea or β-alanine, does not ensure the formation of Ca4Al2Fe2O10 unless subsequent thermal treatments are applied. It was suggested that the occurrence of combustion reactions cannot be regarded only in terms of adiabatic temperature, as the kinetic aspects overrule the thermodynamic ones.

Sign in / Sign up

Export Citation Format

Share Document