Pyrolytic thermal decomposition behavior and kinetic parameters of Tetraselmis chuii microalgae

2020 ◽  
Author(s):  
Aloon Eko Widiono ◽  
Sukarni Sukarni ◽  
Retno Wulandari ◽  
Ardianto Prasetiyo ◽  
Heru Suryanto ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Parameters ◽  
Tetraselmis Chuii ◽  
Thermal Decomposition Behavior ◽  
Decomposition Behavior

Effect of composting on the thermal decomposition behavior and kinetic parameters of pig manure-derived solid waste

2018 ◽  
Vol 252 ◽  
pp. 59-65 ◽  
Author(s):  
Vaibhav Dhyani ◽  
Mukesh Kumar Awasthi ◽  
Quan Wang ◽  
Jitendra Kumar ◽  
Xiuna Ren ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Solid Waste ◽  
Kinetic Parameters ◽  
Pig Manure ◽  
Thermal Decomposition Behavior ◽  
Decomposition Behavior

Study on the Thermal Decomposition Behavior of MgAl-Hydrotalcite Compounds

2010 ◽  
Vol 152-153 ◽  
pp. 1451-1456
Author(s):  
Run Sheng Yao ◽  
Xu Wu ◽  
Ya Li Du ◽  
Xian Mei Xie ◽  
Zhi Zhong Wang
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Parameters ◽  
Ozawa Method ◽  
Dynamic Distribution ◽  
Thermal Decomposition Behavior ◽  
Decomposition Procedure ◽  
Ft Ir ◽  
Decomposition Behavior ◽  
Two Stages ◽  
Relative Theory

MgAl-hydrotalcite compounds (MgAl-HT) with different n(Mg)/n(Al) ratios were synthesized by coprecipitation method. XRD and FT-IR were performed to characterize the structure of MgAl-HT. TG-DTG technology was adopted to study the thermal decomposition behavior. It was discovered that the thermal decomposition proceeded in two stages when the ratios of n(Mg) toward n(Al) being to 2~4. The kinetic parameters of the thermal decomposition procedure were also calculated by Ozawa method, which demonstrated that the value of active energy showed dynamic distribution. At each step of the decomposition behavior, the value of active energy decreased at first and then rose. The value of active energy for the deformation of the water in the interlayer was located within 45~90 kJ•mol-1 and within 150~230 kJ•mol-1 for the deformation of structure hydroxyl. Those characteristics were discussed and explained according to relative theory.

Determination of Chemical Kinetic Parameters of Surrogate Solid Wastes

2004 ◽  
Vol 126 (4) ◽  
pp. 685-692 ◽  
Author(s):  
D. Jinno ◽  
Ashwani K. Gupta ◽  
K. Yoshikawa
Keyword(s):  
Thermal Decomposition ◽  
Heat Flow ◽  
Kinetic Parameters ◽  
Heating Rate ◽  
Chemical Kinetic ◽  
Solid Wastes ◽  
Heating Rates ◽  
Kinetics Parameters ◽  
Thermal Decomposition Behavior ◽  
Decomposition Behavior

Results on the thermal decomposition behavior of several important components in solid wastes are presented under controlled chemical and thermal environments. Thermogravimetry (TGA) tests were conducted on the decomposition of cellulose, polyethylene, polypropylene, polystyrene and polyvinyl chloride in inert (nitrogen), and oxidative (air) atmospheres. Inert condition tests were performed at heating rates of 5, 10, 30, and 50°C/min while the oxidative condition tests were performed at one heating rate of 5°C/min. Differential scanning calorimetry (DSC) was also used to measure the heat flow into and out of the sample during thermal decomposition of the material. The TGA results on the mass evolution of the materials studied as a function of temperature showed that the cellulose contained a small amount of moisture whereas no moisture was found in the other materials examined. The DSC curve showed the heat flow into and out of the sample during the process of pyrolysis and oxidative pyrolysis. The temperature dependence and mass loss characteristics of materials were used to evaluate the Arrhenius kinetic parameters. The surrounding chemical environment, heating rate, and material composition and properties affect the overall decomposition rates under defined conditions. The composition of these materials was found to have a significant effect on the thermal decomposition behavior. Experimental results show that decomposition process shifts to higher temperatures at higher heating rates as a result of the competing effects of heat and mass transfer to the material. The results on the Arrhenius chemical kinetic parameters and heat of pyrolysis obtained from the thermal decomposition of the sample materials showed that different components in the waste have considerably different features. The thermal decomposition temperature, heat evolved and the kinetics parameters are significantly different various waste components examined. The amount of thermal energy required to destruct a waste material is only a small faction of the energy evolved from the material. These results assist in the design and development of advanced thermal destruction systems.

Influence of thermal decomposition behavior of titanium precursors on (Ba,Sr)TiO3 thin films

2001 ◽  
Vol 11 (PR3) ◽  
pp. Pr3-675-Pr3-682 ◽  
Author(s):  
Y. S. Min ◽  
Y. J. Cho ◽  
D. Kim ◽  
J. H. Lee ◽  
B. M. Kim ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Decomposition ◽  
Thermal Decomposition Behavior ◽  
Decomposition Behavior

scholarly journals Preparation of Few-Layered WS2 and Its Thermal Catalysis for Dihydroxylammonium-5,5′-Bistetrazole-1,1′-Diolate

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Yiping Shang ◽  
Wu Yang ◽  
Yabei Xu ◽  
Siru Pan ◽  
Huayu Wang ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Thermal Decomposition ◽  
Analysis Data ◽  
Decomposition Temperature ◽  
Thermal Excitation ◽  
Layered Semiconductor ◽  
Initial Decomposition Temperature ◽  
Thermal Decomposition Behavior ◽  
Decomposition Behavior ◽  
Catalytic Effects

In this study, few-layered tungsten disulfide (WS2) was prepared using a liquid phase exfoliation (LPE) method, and its thermal catalytic effects on an important kind of energetic salts, dihydroxylammonium-5,5′-bistetrazole-1,1′-diolate (TKX-50), were investigated. Few-layered WS2 nanosheets were obtained successfully from LPE process. And the effects of the catalytic activity of the bulk and few-layered WS2 on the thermal decomposition behavior of TKX-50 were studied by using synchronous thermal analysis (STA). Moreover, the thermal analysis data was analyzed furtherly by using the thermokinetic software AKTS. The results showed the WS2 materials had an intrinsic thermal catalysis performance for TKX-50 thermal decomposition. With the few-layered WS2 added, the initial decomposition temperature and activation energy (Ea) of TKX-50 had been decreased more efficiently. A possible thermal catalysis decomposition mechanism was proposed based on WS2. Two dimensional-layered semiconductor WS2 materials under thermal excitation can promote the primary decomposition of TKX-50 by enhancing the H-transfer progress.

scholarly journals Thermal degradation behaviour of some polydithiooxamide metal complexes

2006 ◽  
Vol 31 (1) ◽  
pp. 45-52 ◽  
Author(s):  
H. Al-Maydama ◽  
A. El-Shekeil ◽  
M. A. Khalid ◽  
A. Al-Karbouly
Keyword(s):  
Thermal Decomposition ◽  
Thermogravimetric Analysis ◽  
Integral Method ◽  
Valence Shell ◽  
Degradation Behaviour ◽  
Thermal Stabilities ◽  
Electron Pairs ◽  
Thermal Decomposition Behavior ◽  
The Difference ◽  
Decomposition Behavior

The thermal decomposition behavior of the Fe(II), Co(II), Ni(II) and Zn(II) complexes of polydithiooxamide has been investigated by thermogravimetric analysis (TGA) at a heating rate of 20°C min-1 under nitrogen. The Coats-Redfern integral method is used to evaluate the kinetic parameters for the successive steps in the decomposition sequence observed in the TGA curves. The processes of thermal decomposition taking place in the four complexes are studied comparatively as the TGA curves indicate the difference in the thermal decomposition behavior of these complexes. The thermal stabilities of these complexes are discussed in terms of repulsion among electron pairs in the valence shell of the central ion and electronegativity effects.

scholarly journals A Novel Recycling Technology of Bamboo Using NaOH

2018 ◽  
Vol 2 (5) ◽  
pp. 7-12
Author(s):  
Keyword(s):  
Thermal Decomposition ◽  
Optimum Condition ◽  
Inert Atmosphere ◽  
Bamboo Forest ◽  
Alkali Fusion ◽  
Combustible Gas ◽  
Thermal Decomposition Behavior ◽  
Recycling Technology ◽  
Decomposition Behavior ◽  
Alkali Hydroxide

The bamboo industry in Japan is declined, and disordered bamboo forests are increasing. Although maintenance of bamboo forest is needed, a large amount of bamboo wastes after logging is generated and left untreated. Therefore, new utilization of bamboo wastes after logging are desired. In this research, we aimed to develop a new recycling technology for bamboo using alkali hydroxide. By pyrolyzing bamboo using hydroxide under an inert atmosphere, thermal decomposition of organic contents and alkali fusion of silica component inside the bamboo were carried out simultaneously to recover combustible gas, charcoal and silica component. The thermal decomposition behavior of bamboo, the properties of the obtained charcoal and extraction of silica in the presence of alkali hydroxide were investigated, and the optimum condition of bamboo recycling treatment was examined. As a result, it was found that when 1 g of bamboo was pyrolyzed at higher than 500 °C with 3 g NaOH ,the almost silica was extracted, a large amount of gas generated, and a carbonized material with specific surface area of about more than 1100 m2 /g was obtained.

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