Non-Isothermal Kinetics of Reduction Reaction of Oxidized Pellet Under Microwave Irradiation

2012 ◽  
Vol 19 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Zhu-cheng Huang ◽  
Kai Wu ◽  
Bing Hu ◽  
Hu Peng ◽  
Tao Jiang
Keyword(s):  
Microwave Irradiation ◽  
Reduction Reaction ◽  
Isothermal Kinetics ◽  
Oxidized Pellet ◽  
Kinetics Of ◽  
Kinetics Of Reduction

Isothermal kinetics of reduction and carburization of WO3–NiO nanocomposite powder by CO/CO2

2016 ◽  
Vol 128 (1) ◽  
pp. 553-566 ◽  
Author(s):  
Hurieh Mohammadzadeh Valendar ◽  
Dawei Yu ◽  
Mansoor Barati ◽  
HamidReza Rezaie
Keyword(s):  
Isothermal Kinetics ◽  
Nanocomposite Powder ◽  
Kinetics Of ◽  
Kinetics Of Reduction

scholarly journals Recovery Of Valuable Metals In Tin-Based Anodic Slimes By Carbothermic Reaction

2015 ◽  
Vol 60 (2) ◽  
pp. 1213-1216 ◽  
Author(s):  
Chulwoong Han ◽  
Young-Min Kim ◽  
Seong Ho Son ◽  
Hanshin Choi ◽  
Tae Bum Kim ◽  
...  
Keyword(s):  
Thermodynamic Calculation ◽  
Reduction Reaction ◽  
Weight Loss Measurement ◽  
Loss Measurement ◽  
Electrolytic Cells ◽  
Valuable Metals ◽  
Lead Oxides ◽  
Tin Silver Copper ◽  
Kinetics Of ◽  
Kinetics Of Reduction

Abstract This study investigated the recovery of anodic slimes by carbothermic reaction in the temperature range of 973~1,273K and amount of carbon as a function of time. Tin anodic slime samples were collected from the bottom of the electrolytic cells during the electro-refining of tin. The anodic slimes are consisted of high concentrated tin, silver, copper and lead oxides. The kinetics of reduction were determined by means of the weight-loss measurement technique. In order to understand in detail of carbothermic reaction, thermodynamic calculation was carried out and compared with experiments. From thermodynamic calculation and experiment, it was confirmed that Sn-based anodic slime could be reduced by controlling temperature and amount of carbon. However, any tendency between the reduction temperature and carbon content for the reduction reaction was not observed.

Kinetics of Reduction Reaction in Micro-Fluidized Bed

2012 ◽  
Vol 19 (6) ◽  
pp. 6-8 ◽  
Author(s):  
Yin-he Lin ◽  
Zhan-cheng Guo ◽  
Hui-qing Tang ◽  
Shan Ren ◽  
Jing-wei Li
Keyword(s):  
Fluidized Bed ◽  
Reduction Reaction ◽  
Kinetics Of ◽  
Kinetics Of Reduction

Non-isothermal Kinetics of Free Radical Polymerization of 2-Phenylethyl (Meth)acrylate

2018 ◽  
Vol 8 (3) ◽  
pp. 585-594
Author(s):  
Khdbudin Mulani ◽  
Ravindra Ghorpade ◽  
Surendra Ponrathnam ◽  
Nayaku Chavan ◽  
Kamini Donde
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Isothermal Kinetics ◽  
Kinetics Of

The effect of origin and physico-chemical properties on the kinetics of reduction of mixed NiO-Fe2O3 oxides with hydrogen

1986 ◽  
Vol 51 (10) ◽  
pp. 2098-2108 ◽  
Author(s):  
Milan Pospíšil ◽  
Jan Topinka
Keyword(s):  
Mixed Oxides ◽  
Mutual Influence ◽  
Spinel Phase ◽  
Chemical Properties ◽  
Inhibitory Effect ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Preliminary Annealing ◽  
Kinetics Of ◽  
Kinetics Of Reduction

We investigated the effect of origin and some physico-chemical parameters on the kinetics of reduction with hydrogen of two series of mixed NiO-Fe2O3 oxides differing by their composition, the character of their precursors (mixed crystalline nitrates and coprecipitated hydroxides) and their decomposition temperature.This effect manifested itself by different magnitudes of specific surfaces of the mixed oxides and coherent regions of present phases as well as by different oxidizing abilities of the surface and differences in morphology and phase composition of corresponding samples in both series investigated. Nonlinear or nonmonotonous composition dependences of physico-chemical parameters investigated point to a mutual influence of individual components, which is also a function of the system origin and which modifies its reactivity during its reduction with hydrogen. The kinetics of the reduction was studied thermogravimetrically at 320-410 °C. The reduction of oxides of the hydroxide origin is catalytically accelerated by primarily reduced nickel, whereas in corresponding samples of the nitrate series, the total NiO is bound to the spinel phase and the reduction is delayed. Experimental IR spectra, the effect of preliminary annealing and DTA of the mixed oxides point to an inhibitory effect of water, which is constitutionally bound in trace admixtures of the goethite phase, on the kinetics of reduction of samples in the hydroxide series.

In-situ stabilization of silver nanoparticles in polymer hydrogels for enhanced catalytic reduction of macro and micro pollutants

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Luqman Ali Shah ◽  
Rida Javed ◽  
Mohammad Siddiq ◽  
Iram BiBi ◽  
Ishrat Jamil ◽  
...  
Keyword(s):  
Catalytic Reduction ◽  
Thermo Gravimetric Analysis ◽  
Activation Parameters ◽  
Reduction Reaction ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
In Situ Stabilization ◽  
Hybrid Hydrogels ◽  
Kinetics Of

AbstractThe in-situ stabilization of Ag nanoparticles is carried out by the use of reducing agent and synthesized three different types of hydrogen (anionic, cationic, and neutral) template. The morphology, constitution and thermal stability of the synthesized pure and Ag-entrapped hybrid hydrogels were efficiently confirmed using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and thermo gravimetric analysis (TGA). The prepared hybrid hydrogels were used in the decolorization of methylene blue (MB) and azo dyes congo red (CR), methyl Orange (MO), and reduction of 4-nitrophenol (4-NP) and nitrobenzene (NB) by an electron donor NaBH4. The kinetics of the reduction reaction was also assessed to determine the activation parameters. The hybrid hydrogen catalysts were recovered by filtration and used continuously up to six times with 98% conversion of pollutants without substantial loss in catalytic activity. It was observed that these types of hydrogel systems can be used for the conversion of pollutants from waste water into useful products.

Isobaric and isothermal kinetics of gelatinization of waxy maize starch

2007 ◽  
Vol 82 (4) ◽  
pp. 443-449 ◽  
Author(s):  
Shyam S. Sablani ◽  
S. Kasapis ◽  
Z.H. Al-Tarqe ◽  
I. Al-Marhubi ◽  
M. Al-Khuseibi ◽  
...  
Keyword(s):  
Isothermal Kinetics ◽  
Maize Starch ◽  
Waxy Maize ◽  
Kinetics Of
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