Catalytic Kinetics of Dibenzothiophene Oxidation with the Combined Catalyst of Quaternary Ammonium Bromide and Phosphotungstic Acid

2007 ◽  
Vol 46 (19) ◽  
pp. 6221-6227 ◽  
Author(s):  
Dan Huang ◽  
Yangcheng Lu ◽  
Yujun Wang ◽  
Guangsheng Luo
Keyword(s):  
Quaternary Ammonium ◽  
Phosphotungstic Acid ◽  
Ammonium Bromide ◽  
Catalytic Kinetics ◽  
Kinetics Of

Catalytic kinetics of quaternary ammonium poly(styrene-co-methylstyrene) resin

AIChE Journal ◽  
2006 ◽  
Vol 52 (7) ◽  
pp. 2535-2544 ◽  
Author(s):  
Ho-Shing Wu ◽  
Hung-Ju Lin
Keyword(s):  
Quaternary Ammonium ◽  
Catalytic Kinetics ◽  
Kinetics Of

Phase-Transfer Catalytic Kinetics of the Synthesis of Phenyl Benzoate

1995 ◽  
Vol 34 (5) ◽  
pp. 1572-1580 ◽  
Author(s):  
Yao-Sheng Lee ◽  
Mou-Yung Yeh ◽  
Yen-Ping Shih
Keyword(s):  
Phase Transfer ◽  
Phenyl Benzoate ◽  
Catalytic Kinetics ◽  
Kinetics Of

Mobility of DR1 Molecules Embedded in Nanostructured PMMA Films

2009 ◽  
Vol 5 ◽  
pp. 135-142
Author(s):  
Jorge A. García-Macedo ◽  
A. Franco ◽  
Guadalupe Valverde-Aguilar ◽  
M.A. Ríos-Enríquez
Keyword(s):  
Second Harmonic ◽  
Sodium Dodecyl ◽  
Orientation Distribution ◽  
Decay Rates ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
Poling Field ◽  
Different Temperatures ◽  
Cetyl Trimethyl Ammonium ◽  
Kinetics Of

The kinetics of the orientation of Disperse Red 1 (DR1) molecules embedded in nanostructured Polymethylmetacrylate (PMMA) films was studied under the effect of an intense constant electric poling field. The changes in the orientation distribution of the DR1 molecules were followed by Second Harmonic Generation (SHG) measurements. The SHG signal was recorded as function of time at three different temperatures. We focused on both, the signal increases under the presence of the poling field and the signal decays without the poling field. The studied PMMA films were nanostructured by the incorporation of ionic surfactants as the Sodium Dodecyl Sulfate (SDS) and the Cetyl Trimethyl Ammonium Bromide (CTAB) during their preparation. The kinds of nanostructures obtained in the films were determined by means of X-ray diffraction (XRD) measurements. Substantial differences in signal intensity and in growth and decay rates between amorphous and nanostructured films were found.

Esterification Kinetics of Phosphotungstic Acid Loaded KIT-5 Catalyzed Biodiesel Production

2018 ◽  
Vol 57 (44) ◽  
pp. 14948-14956 ◽  
Author(s):  
Dharshini D. Bala ◽  
Victor Vasquez ◽  
Dev Chidambaram
Keyword(s):  
Phosphotungstic Acid ◽  
Biodiesel Production ◽  
Kinetics Of

Glycerol as green hydrogen source for catalytic reduction over anisotropic silver nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 103471-103477 ◽  
Author(s):  
A. D. Verma ◽  
R. K. Mandal ◽  
I. Sinha
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Reduction ◽  
Nitrophenol Reduction ◽  
Catalytic Kinetics ◽  
Kinetics Of ◽  
Shape And Size

Effect of shape and size of AgNPs on the catalytic kinetics of p-nitrophenol reduction using glycerol as a hydrogen source.

Kinetics of metribuzin degradation by colloidal manganese dioxide in absence and presence of surfactants

2014 ◽  
Vol 68 (1) ◽  
Author(s):  
Qamruzzaman ◽  
Abu Nasar
Keyword(s):  
Sodium Dodecyl ◽  
Oxidative Degradation ◽  
Activation Parameters ◽  
Water Soluble ◽  
Ionic Surfactant ◽  
Ammonium Bromide ◽  
Pseudo First Order Reaction ◽  
First Order ◽  
Colloidal Mno2 ◽  
Kinetics Of

AbstractThe kinetics of the degradation of metribuzin by water-soluble colloidal MnO2 in acidic medium (HClO4) were studied spectrophotometrically in the absence and presence of surfactants. The experiments were performed under pseudo-first-order reaction conditions in respect of MnO2. The degradation was observed to be of the first order in respect of MnO2 while of fractional order for both metribuzin and HClO4. The rate constant for the degradation of metribuzin was observed to decrease as the concentration of MnO2 increased. The anionic surfactant, sodium dodecyl sulphate (SDS), was observed to be ineffective whereas the non-ionic surfactant, Triton X-100 (TX-100), accelerated the reaction rate. However, the cationic surfactant, cetyltrimethyl ammonium bromide (CTAB), caused flocculation with oppositely-charged colloidal MnO2; hence further study was not possible. The catalytic effect of TX-100 was discussed in the light of the available mathematical model. The kinetic data were exploited to generate the various activation parameters for the oxidative degradation of metribuzin by colloidal MnO2 in the absence as well as the presence of the non-ionic surfactant, TX-100.

Adsorption Kinetics of Reactive Dyes on Silk with Octyl Butyl Dimethyl Ammonium Bromide as Accelerant

2012 ◽  
Vol 549 ◽  
pp. 278-282 ◽  
Author(s):  
Cheng Chen ◽  
Guang Xian Zhang ◽  
Feng Xiu Zhang ◽  
Hui Zheng
Keyword(s):  
Adsorption Kinetics ◽  
Dye Adsorption ◽  
Reactive Dyes ◽  
Second Order ◽  
Ammonium Bromide ◽  
Order Kinetic ◽  
Dye Uptake ◽  
Dimethyl Ammonium ◽  
Adsorption Rates ◽  
Kinetics Of

With octyl butyl dimethyl ammonium bromide (OBDAB) as accelerant, adsorption kinetics of dyeing silk with three reactive dyes was studied in this paper. As concentration of OBDAB increased, the dye-uptake rate increased. The highest dye-uptake rates of three reactive dyes could reach to 89.40%~98.98% and the concentration of OBDAB was only 6-8g/L. This showed OBDAB was an effective accelerant. Pseudo first- and second-order kinetic models were used to analyze the adsorption kinetic data. The experimental data were found to follow the second-order kinetic model. Meanwhile, the initial dye adsorption rates of reactive red dye B-3BF, reactive yellow dye B-4RFN and reactive orange dye B-2RLN increased as temperature increased, and the activation energy of them were found respectively to be 28.42,13.14,32.90 kJ/mol.The positive values of and obtained indicated that reactive dyes adsorption with OBDAB as accelerant was an endothermic process. The conclusion showed OBDAB was a potential accelerant.

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