scholarly journals Sorption Properties of Methyl Orange onto Chemically Modified Chitosan: Thermodynamics and Kinetics Studies

2017 ◽  
Vol 2 (1) ◽  
pp. 1-9
Author(s):  
Juliana CM Caje ◽  
Paula Marcelle de Oliveira ◽  
Felipe S Semaan ◽  
Raphael C Cruz ◽  
Ricardo J. Cassella ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Sorption Properties ◽  
Modified Chitosan ◽  
Chemically Modified ◽  
Kinetics Studies ◽  
Thermodynamics And Kinetics

scholarly journals Chemical modification of the polymer of intrinsic microporosity PIM-1 for enhanced hydrogen storage

Adsorption ◽  
2020 ◽  
Vol 26 (7) ◽  
pp. 1083-1091
Author(s):  
Mi Tian ◽  
Sébastien Rochat ◽  
Hamish Fawcett ◽  
Andrew D. Burrows ◽  
Christopher R. Bowen ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Surface Area ◽  
Hydrogen Adsorption ◽  
Sorption Properties ◽  
Bet Surface Area ◽  
Polymer Modification ◽  
Gas Sorption ◽  
Chemically Modified ◽  
Polymer Of Intrinsic Microporosity ◽  
Intrinsic Microporosity

Abstract A detailed investigation has been carried out of the pre-polymerisation modification of the polymer of intrinsic microporosity PIM-1 by the addition of two methyl (Me) groups to its spirobisindane unit to create a new chemically modified PIM-1 analogue, termed MePIM. Our work explores the effects of this modification on the porosity of PIM-1 and hence on its gas sorption properties. MePIM was successfully synthesised using either low (338 K) or high (423 K) temperature syntheses. It was observed that introduction of methyl groups to the spirobisindane part of PIM-1 generates additional microporous spaces, which significantly increases both surface area and hydrogen storage capacity. The BET surface area (N2 at 77 K) was increased by ~ 12.5%, resulting in a ~ 25% increase of hydrogen adsorption after modification. MePIM also maintains the advantages of good processability and thermal stability. This work provides new insights on a facile polymer modification that enables enhanced gas sorption properties.

Kinetics Studies for Catalytic Oxidation of Methyl Orange over the Heterogeneous Fe/Beta Catalysts

2013 ◽  
Vol 807-809 ◽  
pp. 361-364
Author(s):  
Fang Guo ◽  
Jun Qiang Xu ◽  
Jun Li
Keyword(s):  
Activation Energy ◽  
Hydrogen Peroxide ◽  
Reaction Mechanism ◽  
Methyl Orange ◽  
Incipient Wetness Impregnation ◽  
Kinetics Studies ◽  
Optimum Reaction ◽  
Catalyst Dosage ◽  
Oxidation Degradation ◽  
Degradation Of Methyl Orange

The Fe/Beta catalysts were prepared by conventional incipient wetness impregnation. The catalysis oxidation degradation of methyl orange was carried out in catalyst and H2O2 process. The results indicated that the catalyst and hydrogen peroxide were more benefit to degradation of methyl orange. The reaction condition was optimized. The optimum reaction process was as follow: iron amount of catalyst was 1.25%, the catalyst dosage and H2O2 concentration was 1 mg/L and 1.5 mg/L, and reaction temperature was 70 °C. The apparent activation energy (65 KJ/mol) was obtained according to the arrhenius formula, which was benefit to study the reaction mechanism.

Synthesis of chemically modified chitosan with 2,5-dimercapto-1,3,4-thiodiazole and its adsorption abilities for Au(III), Pd(II), and Pt(IV)

2009 ◽  
Vol 113 (3) ◽  
pp. 1604-1610 ◽  
Author(s):  
Fei Li ◽  
Changli Bao ◽  
Jianhui Zhang ◽  
Qi Sun ◽  
Weiwei Kong ◽  
...  
Keyword(s):  
Modified Chitosan ◽  
Chemically Modified

scholarly journals Application of Chemically Modified Chitosan for Removal of Arsenic from Water: A Column Bed Experiment

2019 ◽  
Vol 8 (06) ◽  
pp. 2893-2902
Author(s):  
Ashutosh Kumar Singh ◽  
S.P. Shukla ◽  
Saurav Kumar ◽  
Priyanka Sahu ◽  
Neeraj Kumar
Keyword(s):  
Modified Chitosan ◽  
Chemically Modified ◽  
Removal Of Arsenic
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