Surface functional groups and redox property of modified activated carbons

2011 ◽  
Vol 21 (2) ◽  
pp. 181-184 ◽  
Author(s):  
Zhang Xianglan ◽  
Deng Shengfu ◽  
Liu Qiong ◽  
Zhang Yan ◽  
Cheng Lei
Keyword(s):  
Functional Groups ◽  
Activated Carbons ◽  
Redox Property ◽  
Surface Functional Groups ◽  
Modified Activated Carbons

Modification of Activated Carbon and its Application on Adsorption of UDMH Gas

2013 ◽  
Vol 634-638 ◽  
pp. 1026-1030 ◽  
Author(s):  
Huan Chun Wang ◽  
Xiao Li Gou ◽  
Xiao Meng Lv
Keyword(s):  
Activated Carbon ◽  
High Temperature ◽  
Transition Metal ◽  
Surface Structure ◽  
Functional Groups ◽  
Room Temperature ◽  
Activated Carbons ◽  
Metal Solution ◽  
Modified Activated Carbons

Two kinds of modified activated carbons were prepared by dipping with Zn(NO3)2 solution and by reducing in the atmosphere of N2 at high temperature respectively, which were characterized by FTIR,DSC,SEM and EDS. The surface structure was strongly changed in the process, along with the changes of chemical functional groups. The results of adsorption experiments revealed that the adsorbent capacities of UDMH gas at room temperature were enhanced obviously by modification compared with the raw activated carbon, especially dipped by transition metal solution. The mechanism probably involved was also discussed.

scholarly journals Coffee residue-based activated carbons for phenol removal

2021 ◽  
Author(s):  
Hemavathy Palanisami ◽  
Mohamad Rafiuddin Mohd Azmi ◽  
Muhammad Abbas Ahmad Zaini ◽  
Zainul Akmar Zakaria ◽  
Muhd Nazrul Hisham Zainal Alam ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Functional Groups ◽  
High Performance ◽  
Activated Carbons ◽  
Phenol Removal ◽  
Surface Functional Groups ◽  
Maximum Capacity ◽  
Second Stage ◽  
Adsorptive Properties

Abstract This work was aimed to evaluate the adsorptive properties of activated carbons from coffee residue for phenol removal. The coffee residue was activated using H3PO4 and KOH, and the resultant activated carbons were characterized for surface area and functional groups. The values of surface area were recorded as 1,030 m2/g and 399 m2/g for H3PO4- and KOH-activated carbons, respectively. The maximum capacity for phenol removal is comparable for both activated carbons at 43 mg/g. The pores might be inaccessible due to electrostatic repulsion by surface functional groups and hydroxyl anions. The second stage in a two-stage adsorber design is necessary to accomplish the process with high performance and minimum dosage of activated carbon. Coffee residue is a promising activated carbon precursor for phenol removal.

Methane Recovery from Coal Bed Gas Using Modified Activated Carbons: A Combined Method for Assessing the Role of Functional Groups

2015 ◽  
Vol 29 (10) ◽  
pp. 6858-6865 ◽  
Author(s):  
Ziyi Li ◽  
Yingshu Liu ◽  
Chuanzhao Zhang ◽  
Xiong Yang ◽  
Jianliang Ren ◽  
...  
Keyword(s):  
Functional Groups ◽  
Activated Carbons ◽  
Coal Bed ◽  
Combined Method ◽  
Methane Recovery ◽  
Modified Activated Carbons

Adsorption of volatile sulphur compounds onto modified activated carbons: Effect of oxygen functional groups

2013 ◽  
Vol 258-259 ◽  
pp. 77-83 ◽  
Author(s):  
Esther Vega ◽  
Jesús Lemus ◽  
Alba Anfruns ◽  
Rafael Gonzalez-Olmos ◽  
José Palomar ◽  
...  
Keyword(s):  
Functional Groups ◽  
Activated Carbons ◽  
Sulphur Compounds ◽  
Oxygen Functional Groups ◽  
Volatile Sulphur Compounds ◽  
Effect Of Oxygen ◽  
Modified Activated Carbons

scholarly journals Aromatic compound adsorption from aqueous solution on activated carbons^|^#8212;Effects of adsorbate polarity and surface functional groups^|^#8212;

TANSO ◽  
2013 ◽  
Vol 2013 (257) ◽  
pp. 116-123
Author(s):  
Hiroaki Yoshida ◽  
Yoshimasa Amano ◽  
Tom Bizley ◽  
Babak Fotoohi ◽  
Louis Mercier ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Functional Groups ◽  
Aromatic Compound ◽  
Activated Carbons ◽  
Surface Functional Groups

scholarly journals Preparation of Mesoporous Activated Carbon from Jackfruit PPI-1 Waste and Development of Different Surface Functional Groups

2015 ◽  
Vol 54 ◽  
pp. 189-200
Author(s):  
T.V. Nagalakshmi ◽  
K.A. Emmanuel ◽  
Ch. Suresh Babu ◽  
Ch. Chakrapani ◽  
P. Paul Divakar
Keyword(s):  
Activated Carbon ◽  
Functional Groups ◽  
Activated Carbons ◽  
Morphological Changes ◽  
Bet Surface Area ◽  
Surface Functional Groups ◽  
Phase Oxidation ◽  
Different Temperatures ◽  
Activating Agent ◽  
Thermal Stability Of

Jackfruit PPI-1 variety was selected as source of lignocellulose material. Its rind and pulp waste was used as precursor for preparation of activated carbon. K2CO3 was selected as activating agent to prepare activated carbon. Various carbons were prepared by changing the impregnation ratio (IR) at different temperatures. Activated carbon prepared at 600°C and at IR1 had good BET surface area (987m2 g-1) and yield (61.97%). In order to introduce different functional groups, this carbon was divided into two parts. One part was subjected to liquid phase oxidation with 0.1N HNO3 and the other part was soaked in 0.1N KOH for 3hours. SEM, FTIR, TPD, XRD and TGA analyses were done to identify surface morphological changes, nature of functional groups and thermal stability of activated carbons.

Aromatic compound adsorption from aqueous solution on activated carbons: Effects of adsorbate polarity and surface functional groups

Carbon ◽  
2013 ◽  
Vol 60 ◽  
pp. 567
Author(s):  
Hiroaki Yoshida ◽  
Yoshimasa Amano ◽  
Tom Bizley ◽  
Babak Fotoohi ◽  
Louis Mercier ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Functional Groups ◽  
Aromatic Compound ◽  
Activated Carbons ◽  
Surface Functional Groups
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