Exploring a New Method to Study the Effects of Surface Functional Groups on Adsorption of CO2 and CH4 on Activated Carbons

Langmuir ◽  
2020 ◽  
Vol 36 (14) ◽  
pp. 3862-3870 ◽  
Author(s):  
Xue Song ◽  
Li’ao Wang ◽  
Jian Gong ◽  
Xinyuan Zhan ◽  
Yunmin Zeng
Keyword(s):  
Functional Groups ◽  
Activated Carbons ◽  
New Method ◽  
Surface Functional Groups ◽  
Adsorption Of Co2

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.

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

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

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

Primary silver extraction with a high sulphur activated petroleum coke

2004 ◽  
Vol 49 (1) ◽  
pp. 155-162 ◽  
Author(s):  
R. Schouwenaars ◽  
A. Durán Moreno ◽  
R.M. Ramírez Zamora
Keyword(s):  
Functional Groups ◽  
Petroleum Coke ◽  
Activated Carbons ◽  
Specific Area ◽  
Surface Functional Groups ◽  
Agno3 Solution ◽  
Electrochemical Parameters ◽  
Petroleum Refineries ◽  
Silver Extraction

An extended study was performed to determine the mechanisms that are responsible for the significant silver extraction capacity of activated carbons prepared from a high-sulphur petroleum coke that is available as a waste material from Mexican petroleum refineries. Earlier studies had shown the feasibility of the production of these adsorbents but indicated that the mechanisms of metal adsorption in the present carbons are significantly different from what is classically accepted for commercial carbons. Therefore, selective titration, IR-spectroscopy and scanning electron microscopy of carbons were combined with adsorption experiments and the determination of electrochemical parameters of mixtures of carbon-AgNO3 solution to explain the fundamental reasons for the performance of the obtained carbons. This allowed us to determine the identity of the surface functional groups and to distinguish the effect of different activation processes. The experiments permitted us to explain why these activated carbons, which have a low specific area and lack classical surface functional groups, show such a high silver adsorption capacity.

scholarly journals Adsorption of Phenol from Aqueous Solutions on Activated Carbons with Different Oxygen Contents

1989 ◽  
Vol 6 (4) ◽  
pp. 182-191 ◽  
Author(s):  
S. Biniak ◽  
J. Kaźmièrczak ◽  
A. Swiatkowski
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Functional Groups ◽  
Activated Carbons ◽  
Principal Factor ◽  
Raw Material ◽  
Surface Functional Groups ◽  
Phenol Adsorption ◽  
Chemical Character

The effect of the chemical character of the surface of an activated carbon on phenol adsorption from aqueous solutions is described. The adsorbents used consisted of five types of activated carbon obtained by modification of the raw material. The results obtained indicate that the principal factor influencing adsorption is the oxygen contained in those surface functional groups which exhibit an acidic character. Moderately and slightly acidic groups are the most important in this context.

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