The Production of Activated Carbons Using Greek Lignites by Physical and Chemical Activation Methods: A Comparative Study

2011 ◽  
Vol 33 (8) ◽  
pp. 713-723 ◽  
Author(s):  
N. Pasadakis ◽  
G. Romanos ◽  
V. Perdikatsis ◽  
A. E. Foscolos
Keyword(s):  
Comparative Study ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Physical And Chemical

A comparative study of physical and chemical activation of rice straw derived biochar to enhance Zn+2 adsorption

2021 ◽  
pp. 100774
Author(s):  
Anil Kumar Sakhiya ◽  
Paramjeet Baghel ◽  
Abhijeet Anand ◽  
Virendra Kumar Vijay ◽  
Priyanka Kaushal
Keyword(s):  
Comparative Study ◽  
Rice Straw ◽  
Chemical Activation ◽  
Physical And Chemical

Comparative Study of Different Activation Treatments for the Preparation of Activated Carbon: A Mini-Review

2017 ◽  
Vol 100 (3) ◽  
pp. 299-312 ◽  
Author(s):  
Muhammad Imran Din ◽  
Sania Ashraf ◽  
Azeem Intisar
Keyword(s):  
Activated Carbon ◽  
Comparative Study ◽  
Raw Materials ◽  
Chemical Activation ◽  
Comparative Approach ◽  
Adsorption Mechanisms ◽  
Temperature Activation ◽  
Activation Conditions ◽  
Physical And Chemical ◽  
Characterisation Techniques

In this review, various methods of preparation of activated carbon from agricultural and commercial waste material are reviewed. In addition, we also discuss various activation treatments using a comparative approach. The data are organised in tabulated form for ease of comparative study. A review of numerous characterisation techniques is also provided. The effect of time and temperature, activation conditions, carbonisation conditions and impregnation ratios are explained and several physical and chemical activation treatments of raw materials and their impact on the micro- and mesoporous volumes and surface area are discussed. Lastly, a review of adsorption mechanisms of activated carbon (AC) is also provided.

Physical and Chemical Activation Effect on Activated Carbon Prepared from Local Pineapple Waste

2014 ◽  
Vol 699 ◽  
pp. 87-92 ◽  
Author(s):  
Abdul Rahim Yacob ◽  
Adlina Azmi ◽  
Mohd Khairul Asyraf Amat Mustajab
Keyword(s):  
Activated Carbon ◽  
Phosphoric Acid ◽  
Surface Area ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Bet Surface Area ◽  
Activation Effect ◽  
Pineapple Waste ◽  
Pineapple Peel ◽  
Physical And Chemical

The characteristics and quality of activated carbons prepared depending on the chemical and physical properties of the starting materials and the activation method used. In this study, activated carbon prepared using pineapple waste. Three parts of pineapple waste which comprises of peel, crown and leaf were studied. For comparison activated carbon were prepared by both physical and chemical activation respectively. Three types of chemicals were used, phosphoric acid (H3PO4), sulphuric acid (H2SO4), and potassium hydroxide (KOH). The preparation includes carbonization at 200°C and activation at the 400°C using muffle furnace. The chemical characterization of the activated carbon was carried out using Thermogravimetric analysis (TGA), Nitrogen gas adsorption analysis and Fourier transform infrared (FTIR). The highest BET surface area was achieved when the pineapple peel soaked in 20% phosphoric acid with a surface area of 1115 m2g-1. FTIR analysis indicates that the reacted pineapple waste successfully converted into activated carbons.

Comparative Evaluation of Activated Carbons Prepared by Thermo-Chemical Activation of Lignocellulosic Residues Aiming at Phenol Removal

2014 ◽  
Vol 1016 ◽  
pp. 309-314 ◽  
Author(s):  
Cibele C.O. Alves ◽  
Adriana S. Franca ◽  
Leandro S. Oliveira
Keyword(s):  
Comparative Evaluation ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Maximum Adsorption Capacity ◽  
Phenol Removal ◽  
Spent Coffee Grounds ◽  
Lignocellulosic Residues ◽  
Precursor Material ◽  
Coffee Grounds ◽  
Physical And Chemical

This paper presents a comparative evaluation of three lignocellulosic residues (coffee husks, spent coffee grounds and pequi husks) as precursor materials in the production of activated carbons (ACs). Results indicate that the precursor material has a significant effect in both physical and chemical aspects of the adsorbent, with the AC based on spent coffee grounds being the most effective for phenol removal, with maximum adsorption capacity comparable to commercial ACs.

Removal of phenol and phosphate from aqueous solutions using activated carbons prepared from oily sludge through physical and chemical activation

2019 ◽  
Vol 80 (3) ◽  
pp. 575-586 ◽  
Author(s):  
Niloofar Mojoudi ◽  
Mohsen Soleimani ◽  
Nourollah Mirghaffari ◽  
Carolina Belver ◽  
Jorge Bedia
Keyword(s):  
Iodine Number ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Polluted Water ◽  
Infrared Spectrometry ◽  
Oily Sludge ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Physical And Chemical

Abstract Preparation and characterization of activated carbons (ACs) from oily sludge by physical and chemical activation using steam, ZnCl2 and FeCl3 were investigated. The characteristics of produced adsorbents were determined by iodine number, Brunauer–Emmett–Teller (BET) equation, Fourier transform infrared spectrometry and scanning electron microscopy analyses. Batch adsorption experiments for phenol and phosphate were performed to evaluate the efficiency of adsorbents. The optimum porous structure of adsorbents with a BET surface area of 1,259 m2 g−1, total pore volume of 1.22 cm3 g−1 and iodine number of 994 mg g−1 was achieved by ZnCl2 activation at 500 °C and impregnation ratio of 1:1. The adsorption data were well fitted to the pseudo-second-order kinetic model (R2>0.99) and Freundlich isotherm (R2>0.99). The maximum adsorption capacity of phenol (238 mg g−1) and phosphate (102 mg g−1) based on the Langmuir model was achieved at pH of 6.0 and adsorbent dose of 1 g L−1. Thermodynamic parameters were negative and showed that adsorption of phenol and phosphate onto the AC was feasible, spontaneous and exothermic. The results suggested that prepared AC was an effective adsorbent for removal of phenol and phosphate ions from the polluted water.

scholarly journals Preparation and Characterization of Activated Carbons fromPartheniumbiomass by Physical and Chemical Activation Techniques

2010 ◽  
Vol 7 (4) ◽  
pp. 1314-1319 ◽  
Author(s):  
Rajeshwari Sivaraj ◽  
Venckatesh Rajendran ◽  
G. Sangeetha Gunalan
Keyword(s):  
Activated Carbons ◽  
Chemical Activation ◽  
Perennial Weed ◽  
Food Grains ◽  
Characteristic Features ◽  
Activation Conditions ◽  
Physical And Chemical ◽  
Efficient Adsorbent ◽  
Potential Use

Parthenium hysterphorous(Linn), a perennial weed of no known beneficial use was introduced as a containment of food grains imported from US with P1480 scheme. The colonization efficiency of the weed was much higher than other indigenous weeds resulting in the reduction of cultivable areas of agricultural lands. Therefore, attention was focused to find out the potential use of its biomass. In the present study the preparation and characterization of activated carbons by physical and chemical activation methods are reported and aims to prepare relatively well developed porous activated carbons as well as study various conditions and parameters that were involved during the process. Among the carbons prepared Zncl2impregnated carbon at the ratio of 1 was found to possess the characteristic features of an efficient adsorbent. Experimental results showed that pyrolytic and activation conditions leading to various final average temperatures had significant effect on the properties of activated carbons prepared.

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