STUDY PORE CHARACTERIZATION OF γ-ALUMINA – ACTIVATED CARBON COMPOSITE MADE OF CASSAVA PEELS (Manihot esculenta Cranz)

2015 ◽  
Vol 11 (1) ◽  
pp. 47
Author(s):  
Hartini Hartini ◽  
Yuniawan Hidayat ◽  
Mudjijono Mudjijono
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Total Pore Volume ◽  
Carbon Composite ◽  
Bet Method ◽  
Industrial Standards ◽  
Cassava Peels ◽  
Made In

<p>A composite of γ-alumina and activated carbon made of cassava peels was studied in terms of its pore structures and its properties. The objective of this study was to determine the interaction and structure, as well as the character and pore size of γ-alumina – activated carbon composite.</p><p>Carbon made of cassava peels was activated by H<sub>2</sub>SO<sub>4</sub> and its activities were tested according to the Indonesian Industrial Standards (SII). The addition of activated carbon into γ-alumina made in variations of 10, 20, 30, 40 and 50 % w/w, of the total weight of 10 grams. The composite of γ-alumina - activated carbon was characterized by FTIR, SAA (Surface Area Analyzer), XRD, and determination of Hysteresis Loop composites.</p>The greater addition of activated carbon to γ-alumina causes intermolecular interactions between –O-H groups form rehydrated hydrogen bonds in the composite is greater. The structure of γ-alumina in the composites remain intact although the percentage of activated carbon in composite is large. The total pore volume and surface area using the BET method of the composite decreases with increasing activated carbon percentage. The greater addition of activated carbon to γ-alumina causes size of mesoporous composites decreased with the characteristic of a composite formed is closer to the activated carbon.

scholarly journals STUDY PORE CHARACTERIZATION OF γ-ALUMINA – ACTIVATED CARBON COMPOSITE MADE OF CASSAVA PEELS (Manihot esculenta Cranz)

2016 ◽  
Vol 11 (1) ◽  
pp. 47
Author(s):  
Hartini Hartini ◽  
Yuniawan Hidayat ◽  
Mudjijono Mudjijono
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Total Pore Volume ◽  
Carbon Composite ◽  
Bet Method ◽  
Industrial Standards ◽  
Cassava Peels ◽  
Made In

<p>A composite of γ-alumina and activated carbon made of cassava peels was studied in terms of its pore structures and its properties. The objective of this study was to determine the interaction and structure, as well as the character and pore size of γ-alumina – activated carbon composite.</p><p>Carbon made of cassava peels was activated by H<sub>2</sub>SO<sub>4</sub> and its activities were tested according to the Indonesian Industrial Standards (SII). The addition of activated carbon into γ-alumina made in variations of 10, 20, 30, 40 and 50 % w/w, of the total weight of 10 grams. The composite of γ-alumina - activated carbon was characterized by FTIR, SAA (Surface Area Analyzer), XRD, and determination of Hysteresis Loop composites.</p>The greater addition of activated carbon to γ-alumina causes intermolecular interactions between –O-H groups form rehydrated hydrogen bonds in the composite is greater. The structure of γ-alumina in the composites remain intact although the percentage of activated carbon in composite is large. The total pore volume and surface area using the BET method of the composite decreases with increasing activated carbon percentage. The greater addition of activated carbon to γ-alumina causes size of mesoporous composites decreased with the characteristic of a composite formed is closer to the activated carbon.

scholarly journals Antibacterial properties of AgNO3-activated carbon composite on Escherichia coli: inhibition action

2018 ◽  
Vol 6 (1) ◽  
pp. 46
Author(s):  
Nkwaju Yanou Rachel ◽  
Baçaoui Abdelaziz ◽  
Ndi Julius Nsami ◽  
Kouotou Daouda ◽  
Yaacoubi Abdelrani ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Total Pore Volume ◽  
Carbon Composite ◽  
Micropore Volume ◽  
Bet Surface Area ◽  
Activation Temperature ◽  
X Ray ◽  
Impregnation Time ◽  
Methylene Blue Number

AgNO3- activated carbon composite based palm kernel shell was prepared by hydrothermal carbonization. The concentration of AgNO3, activation temperature and impregnation time were investigated on five responses (iodine number, methylene blue number, BET surface area, micropore volume and total pore volume). The most influential parameters of the preparation process were optimized using the Doehlert optimal design. From the ANOVA, the following optimal conditions of preparation were retained: 0.068 mol/L, 210°C and 3.7 h for AgNO3 concentration, activation temperature and impregnation time respectively. The activated carbon (AC) and the composite (AC-AgNO3) were characterized using Fourier Transform infrared spectroscopy, X-Ray diffraction, Scanning Electron Microscopy coupled to Energy Dispersive X-ray spectroscopy and measurements of the surface area. The XRD pattern and SEM-EDX clearly confirmed the presence of silver in the composite. The experimental parameters of AC- AgNO3 composite were as followed: 708.44 mg/g; 293.09 mg/g; 713.0 m2/g; 0.49 cm3/g and 0.76 cm3/g, for iodine number, methylene blue number, BET surface area, micropore volume and total pore volume of AC- AgNO3 respectively. The antibacterial test carried on Escherichia Coli showed that AC-AgNO3 composite has a high-improved antibacterial property of 99.99% fixation with a dosage of 1500 ppm for 5 hours of contact time.

Synthesis and Characterization of Mg(OH)2-Impregnated Activated Carbon Adsorbent from Coconut Shell

2019 ◽  
Vol 948 ◽  
pp. 49-53
Author(s):  
Andri Saputra ◽  
Hary Sulistyo ◽  
Deni Swantomo
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Carbon Adsorbent ◽  
Fluorescence Analysis ◽  
Coconut Shell ◽  
X Ray ◽  
Impregnation Ratio ◽  
Bet Method ◽  
Treated Carbon

Introducing or impregnating Mg(OH)2onto activated carbon is a promising path for wastewater treatment of uptake (removal) uranium from aqueous solution. The present study aims to synthesize and characterize Mg(OH)­2-impregnated activated carbon from coconut shell. The introducing or impregnating Mg(OH)2into treated biochar by activation method using various impregnation ratio (IR) of MgCl2(IR = 0.5; 1.0; 2.0). Characterization of functional groups in produced activated carbon was conducted with the aid of FTIR spectroscopy. The presence of O-H or Mg(hydroxyl) bond was confirmed by FTIR analysis at 3343.50 cm-1with the highest intensity of the obtained peak at impregnation ratio (IR) 2.0. Due to the surface area is one of the important factors that control a material’s ability to adsorb contaminations, the surface area of activated carbon was measured about 353-358 m2/g by BET method. To indicate that introducing or impregnating Mg(OH)2or Mg(hydroxyl) into treated carbon is successfully work, the presence of Mg (%w) in activated carbon was performed using X-Ray Fluorescence Analysis with the highest Mg presence about 28.587 (%w) at impregnation ratio (IR) 2.0.

Development and Characterization of Amine-Clay Hybrid Adsorbents for CO2 Capture

2016 ◽  
Vol 1133 ◽  
pp. 547-551 ◽  
Author(s):  
Ali E.I. Elkhalifah ◽  
Mohammad Azmi Bustam ◽  
Azmi Mohd Shariff ◽  
Sami Ullah ◽  
Nadia Riaz ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Surface Area ◽  
Surface Properties ◽  
Molar Mass ◽  
Adsorption Ability ◽  
Stepwise Increase ◽  
Inverse Effect ◽  
Bet Method ◽  
Sodium Form

The present work aims at a better understanding of the influences of the intercalated mono-, di- and triethanolamines on the characteristics and CO2 adsorption ability of sodium form of bentonite (Na-bentonite). The results revealed that the molar mass of intercalated amines significantly influenced the structural and surface properties as well as the CO2 adsorption capacity of Na-bentonite. In this respect, a stepwise increase in the d-spacing of Na-bentonite with the molar mass of amine was recorded by XRD technique. However, an inverse effect of the molar mass of amine on the surface area was confirmed by BET method. CO2 adsorption experiments on amine-bentonite hybrid adsorbents showed that the CO2 adsorption capacity inversly related to the molar mass of amine at 25 ͦC and 101 kPa. Accordingly, Na-bentonite modified by monoethanolammonium cations adsorbed as high as 0.475 mmol CO2/g compared to 0.148 and 0.087 mmol CO2/g for that one treated with di- and triethanolammonium cations, respectively.

Improved Capacitive Behavior of Birnessite Type Mn Oxide Coated on Activated Carbon Fibers

2021 ◽  
Author(s):  
Zahra Abedi ◽  
Desiree Leistenschneider ◽  
Douglas Ivey ◽  
Weixing Chen
Keyword(s):  
Activated Carbon ◽  
Carbon Fibers ◽  
Hydrothermal Process ◽  
Total Pore Volume ◽  
Annealing Process ◽  
Activated Carbon Fibers ◽  
Capacitive Behavior ◽  
Mn Oxide ◽  
Reducing Environment

Abstract Birnessite type Mn oxide (potassium birnessite hydrate) powder (as-δ-MnO2) with a layered microstructure was prepared via a hydrothermal process. To improve its capacitive performance, the microstructure was thermally modified (annealed) at 400 oC (400-δ-MnO2) in a N2 reducing environment. By removing the hydrated cations (K+) layers inserted between the main layers of birnessite, damaging the microstructure, intercalation/deintercalation of the electrolyte species (Li+1) became more effective. Characterization of as-δ-MnO2 and 400-δ-MnO2 revealed that no phase transformation occurred during the annealing process. The microstructure became less crystalline and the total pore volume increased from 0.20 cm3 g-1 to 0.43 cm3 g-1, while the oxidation state of Mn remained 4+ after annealing the as-δ-MnO2 at 400 oC. The 400-δ-MnO2 sample was then coated on asphaltene derived activated carbon fibers (ACF-400-δ-MnO2) to improve the performance by making use of the high electrical conductivity and capacitive behavior of ACF. Coating the 400-δ-MnO2 sample led to a significant increase in the capacitance (328 F g-1 and 195 F g-1 for ACF-400-δ-MnO2 and 400-δ-MnO2 at 0.4 A g-1, respectively), improved energy and power values (~7 kW kg-1 at ~4.2 Wh kg-1 for ACF-400-δ-MnO2 and 240 W kg-1 at 2.4 Wh kg-1 for 400-δ-MnO2) and improved cycling behavior.

scholarly journals Preparation and characterization of activated carbons from albizia saman pod

2017 ◽  
Vol 36 (3) ◽  
pp. 44-53
Author(s):  
G. D. Akpen ◽  
M. I. Aho ◽  
N. Baba
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Activated Carbons ◽  
High Surface ◽  
High Surface Area ◽  
Volatile Matter ◽  
Sieve Analysis ◽  
Albizia Saman ◽  
Temperature Surface

Activated carbon was prepared from the pods of Albizia saman for the purpose of converting the waste to wealth. The pods were thoroughly washed with water to remove any dirt, air- dried and cut into sizes of 2-4 cm. The prepared pods were then carbonised in a muffle furnace at temperatures of 4000C, 5000C, 6000C ,7000C and 8000C for 30 minutes. The same procedure was repeated for 60, 90, 120 and 150 minutes respectively. Activation was done using impregnationratios of 1:12, 1:6, 1:4, 1:3, and 1:2 respectively of ZnCl2 to carbonised Albizia saman pods by weight. The activated carbon was then dried in an oven at 1050C before crushing for sieve analysis. The following properties of the produced Albizia saman pod activated carbon (ASPAC) were determined: bulk density, carbon yield, surface area and ash, volatile matter and moisture contents. The highest surface area of 1479.29 m2/g was obtained at the optimum impregnation ratio, carbonization time and temperature of 1:6, 60 minutes and 5000C respectively. It was recommended that activated carbon should be prepared from Albizia saman pod with high potential for adsorption of pollutants given the high surface area obtained.Keywords: Albizia saman pod, activated carbon, carbonization, temperature, surface area

SBA-15 Molecular Sieve Using Clay as Silicon Sources

2014 ◽  
Vol 798-799 ◽  
pp. 116-120 ◽  
Author(s):  
Gustavo Medeiros de Paula ◽  
L.A. Lima ◽  
Meiry Glaúcia Freire Rodrigues
Keyword(s):  
Surface Area ◽  
Great Reduction ◽  
Molecular Sieve ◽  
Total Pore Volume ◽  
Synthesis And Characterization ◽  
Alternative Source ◽  
Research Teams ◽  
Silica Source ◽  
Silicon Sources

New sources of silica as a replacement for TEOS in the synthesis of SBA-15 are been performed by various research teams worldwide. The aim of this work is to describe the synthesis and characterization of SBA-15 made with chocolate B clay as an alternative source of silica by the hydrothermal method. Samples of classic SBA-15 were made with the traditional TEOS method. The samples of the two silica sources were characterized by DRX, EDX, and BET to evaluate the effects of the silica source on the synthesis of the molecular sieve. The chocolate B clay was efficient in the formation of the molecular sieve structure, but there was a great reduction in the surface area and total pore volume in comparison to the surface area of classic SBA-15.

The determination of the surface area of silica by laser Raman spectroscopy

1976 ◽  
Vol 29 (3) ◽  
pp. 507 ◽  
Author(s):  
RP Cooney ◽  
NT Tam
Keyword(s):  
Raman Spectroscopy ◽  
Raman Spectrum ◽  
Surface Area ◽  
Surface Coverage ◽  
Silica Surface ◽  
Quantitative Agreement ◽  
Laser Raman Spectroscopy ◽  
Laser Raman ◽  
Bet Method

Changes in the Raman spectrum of pyridine on a silica surface with increasing surface coverage may be used to determine the monolayer capacity. The method, which is independent of the BET method, produces a result which is in quantitative agreement with the BET result.

Characterization of Activated Carbon from Sugar Cane Husk

2014 ◽  
Vol 699 ◽  
pp. 1006-1011
Author(s):  
Nurul’ Ain binti Jamion ◽  
Siti Mazleena binti Mohamed
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Sugar Cane ◽  
Single Point ◽  
Gravimetric Method ◽  
Bet Surface Area ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Physico Chemical ◽  
Vacuum Method

Interface adsorption of gases and liquid on a clean solid surface could be due to the physical or chemical adsorption. In this study, the activated carbon was prepared from sugar cane husk (powder and granular form) using phosphoric acid (H3PO4) as activating agent. Sample was activated at 500°C for two hours in the furnace and washed using vacuum method. Besides, surface area of activated carbon was defined using Single Point Brunauer-Emmett-Teller (BET) Nitrogen Gas. The physico-chemical characteristics of the prepared activated carbon were characterized by Fourier-Transformed Infrared Spectroscopy (FTIR), gravimetric method, and Field Emission Scanning Electron Microscopy (FESEM). The adsorption study by surfactants, namely CTAB (cationic) and TX-100 (non-ionic) were investigated. The experimental results showed that a good activated carbon was prepared from sugar cane husk granular (SCH-G) gave the highest BET surface area of 860.18 m2/g and the adsorption capacity of SCH-G activated carbon at 25°C using TX-100 (205.81 mg g-1) was greater compared to the CTAB (108.20 mg g-1). This study has shown that the sugar cane husk was a good activated carbon and has potential to be used as adsorbent for the removal of surfactants from aqueous solutions.

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