scholarly journals Activated carbon from cassava peel: A promising electrode material for supercapacitors

2020 ◽  
Author(s):  
Julie Ospino-Orozco ◽  
Juliana Parra-Barraza ◽  
Sigifredo Cervera-Cahuana ◽  
Euler Eugenio Coral-Escobar ◽  
Oscar Vargas-Ceballos
Keyword(s):  
Cyclic Voltammetry ◽  
Activated Carbon ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Electrode System ◽  
Electrolytic Solution ◽  
Galvanostatic Charge ◽  
Electrical Pulses ◽  
Cassava Peels ◽  
Cassava Peel

Supercapacitors are common devices in electrical circuits that produce electrical pulses at high power levels in short periods of time. Electrodes for supercapacitors were prepared with activated carbon. Activated carbon was obtained from cassava peels treated by chemical activation with potassium hydroxide (KOH) and phosphoric acid (H3PO4), each at two different concentrations and at one carbonization temperature. Electrochemical performance of the prepared electrodes was obtained by means of cyclic voltammetry and galvanostatic charge-discharge in a 3-electrode system with an electrolytic solution of sulfuric acid (H2SO4) 1 M. Cyclic voltammetry allowed to indentify a behavior of supercapacitors in a potential window of -0.4V to 0.6V. Activated carbon derived from cassava peel with the highest specific surface area (398.46 m2/g) has exhibited the maximum specific capacitance of 64.18 F/g.

scholarly journals PENGARUH PENAMBAHAN KARBON AKTIF DARI KULIT SINGKONG TERHADAP PENURUNAN KADAR MANGAN (Mn) DALAM AIR DENGAN BEBERAPA VARIASI KONSENTRASI

2019 ◽  
Vol 7 (2) ◽  
pp. 96
Author(s):  
Darmawati Darmawati ◽  
Syarifah Maulidar ◽  
Khairun Nisa
Keyword(s):  
Activated Carbon ◽  
Spectrophotometric Method ◽  
Carbon Concentration ◽  
Raw Material ◽  
Manganese Concentration ◽  
Manganese Reduction ◽  
Cassava Peels ◽  
Cassava Peel ◽  
Banda Aceh

The study aims to find out about the possibility of utilizing cassava peel waste as raw material for making activated carbon to reduce levels of Manganese in water. This study also wants to see the effect of variations in the concentration of activated carbon from cassava peels on decreasing levels of Manganese in water. This research was conducted at the Laboratory of the Akademi Analis Kesehatan Pemerintah Aceh and at the UPTD Laboratorium Kesehatan Banda Aceh on 3-11 March 2016. Manganese was analysed using the persulfate method while the Manganese was examinated by the spectrophotometric method. The sample used is an artificial sample by adding MnSO4 to water. The variation of activated carbon concentration added is 2 gr, 3 gr, and 4 gr. The results are that with the addition of 2 grams of activated carbon the percentage of Manganese reduction was 70.37%, the addition of 3 grams of activated carbon decreased Manganese concentration by 86.59%, while the addition of 4 grams of activated carbon reduced the percentage of Manganese to 92.33%. It can be concluded that the higher the concentration of activated carbon added, the higher the decrease in levels of Manganese in the water.

Preparation of Activated Carbon from Durian Shell and Seed

2012 ◽  
Vol 626 ◽  
pp. 887-891 ◽  
Author(s):  
Mohd Fikri Mokhtar ◽  
Erny Haslina Abd Latib ◽  
Suriati Sufian ◽  
Ku Zilati Ku Shaari
Keyword(s):  
Activated Carbon ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Physical Characteristics ◽  
Carbonization Temperature ◽  
Nitrogen Flow ◽  
Carbonization Process ◽  
Duration Time ◽  
Activating Agent ◽  
Durian Seed

This study presents the preparation of activated carbon from durian shell (DShAC) and durian seed (DSeAC) based by chemical activation with potassium hydroxide (KOH) as an activating agent under the nitrogen flow. In order to find the optimum physical characteristics, variation in concentration of KOH, carbonization temperature and duration time was employed. The result shows that activated carbon from durian waste is a promising activated carbon as the highest yield was obtained from the carbonization process that occurs at 400C for four hours with the KOH concentration is 0.6 M.

Catalytic activation and application of micro-spherical carbon derived from hydrothermal carbonization of lignocellulosic biomass: statistical analysis using Box–Behnken design

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102680-102694 ◽  
Author(s):  
Z. Z. Chowdhury ◽  
S. B. Abd Hamid ◽  
Md. M. Rahman ◽  
R. F. Rafique
Keyword(s):  
Activated Carbon ◽  
Statistical Analysis ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Hydrothermal Carbonization ◽  
Corchorus Olitorius ◽  
Box Behnken Design ◽  
Catalytic Activation ◽  
Spherical Carbon ◽  
Physico Chemical

Activated carbon was produced by physico-chemical activation of hydrothermally carbonized dried stem derived from Corchorus olitorius, commonly known as Jute (JS), using potassium hydroxide (KOH) as an activation agent.

Template Synthesis of Activated Carbon for Supercapacitor

2010 ◽  
Vol 663-665 ◽  
pp. 568-571
Author(s):  
Ren Qing Wang ◽  
Qin Fang ◽  
Mei Gen Deng
Keyword(s):  
Cyclic Voltammetry ◽  
Activated Carbon ◽  
Phenolic Resin ◽  
Tween 80 ◽  
Galvanostatic Charge ◽  
N2 Adsorption ◽  
Power Property ◽  
Capacitance Characteristics ◽  
A Current ◽  
Charge Discharge

Activated carbon was fabricated by using phenolic resin as carbon source, tween-80 as organic template, KOH as activator. The samples were analyzed by N2 adsorption, scanning electron microscopy (SEM). Cyclic voltammetry and galvanostatic charge-discharge were used to characterize the electrochemical performance of the samples. The results showed that specific surface area of the prepared sample was 1935.99 m2/g, pore size was mainly in the range of 1.0～4.0 nm and showed typical capacitance characteristics in cyclic voltammetry. At a current density of 15mA/cm2, a specific capacitance of 246.18F/g was achieved and the resistance was 1.11Ω. Supercapacitors based on the sample had low ESR and excellent power property.

High surface area activated carbon prepared from cassava peel by chemical activation

2006 ◽  
Vol 97 (5) ◽  
pp. 734-739 ◽  
Author(s):  
Y. Sudaryanto ◽  
S.B. Hartono ◽  
W. Irawaty ◽  
H. Hindarso ◽  
S. Ismadji
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Chemical Activation ◽  
High Surface ◽  
High Surface Area ◽  
Cassava Peel

scholarly journals Utilization of Cassava Rods Waste as Active Charcoal and The Effect of HCl Activator and Activation Time on Active Charcoal

2019 ◽  
Vol 14 (2) ◽  
pp. 77-81
Author(s):  
Yuni Ambarwati
Keyword(s):  
Activated Carbon ◽  
Activated Charcoal ◽  
Chemical Activation ◽  
Raw Material ◽  
Active Charcoal ◽  
Activation Time ◽  
Cassava Stem ◽  
The Right ◽  
Cassava Peel ◽  
Very High

Some research proved that activated carbon could be made from organic materials or anorganic material with very high carbon content. The exist research of activated carbon from coconut shell, bagasse, cassava peel. In fact, there are a lot of material can be used as raw material, like cassava rods wastebecause the amount is very abundant and has not been widely used. This research aims toreceive the right conditionsin the manufacture of activated charcoal from cassava stem wastewith variations in concentration and time of activationwith chemical activation methodsusing a hydrochloric acid activatorto obtain activated charcoal products that fulfill the standards. Making activated charcoal begins withdehydrate the stem in the sun for around 2 days. The second is make cassava charcoal by installing a series of clinker drum cassava stems. The third is charcoal stem activationwith the size 100 mesh, mix charcoal with Hydrochloric Acidinto erlenmeyerwith concentration 1,5N; 2N; 2,5N; 3N; and 3,5Nthen stir with Heating Magnetic Stirrer, 105 ºC, during 2,5 hours, 3 hours, 3,5 hours, 4 hours, 4,5 hours. The results obtained by the best active charcoalat concentration3 Nwith activation time 4,5 hours, ash content 0.8%, andabsorption of iodine 399,67 mg/g.

scholarly journals Optimization of the Activated Carbon Preparation from Avocado Seeds, using the Response Surface Methodology

2019 ◽  
Vol 70 (2) ◽  
pp. 410-416 ◽  
Author(s):  
Tagne Tiegam Rufis Fregue ◽  
Ioana Ionel ◽  
Anagho Solomon Gabche ◽  
Alin-Cristian Mihaiuti
Keyword(s):  
Response Surface Methodology ◽  
Activated Carbon ◽  
Response Surface ◽  
Calcination Temperature ◽  
Potassium Hydroxide ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Activating Agent ◽  
Electronic Microscope ◽  
Significant Factors

Avocado seeds based activated carbon was prepared using chemical activation method which consisted of potassium hydroxide treatment. The main factors influencing the preparation of activated carbons at the calcination temperature, the concentration of the activating agent and the duration of calcination were investigated. One used as a mathematical model the response surface methodology to correlate the response. The significant factors identified by the analysis of variance (ANOVA) through the t-test, the Pareto diagram and the diagrams of surfaces. The optimum avocado seeds based activated carbon was obtained by using calcination temperature of 450 oC, concentration of activating agent of 0.3 mol/L and time of calcination of 3.0 h, which resulted to an avocado seed based activated carbon iodine number remove of 1142.1 mg/g and yield of 75.09 %, by mass. The best activated carbon obtained under the previous conditions and the raw biomass was characterized by Fourier transform infrared and Scanning Electronic Microscope.

Fabrication of Activated Carbon Fibers from Stabilized PAN-Based Fibers by KOH

2004 ◽  
Vol 449-452 ◽  
pp. 217-220 ◽  
Author(s):  
Young Jae Lee ◽  
Jae Hyung Kim ◽  
Jang Soon Kim ◽  
Dong Bok Lee ◽  
Jae Chun Lee ◽  
...  
Keyword(s):  
Experimental Data ◽  
Activated Carbon ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Carbon Fibers ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Activated Carbon Fibers ◽  
High Concentration

Activated carbon fibers were prepared from stabilized PAN-based fibers by chemical activation using potassium hydroxide at different concentration. The experimental data showed variations in specific surface area, microstructure by the activated carbon fibers. Specific surface area of about 2545 m2/g was obtained in the KOH/stabilized PAN-based fiber ratio of 1:1 at 800°. An abrupt reduction of specific surface area was observed in the experiments with the ratio of 3:1 of OH/stabilized PAN-based fiber, being dissimilar with the result of KOH/fiber ratios of 1:1 and 2:1 in the similar experiments. The high concentration of KOH led to the destruction of micropore walls instead of forming mesopores.

Characterization of Activated Carbon from Wood Sawdust Prepared via Chemical Activation Using Potassium Hydroxide

2013 ◽  
Vol 832 ◽  
pp. 132-137 ◽  
Author(s):  
Azry Borhan ◽  
Mohd Faisal Taha ◽  
Athirah Amer Hamzah
Keyword(s):  
Activated Carbon ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Total Pore Volume ◽  
Nitrogen Adsorption ◽  
Bet Surface Area ◽  
Wood Sawdust ◽  
Activation Conditions ◽  
Adsorption Desorption

The preparation of activated carbon from wood-based industrys residue is one of the most environmental friendly solutions of transforming negative-valued wastes to valuable materials. Wood sawdust was first chemically activated using potassium hydroxide, KOH and characterized by nitrogen adsorption-desorption isotherms measured in Micrometrices ASAP 2020 and Field Emission Scanning Electron Microscope (FESEM). By manipulating three different parameters, the optimal activation conditions were found at temperature of 500°C, activation time of 60 min and impregnation ratio of 1:3. Results showed that the BET surface area, total pore volume and diameter of activated carbon were 1876.16 m2g-1, 0.88 cm3g-1and 6.93 nm, respectively. Nitrogen adsorption desorption isotherm analysis proved the existence of mesopores in activated carbon produced, suggesting that it can be effectively used as an adsorption material.

Preparation of Activated Carbon from Waste Particle Board by Chemical Activation Using Potassium Hydroxide

2010 ◽  
Vol 129-131 ◽  
pp. 1151-1155 ◽  
Author(s):  
Xiao Juan Jin ◽  
Zhi Ming Yu ◽  
Zhe Ren ◽  
Xin Liu
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Particle Board ◽  
Optimum Conditions ◽  
Activation Time ◽  
Activation Temperature ◽  
Methylene Blue Adsorption ◽  
Positive Effects

Activated carbons were prepared through chemical activation of waste particle board (WPB) precursor using potassium hydroxide as the chemical agent. The effects of different parameters, such as chemical/WPB ratio, activation time and activation temperature on yield and the methylene blue adsorption capacity of activated carbon were investigated. Experimental results indicated that the optimum conditions were as follow: activation temperature 850°C, KOH(50% concentration)/ WPB 4.0, activation time 50 min. Amount of methylene blue adsorption, Iodine number and the yield of activated carbon prepared under optimum conditions were 15.0 mL/0.lg, 1213mg/g and 36.9%, respectively. Therefore, great potential exists for developing activated carbon products from waste wood, which will have the positive effects of reducing our landfill problem and gain attractive products.

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