High surface area mesoporous activated carbon from tomato processing solid waste by zinc chloride activation: process optimization, characterization and dyes adsorption

2016 ◽  
Vol 113 ◽  
pp. 995-1004 ◽  
Author(s):  
Hasan Sayğılı ◽  
Fuat Güzel
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Process Optimization ◽  
Zinc Chloride ◽  
High Surface ◽  
High Surface Area ◽  
Activation Process ◽  
Mesoporous Activated Carbon ◽  
Tomato Processing ◽  
Dyes Adsorption

Supercritical fluid immobilization of horseradish peroxidase on high surface area mesoporous activated carbon

2016 ◽  
Vol 107 ◽  
pp. 513-518 ◽  
Author(s):  
Akshay Jain ◽  
Veronica Ong ◽  
Sundaramurthy Jayaraman ◽  
Rajasekhar Balasubramanian ◽  
M.P. Srinivasan
Keyword(s):  
Activated Carbon ◽  
Horseradish Peroxidase ◽  
Surface Area ◽  
Supercritical Fluid ◽  
High Surface ◽  
High Surface Area ◽  
Mesoporous Activated Carbon

scholarly journals Chestnut-Derived Activated Carbon as a Prospective Material for Energy Storage

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4658 ◽  
Author(s):  
Katarzyna Januszewicz ◽  
Anita Cymann-Sachajdak ◽  
Paweł Kazimierski ◽  
Marek Klein ◽  
Justyna Łuczak ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Activated Carbons ◽  
Chemical Activation ◽  
High Surface ◽  
High Surface Area ◽  
Rate Capability ◽  
Activation Process ◽  
Porous Carbons ◽  
Subsequent Activation

In this work, we present the preparation and characterization of biomass-derived activated carbon (AC) in view of its application as electrode material for electrochemical capacitors. Porous carbons are prepared by pyrolysis of chestnut seeds and subsequent activation of the obtained biochar. We investigate here two activation methods, namely, physical by CO2 and chemical using KOH. Morphology, structure and specific surface area (SSA) of synthesized activated carbons are investigated by Brunauer-Emmett-Teller (BET) technique and scanning electron microscopy (SEM). Electrochemical studies show a clear dependence between the activation method (influencing porosity and SSA of AC) and electric capacitance values as well as rate capability of investigated electrodes. It is shown that well-developed porosity and high surface area, achieved by the chemical activation process, result in outstanding electrochemical performance of the chestnut-derived porous carbons.

Production and Characterization of Activated Carbon from Waste Tire by H3PO4 Treatment for Ethylene Adsorbent Used in Active Packaging

2012 ◽  
Vol 506 ◽  
pp. 214-217 ◽  
Author(s):  
Athiwat Sirimuangjinda ◽  
Khanthima Hemra ◽  
Duangduen Atong ◽  
Chiravoot Pechyen
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Activated Carbons ◽  
Adsorption Property ◽  
High Surface ◽  
High Surface Area ◽  
Fixed Bed ◽  
Activation Process ◽  
Experimental Conditions ◽  
Waste Tire

Pyrolysis is one form of energy recovery process which has the potential to generate oil, gas and char products. The char becomes an attractive by-product, with applications including production of activated carbons, which is useful as a ethylene sorbent for climacteric fruit packaging. In this work, activated carbon prepared from waste tire, produced as a by product of the bio-diesel extraction industry was prepared via chemical treatment with phosphoric acid (H3PO4) at three different char:H3PO4 ratios (1:1, 1:2 and 1:3) under fixed bed pyrolysis at 400, 500 and 600°C for 30 minutes in nitrogen (N2) flow rate of 1000 mL/min and heating rate of 20°C/min. Result shows that char pyrolyzed at 800°C contained high fixed carbon and low volatile content favorable for subsequent activation process compared to other cases.(data not show here) Under the experimental conditions investigated, impregnation ratio of 1:2 were found to be suitable for producing high-surface area activated carbon. It was shown that H3PO4 did work effectively as dehydration reagent at approximately 600°C. The obtained carbons were characterized by nitrogen adsorptiondesorption isotherms at-196 °C. The surface area of activated carbons, which were determined by application of the BrunauerEmmettTeller (BET) and t-plot methods, were achieved as high as 833.50 m2/g. The chemically activated carbons were found to be mainly type II carbons and high adsorption property (Methylene blue adsorption = 622 mg/g and Iodine number = 899 mg/g).

scholarly journals High Surface Area Mesoporous Activated Carbon from Hemp Bast Fibre Using Hydrothermal Processing

2018 ◽  
Author(s):  
Md Zakir Hossain ◽  
Wei Wu ◽  
William Z. Xu ◽  
Muhammad B.I. Chowdhury ◽  
Anil Kumar Jhawar ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Hot Water ◽  
Waste Biomass ◽  
Hydrothermal Processing ◽  
Bast Fibre ◽  
Hemp Fiber ◽  
Mesoporous Activated Carbon

Synthesis of activated carbon from waste biomass is of current interest towards sustainability. The properties of biomass derived activated carbon largely depends on the carbonization process. This study reports preparing extremel high surface area mesoporous activated carbon from hemp bast fibre using hydrothermal processing. Processing in hot water (390-500oC), then activation using KOH and NaOH was investigated at different loading ratios. The described approach was found to enhance the mesoporosity (centered at 3.0 to 4.5 nm) of the hemp derived activated carbon (HAC) from activation (confirmed by BJH pore size distribution and TEM imaging). BET results showed that the product has an extremely high surface area (2425 m2/g) while the surface functional groups (-OH, COOH, C=C/C-C) were confirmed and quantified by XPS and FTIR results. Increasing KOH concentration was found to enhance the surface area with an optimum biochar to KOH ratio of 1:3. The crystallite domain size of HAC was determined using Raman spectroscopy of different wavelengths. The procedure described in this study is an environmentally friendly scalable route for the mass production of activated carbon using hemp fiber.

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