Effects of Burn-off and Activation Temperature on Preparation of Activated Carbon from Corn Cob Agrowaste by CO2 and Steam

Chang, Chiung-Fen; Chang, Ching‐Yuan; Tsai, Wen‐Tien

doi:10.1006/jcis.2000.7171

Cited by 184 publications

(106 citation statements)

References 4 publications

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“…Fig. 5 shows that with increasing flame retardant reagent concentration, the ratio of micropore volume to total pore volume (V mic /V t ) or microporosity (%) decreases; this is due to the conversion of micropores into mesopores [19]. From Fig.…”

Section: Effect Of H 3 Po 4 Concentration On Pore Characteristics Of Acfmentioning

confidence: 91%

Study on effect of chemical impregnation on the surface and porous characteristics of activated carbon fabric prepared from viscose rayon

Bhati¹,

J²,

Dixit³

et al. 2014

Carbon letters

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In this study, synthetic viscose rayon fabric has been used for preparing activated carbon fabric (ACF), impregnated with different concentrations of H 3 PO 4 . The effect of H 3 PO 4 impregnation on the weight yield, surface area, pore volume, chemical composition and morphology of ACF were studied. Experimental results revealed that both Brunauer-EmmettTeller surface area and micropore volume increased with increasing H 3 PO 4 concentration; however, the weight yield and microporosity (%) decreased. It was observed that samples impregnated at 70°C (AC-70) give higher yield and higher microporosity as compared to 30°C (AC-30). The average pore size of the ACF also gradually increases from 18.2 to 19 and 16.7 to 20.4 Å for 30°C and 70°C, respectively. The pore size distribution of ACF was also studied. It is also concluded that the final ACF strength is dependent on the concentration of impregnant.

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Section: Effect Of H 3 Po 4 Concentration On Pore Characteristics Of Acfmentioning

confidence: 91%

Study on effect of chemical impregnation on the surface and porous characteristics of activated carbon fabric prepared from viscose rayon

Bhati¹,

J²,

Dixit³

et al. 2014

Carbon letters

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show abstract

“…It can be used as an electrode base material for super capacitors, as a catalyst support for fuel cells because of its porous features and for storage of large quantities of CH 4 and H 2 due to its adsorption capabilities. [1] Of the various porous materials, activated carbon is the most widely used for environmental applications such as gas separation, solvent recovery and water purification because of its high specific surface area and pore volume.…”

Section: Introductionmentioning

confidence: 99%

“…[1] Of the various porous materials, activated carbon is the most widely used for environmental applications such as gas separation, solvent recovery and water purification because of its high specific surface area and pore volume. [2] Many agricultural byproducts and animal wastes have been used as sources for activated carbon, such as date stones, [3] corn cob, [4] pistachio shells, [5] cassava peel, [6] olive cake, [7] broiler manure, [8] cow dung [9] and cattle manure. [10] There are two processes for preparation of activated carbon: physical and chemical activation.…”

Section: Introductionmentioning

confidence: 99%

Surface properties of activated carbon prepared from wastes

Demiral

2008

Surface & Interface Analysis

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“…Although we cannot explain this phenomenon, a study has demonstrated that the pyrolysis of corncobs under an N 2 stream has three distinct stages by carbonization temperature: low (373-523 K), medium (523-673 K), and high (673-1273 K) (Chang et al, 2000). The resulting chars became richer in carbon and had a fundamentally porous structure at carbonization temperatures above 673 K (or 400 C)-conditions that we adopted in this study.…”

Section: Effect Of Carbonization Time and Temperaturementioning

confidence: 88%

Production of granular activated carbon from food-processing wastes (walnut shells and jujube seeds) and its adsorptive properties

Bae

Kim

Chung

2014

Journal of the Air & Waste Management Association

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Commercial activated carbon is a highly effective absorbent that can be used to remove micropollutants from water. As a result, the demand for activated carbon is increasing. In this study, we investigated the optimum manufacturing conditions for producing activated carbon from ligneous wastes generated from food processing. Jujube seeds and walnut shells were selected as raw materials. Carbonization and steam activation were performed in a fixed-bed laboratory electric furnace. To obtain the highest iodine number, the optimum conditions for producing activated carbon from jujube seeds and walnut shells were 2 hr and 1.5 hr (carbonization at 700 C) followed by 1 hr and 0.5 hr (activation at 1000 C), respectively. The surface area and iodine number of activated carbon made from jujube seeds and walnut shells were 1,477 and 1,184 m 2 /g and 1,450 and 1,200 mg/g, respectively. A pore-distribution analysis revealed that most pores had a pore diameter within or around 30-40 Å, and adsorption capacity for surfactants was about 2 times larger than the commercial activated carbon, indicating that waste-based activated carbon can be used as alternative.Implications: Wastes discharged from agricultural and food industries results in a serious environmental problem. A method is proposed to convert food-processing wastes such as jujube seeds and walnut shells into high-grade granular activated carbon. Especially, the performance of jujube seeds as activated carbon is worthy of close attention. There is little research about the application of jujube seeds. Also, when compared to two commercial carbons (Samchully and Calgon samples), the results show that it is possible to produce high-quality carbon, particularly from jujube seed, using a one-stage, 1,000 C, steam pyrolysis. The preparation of activated carbon from food-processing wastes could increase economic return and reduce pollution.

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Effects of Burn-off and Activation Temperature on Preparation of Activated Carbon from Corn Cob Agrowaste by CO2 and Steam

Cited by 184 publications

References 4 publications

Study on effect of chemical impregnation on the surface and porous characteristics of activated carbon fabric prepared from viscose rayon

Study on effect of chemical impregnation on the surface and porous characteristics of activated carbon fabric prepared from viscose rayon

Surface properties of activated carbon prepared from wastes

Production of granular activated carbon from food-processing wastes (walnut shells and jujube seeds) and its adsorptive properties

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