Conversion of powdered active carbon into monoliths without reducing specific surface area using H3PO4-impregnated waste sawdust

2014 ◽  
Vol 125 ◽  
pp. 175-178 ◽  
Author(s):  
Dawei Li ◽  
Yuanyu Tian ◽  
Yingyun Qiao ◽  
Ling Wen
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Active Carbon ◽  
Powdered Active Carbon

scholarly journals Synthesis of Au-decorated three-phase-mixed TiO2/phosphate modified active carbon nanocomposites as easily-recycled efficient photocatalysts for degrading high-concentration 2,4-DCP

RSC Advances ◽  
2019 ◽  
Vol 9 (66) ◽  
pp. 38414-38421 ◽  
Author(s):  
Sharafat Ali ◽  
Zhijun Li ◽  
Wajid Ali ◽  
Ziqing Zhang ◽  
Mingzhuo Wei ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Active Carbon ◽  
Charge Separation ◽  
High Concentration ◽  
Carbon Nanocomposites ◽  
Three Phase

Au decorated three-phase-mixed nanosized TiO2 coupled with phosphate-treated AC as recyclable nanocomposite photocatalysts exhibit excellent photoactivity for degrading high-concentration 2, 4-DCP, mainly due to the improved charge separation and specific surface area.

Co-Producing Active Carbons and Sodium Silicate from Pyrolyzed Rice Husk by CO2 Activation Coupled with NaOH Solution Boiling

2014 ◽  
Vol 595 ◽  
pp. 30-35
Author(s):  
Da Wei Li ◽  
Xi Feng Zhu
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Sodium Silicate ◽  
Specific Surface Area ◽  
Rice Husk ◽  
Active Carbon ◽  
Desirability Function ◽  
Active Carbons ◽  
Solid Ratio ◽  
Naoh Solution

Active carbon and sodium silicate were produced simultaneously from pyrolyzed rice husk (PRH) by CO2 activation coupled with NaOH solution boiling. Doehlert matrix and Derringer's desirability function were applied to optimizing the boiling conditions to achieve a large specific surface area, a high silica extraction and low alkali consumption. In terms of this purpose, the optimum condition was determined as boiling CO2-activated char with 1mol/L NaOH solution at a liquid/solid ratio of 9.7 mL/g. Under this condition, the modulus of the sodium silicate and the specific surface area (SSA) of the active carbon were 2.62 and 897 m2/g, respectively. The values both reached their respective commercial levels. The pretreatment of the PRH with CO2 activation can markedly increase the SSA of active carbons.

scholarly journals Pore Structure Characteristics of Foam Composite with Active Carbon

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4038 ◽  
Author(s):  
Jungsoo Lee ◽  
Young Cheol Choi
Keyword(s):  
Activated Carbon ◽  
Specific Surface ◽  
Pore Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Active Carbon ◽  
Micropore Volume ◽  
High Porosity ◽  
Structure Characteristics ◽  
Foam Composite

Characterization of porous materials is essential for predicting and modeling their adsorption performance, strength, and durability. However, studies on the optimization of the pore structure to efficiently remove pollutants in the atmosphere by physical adsorption of construction materials have been insufficient. This study investigated the pore structure characteristics of foam composites. Porous foam composites were fabricated using foam composite with high porosity, open pores, and palm shell active carbon with micropores. The content was substituted 5%, 10%, 15%, and 20% by volume of cement. From the measured nitrogen adsorption isotherm, the pore structure of the foam composite was analyzed using the Brunauer–Emmett–Teller (BET) theory, Barrett–Joyner–Halenda (BJH) analysis, and Harkins-jura adsorption isotherms. From the analysis results, it was found that activated carbon increases the specific surface area and micropore volume of the foam composite. The specific surface area and micropore volume of the foam composite containing 15% activated carbon were 106.48 m2/g and 29.80 cm3/g, respectively, which were the highest values obtained in this study. A foam composite with a high micropore volume was found to be effective for the adsorption of air pollutants.

An Investigation on the Preparation of Active Carbon-Ceramic Sphere

2011 ◽  
Vol 341-342 ◽  
pp. 98-102
Author(s):  
Wei Min Liu ◽  
Lei Wang ◽  
Shu Zhen Li ◽  
Yu Jing Chen ◽  
Xi Hui Wu
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Active Carbon ◽  
Pore Volume ◽  
Porous Ceramic ◽  
Chemical Activation ◽  
Total Pore Volume ◽  
Resol Resin ◽  
Carbon Ceramic

A procedure for the preparation of active carbon-ceramic sphere was developed. Active carbon-ceramic sphere were prepared by coating a porous ceramic sphere with a phenolic resol resin (carbon precursor). The following procedure was adopted: (a) impregnation of the ceramic substrate with phenolic resol resin; (b) curing; (c) carbonization; (d) activation with KOH etching; (d) washing and drying. Under the optimal impregnation conditions, the material obtained (PRR 70 %) at 30°C, which exhibited a high carbon percentage (~ 5.3 wt.%) with a total pore volume of 0.276 cm3g-1 and a specific surface area of 471 m2g-1 (carbon in the carbon-ceramic sphere) by N2 adsorption, respectively. By means of chemical activation (KC-120), the total pore volume increased to 0.69 cm3g-1 and the specific surface area to 1110 m2g-1 (carbon percentage: 4.73 wt. %), respectively. The activated material shows a uniform carbon distribution, good adsorption properties and a high mechanical strength (24MPa).

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