Simultaneous desulfuration and denitrogenation of model diesel fuel by Fe-Mn microwave modified activated carbon: Iron crystalline habit influence on adsorption capacity

2019 ◽  
Vol 218 ◽  
pp. 69-82 ◽  
Author(s):  
Javier Antonio Arcibar-Orozco ◽  
Andrea Alejandra Acosta-Herrera ◽  
Jose Rene Rangel-Mendez
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Diesel Fuel ◽  
Modified Activated Carbon ◽  
Carbon Iron ◽  
Model Diesel

Characteristics of Activated Carbon Modified with Nitric Acid and its Performance in Catalytic Ozonation of Acid Red 3R

2013 ◽  
Vol 726-731 ◽  
pp. 1687-1690
Author(s):  
Jing Zhang ◽  
Jian Song Liu ◽  
Chun Liu ◽  
Jing Liang Yang ◽  
Lei Zhang
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Adsorption Capacity ◽  
Functional Groups ◽  
Chemical Properties ◽  
Catalytic Ozonation ◽  
Alkaline Condition ◽  
Ozone Decomposition ◽  
Acid Modification ◽  
Modified Activated Carbon

The structure and surface chemical properties of activated carbon after nitric acid modification and their influences on adsorption and catalytic ozonation of acid red 3R were investigated. The results showed that both specific surface area and micropore volume of activated carbon decreased, but mesopore volume increased after nitric acid modification. The adsorption capacity and catalytic ozonation performance of modified activated carbon were influenced due to the increased surface acidic functional groups. The adsorption capacity of modified activated carbon was enhanced under acidic condition due to dispersion interaction between increased surface acidic functional groups and acid red 3R. The increase in surface acidic functional groups of activated carbon was also considered to be responsible for improvement of the catalytic ozonation of acid red 3R under alkaline condition, because of their participation in the ozone decomposition and OH generation.

Removal of bromate from water using modified activated carbon

2012 ◽  
Vol 12 (3) ◽  
pp. 398-405 ◽  
Author(s):  
Tongmian Liu ◽  
Fuyi Cui ◽  
Dongmei Liu ◽  
Zhiwei Zhao ◽  
Zhiquan Liu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Electrostatic Interactions ◽  
Adsorption Process ◽  
Chemical Properties ◽  
Modified Activated Carbon ◽  
Surface Basicity ◽  
Adsorption Data ◽  
Physical And Chemical ◽  
And Chemical Properties

Coal-based activated carbon (AC) was treated chemically with nitric acid, sodium hydroxide and ammonia, and its ability to adsorb bromate was investigated. Several techniques were used to characterize the physicochemical properties of these materials, including surface area, pHpzc, and Boehm titration. Results indicated that surface physical and chemical properties can influence the adsorption uptake of bromate on ACs simultaneously. Surface basicity and pHpzc were both found to influence the electrostatic interactions between the bromate ions and the surface of the carbon. A correlation was found between basic groups and the adsorption capacity for bromate. The adsorption capacity of the carbon was found to be linearly proportional to the amount of basic groups on the surface. The bromate adsorption data collected from all the samples were found to fit the Toth isotherm model, indicating that the bromate adsorption process could occur on heterogeneous surfaces.

Ultra-deep desulfurization of diesel fuel via selective adsorption over modified activated carbon assisted by pre-oxidation

2017 ◽  
Vol 161 ◽  
pp. 422-430 ◽  
Author(s):  
Yongxing Yang ◽  
Guangqiang Lv ◽  
Liangliang Deng ◽  
Boqiong Lu ◽  
Jinlong Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Diesel Fuel ◽  
Selective Adsorption ◽  
Modified Activated Carbon ◽  
Deep Desulfurization

Removal of 4,6-dimethyldibenzothiophene from model diesel fuel using activated carbon with sulfo group

Carbon ◽  
2012 ◽  
Vol 50 (13) ◽  
pp. 4984 ◽  
Author(s):  
Yuji Ono ◽  
Yoshimasa Amano ◽  
Takako Nakamura ◽  
Motoi Machida
Keyword(s):  
Activated Carbon ◽  
Diesel Fuel ◽  
Sulfo Group ◽  
Model Diesel

Cd(II) removal on surface-modified activated carbon: equilibrium, kinetics and mechanism

2016 ◽  
Vol 74 (8) ◽  
pp. 1800-1808 ◽  
Author(s):  
Jianjun Liang ◽  
Meiling Liu ◽  
Yufei Zhang
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Orthogonal Experiment ◽  
Xrd Analysis ◽  
Bet Surface Area ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Modified Activated Carbon ◽  
Surface Modified

Commercial pulverous activated carbon (AC-0) was modified through two steps: oxidize AC-0 acid firstly, impregnate it with iron using ferric chloride secondly. Orthogonal experiment was conducted then to prepare modified activated carbon with high Cd(II) adsorption capacity (ACNF). Batch adsorption experiments were undertaken to determine the adsorption characteristics of Cd(II) from aqueous solution onto AC-0 and ACNF and the effect of pH, contact time and initial Cd(II) concentration. The results indicate that: the adsorption behavior of Cd(II) on ACNF can be well fitted with Langmuir model, and the maximum adsorption capacity of ACNF was 2.3 times higher than that of AC-0, supporting a monolayer coverage of Cd(II) on the surface. The kinetics of the adsorption process can be described by pseudo-second-order rate equation very well, and the adsorption capacity increased from 0.810 mg/g to 0.960 mg/g after modification. Compared with AC-0, the kinetic parameters of ACNF showed a higher adsorption rate through the aqueous solution to the solid surface and a lower intraparticle diffusion rate. Surface modification resulted in a lower Brunauer–Emmett–Teller (BET) surface area and pore size because of the collapse and blockage of pores, according to the X-ray diffraction (XRD) analysis, while the total number of surface oxygen acid groups increased, and this was supposed to contribute to the enhanced adsorption capacity of modified activated carbon.

Effect of aromatics on the adsorption of thiophenic sulfur compounds from model diesel fuel by activated carbon cloth

2014 ◽  
Vol 119 ◽  
pp. 278-285 ◽  
Author(s):  
Rahimeh Naviri Fallah ◽  
Saeid Azizian ◽  
Guy Reggers ◽  
Robert Carleer ◽  
Sonja Schreurs ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Diesel Fuel ◽  
Sulfur Compounds ◽  
Carbon Cloth ◽  
Activated Carbon Cloth ◽  
Model Diesel
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