scholarly journals Nature and evolution of Pd catalysts supported on activated carbon fibers during the catalytic reduction of bromate in water

2020 ◽  
Vol 10 (11) ◽  
pp. 3646-3653
Author(s):  
Jose L. Cerrillo ◽  
Christian W. Lopes ◽  
Fernando Rey ◽  
Giovanni Agostini ◽  
Lioubov Kiwi-Minsker ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Fibers ◽  
Crystal Size ◽  
Catalytic Reduction ◽  
Order Kinetic ◽  
Activated Carbon Fibers ◽  
Pd Catalysts ◽  
First Order ◽  
Pseudo First Order ◽  
Bromate Reduction

Pd/ACF are active catalysts for the bromate reduction and their activity depends on the Pd crystal size with a pseudo-first order kinetic respect to BrO3− and H2 partial pressure.

Preparation and Characterization of Nano-Scaled Ag Plated Activated Carbon Fibers for NO Removal

2005 ◽  
Vol 23 ◽  
pp. 215-218
Author(s):  
Soo Jin Park ◽  
Byung Joo Kim
Keyword(s):  
Activated Carbon ◽  
Carbon Fibers ◽  
Catalytic Reduction ◽  
Silver Content ◽  
Adsorption Properties ◽  
Activated Carbon Fibers ◽  
No Removal ◽  
Surface Areas ◽  
Silver Metal

In this work, the catalytic reduction of NO over activated carbon fibers (ACFs)/Ag prepared by nanoscaled Ag electroplating has been studied. It is observed that silver content on ACF surfaces increases with increasing the plating time. However, a decrease of adsorption properties, including BET’s specific surface areas and total pore volumes, in increasing the plating time is observed within the range of well-developed micropore structures. As the experimental results, the net heat of adsorption of the ACFs/Ag samples is largely influenced on the amount of silver metal, and the catalytic ability for NO removal over ACFs/Ag samples is improved in the presence of silver on the ACFs. However, the adsorption properties of the excessively silver loaded samples are significantly reduced, resulting in the decrease of the removal efficiency. Therefore, the NO removal is largely depended on silver content on ACFs, together with the results of adsorption properties of the ACFs.

The Catalytic Reduction of Nitrogen Oxide Over the Catalysts Supported on Activated Carbon Fibers

1994 ◽  
Vol 344 ◽  
Author(s):  
Yun Lu ◽  
Ruowen Fu ◽  
Yishan Chen ◽  
Hanmin Zeng
Keyword(s):  
Nitric Oxide ◽  
Activated Carbon ◽  
Carbon Fiber ◽  
Nitrogen Oxide ◽  
Carbon Fibers ◽  
Catalytic Reduction ◽  
Activated Carbon Fiber ◽  
Activated Carbon Fibers ◽  
Catalytic Activities ◽  
Composite Series

AbstractCopper-series, nickel-series, and copper-cobalt composite-series catalysts supported on activated carbon fiber were prepared in this paper. Their structures and catalytic activities for the reduction of nitric oxide with ammonia were investigated simultaneously.

scholarly journals Adsorption of Acid Red 18 (AR18) by Activated Carbon from Poplar Wood- A Kinetic and Equilibrium Study

2010 ◽  
Vol 7 (1) ◽  
pp. 65-72 ◽  
Author(s):  
Reza Shokoohi ◽  
Vahid Vatanpoor ◽  
Mansuor Zarrabi ◽  
Akram Vatani
Keyword(s):  
Activated Carbon ◽  
Removal Efficiency ◽  
Kinetic Models ◽  
Contact Time ◽  
Isotherm Models ◽  
Order Kinetic ◽  
Poplar Wood ◽  
Adsorbent Dosage ◽  
First Order ◽  
Pseudo First Order

Adsorption process by activated carbon is widely used for removal of dyes. Because of economical limits, activated carbon derived from low cost materials seem to be economical. The aim of this work is preparation of activated carbon from poplar wood and investigation of its ability to removal of (AR18) dye. In this work, we prepared the activated carbon by chemical activation method in electric furnace. In addition we have investigated effect of various parameters such as pH, contact time, dye concentration and adsorbent dosage on dye removal. Langmuir and Freundlich isotherm models have been investigated. Pseudo-first order, pseudo-second order and modified pseudo-first order kinetic models have been used for experimental data. The results showed that removal efficiency was increased with increasing of adsorbent dosage, contact time and decreasing of pH, but with increasing of dye concentration, the removal efficiency was decreased. Adsorption isotherm models showed that Langmuir isotherm model was best fitted onto collected data (r2>0.978). In addition, kinetic models showed that sorption of AR18 onto activated carbon prepared from poplar wood follows the pseudo-first order model (r2>0.9758).

scholarly journals Mercury adsorption in the gas phase by regenerable Au-loaded activated carbon foams: a kinetic and reaction mechanism study

2020 ◽  
Vol 44 (28) ◽  
pp. 12009-12018 ◽  
Author(s):  
Cristina Antuña-Nieto ◽  
Elena Rodríguez ◽  
M. Antonia López-Antón ◽  
Roberto García ◽  
M. Rosa Martínez-Tarazona
Keyword(s):  
Activated Carbon ◽  
Gas Phase ◽  
Order Kinetic ◽  
Mechanism Study ◽  
Mercury Adsorption ◽  
First Order ◽  
Carbon Foams ◽  
Order Kinetic Model ◽  
Pseudo First Order ◽  
Rate Controlling Step

External diffusion is the rate-controlling step in the adsorption of gas phase Hg0 with Au-loaded activated carbon foams (pseudo-first order kinetic model).

Oxidation of Activated Carbon Fibers:  Effect on Pore Size, Surface Chemistry, and Adsorption Properties

1999 ◽  
Vol 11 (12) ◽  
pp. 3476-3483 ◽  
Author(s):  
Christian L. Mangun ◽  
Kelly R. Benak ◽  
Michael A. Daley ◽  
James Economy
Keyword(s):  
Activated Carbon ◽  
Surface Chemistry ◽  
Pore Size ◽  
Carbon Fibers ◽  
Adsorption Properties ◽  
Activated Carbon Fibers

scholarly journals Comparative studies on the removal of copper (II) by Ulva fasciata activated carbon and commercially activated carbon

2012 ◽  
Vol 14 (4) ◽  
pp. 88-94 ◽  
Author(s):  
R.P. Suresh Jeyakumar ◽  
V. Chandrasekaran
Keyword(s):  
Activated Carbon ◽  
Activated Carbons ◽  
Synthetic Wastewater ◽  
Batch Adsorption ◽  
First Order ◽  
Ulva Fasciata ◽  
Adsorption Data ◽  
Pseudo Second Order ◽  
Pseudo First Order ◽  
Adsorbent Dose

Abstract In this work, the efficiency of Ulva fasciata sp. activated carbons (CCUC, SCUC and SSUC) and commercially activated carbon (CAC) were studied for the removal of Cu (II) ions from synthetic wastewater. Batch adsorption experiments were carried out as a function of pH, contact time, initial copper concentration and adsorbent dose. The percentage adsorption of copper by CCUC, SSUC, SCUC and CAC are 88.47%, 97.53%, 95.78% and 77.42% respectively. Adsorption data were fitted with the Langmuir, Freundlich and Temkin models. Two kinetic models pseudo first order and the pseudo second order were selected to interpret the adsorption data.

Visualized observation of pores in activated carbon fibers by HRTEM and combined image processor

1998 ◽  
Vol 5 (3-4) ◽  
pp. 261-266 ◽  
Author(s):  
M. Endo ◽  
T. Furuta ◽  
F. Minoura ◽  
C. Kim ◽  
K. Oshida ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Fibers ◽  
Activated Carbon Fibers ◽  
Image Processor

Preparation and Characterization of Activated Carbon Fibers from Jute Fibers by Phosphoric Acid Activation

2012 ◽  
Vol 184-185 ◽  
pp. 1110-1113 ◽  
Author(s):  
Li Fen He ◽  
Qi Xia Liu ◽  
Tao Ji ◽  
Qiang Gao
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Phosphoric Acid ◽  
Carbon Fibers ◽  
Activated Carbon Fibers ◽  
Optimum Conditions ◽  
Activation Time ◽  
Activation Temperature ◽  
Jute Fibers ◽  
Activating Agent

Various jute-based activated carbon fibers were prepared by using jute fibers as raw materials and phosphoric acid as activating agent. The effects of three main factors such as concentration of activating agent, activation temperature and activation time on the yield and adsorptive properties of active carbon fibers were investigated via orthogonal experiments. The surface physical morphology of jute-based activated carbon fiber was also observed by using Scanning Electron Microscope. Results showed that the optimum conditions were phosphoric acid concentration of 4 mol/L, activation temperature of 600 °C and activation time of 1h. The yield, iodine number and amount of methylene blue adsorption of the active carbon fiber prepared under optimum conditions were 37.99 %, 1208.87 mg/g and 374.65 mg/g, respectively.

HCl removal using activated carbon fibers electroplated with silver

Carbon ◽  
2004 ◽  
Vol 42 (10) ◽  
pp. 2113-2115 ◽  
Author(s):  
Soo-Jin Park ◽  
Sung-Yeol Jin
Keyword(s):  
Activated Carbon ◽  
Carbon Fibers ◽  
Activated Carbon Fibers ◽  
Hcl Removal
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