Modeling of the Adsorptive Desulfurization of Diesel Fuel in a Fixed-Bed Column

2010 ◽  
Vol 33 (7) ◽  
pp. 1137-1145 ◽  
Author(s):  
M. Muzic ◽  
Z. Gomzi ◽  
K. Sertic-Bionda
Keyword(s):  
Diesel Fuel ◽  
Fixed Bed ◽  
Adsorptive Desulfurization ◽  
Fixed Bed Column

A modified homogeneous surface diffusion model for the fixed-bed adsorption of 4,6-DMDBT on Ag–CeOx/TiO2–SiO2

RSC Advances ◽  
2016 ◽  
Vol 6 (114) ◽  
pp. 112899-112907 ◽  
Author(s):  
Meiqin Zheng ◽  
Chengzhi Xu ◽  
Hui Hu ◽  
Zhuoliang Ye ◽  
Xiaohui Chen
Keyword(s):  
Surface Diffusion ◽  
Diffusion Model ◽  
Diesel Fuel ◽  
Fixed Bed ◽  
Fixed Bed Column ◽  
Homogeneous Surface ◽  
Fixed Bed Adsorption

The adsorption of 4,6-dimethyldibenzothiophene (4,6-DMDBT) from diesel fuel using a fixed bed column was investigated.

Breakthrough analysis for hexavalent chromium removal from drinking water in a fixed bed column

2009 ◽  
Vol 9 (6) ◽  
pp. 661-670 ◽  
Author(s):  
S. P. Dubey ◽  
K. Gopal
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Fixed Bed ◽  
Entropy Change ◽  
Spectroscopic Technique ◽  
Fixed Bed Column ◽  
Chromium Vi ◽  
Fixed Bed Adsorption ◽  
Optimal Column ◽  
Eucalyptus Bark

The activated carbon of Eucalyptus globulus was tested for their effectiveness in removing hexavalent chromium from aqueous solution using column experiments. Result revealed that adsorption of chromium(VI) on eucalyptus bark carbon was endothermic in nature. Thermodynamic parameters such as the entropy change, enthalpy change and Gibbs free energy change were found to be 1.39 kJ mol−1 K−1, 1.08 kJ mol−1 and −3.85 kJ mol−1, respectively. Different chromium concentrations were used for the fixed bed adsorption studies. The pre- and post-treated adsorbents were characterized using a FTIR spectroscopic technique. It was concluded that Eucalyptus bark carbon column could be used effectively for removal of hexavalent chromium from aqueous solution at optimal column conditions. This study showed that this biological material is potential adsorbent of Cr(VI) from water.

Biochar caged zirconium ferrite nanocomposites for the adsorptive removal of Reactive Blue 19 dye in a batch and column reactors and conditions optimizaton

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shazia Perveen ◽  
Raziya Nadeem ◽  
Shaukat Ali ◽  
Yasir Jamil
Keyword(s):  
Experimental Data ◽  
Low Dose ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Adsorption Efficiency ◽  
Fixed Bed Column ◽  
Flow Rates ◽  
Adsorptive Removal ◽  
Reactive Blue 19 ◽  
Pseudo Second Order

Abstract Biochar caged zirconium ferrite (BC-ZrFe2O5) nanocomposites were fabricated and their adsorption capacity for Reactive Blue 19 (RB19) dye was evaluated in a fixed-bed column and batch sorption mode. The adsorption of dye onto BC-ZrFe2O5 NCs followed pseudo-second-order kinetics (R 2 = 0.998) and among isotherms, the experimental data was best fitted to Sips model as compared to Freundlich and Langmuir isotherms models. The influence of flow-rate (3–5 mL min−1), inlet RB19 dye concentration (20–100 mg L−1) and quantity of BC-ZrFe2O5 NCs (0.5–1.5 g) on fixed-bed sorption was elucidated by Box-Behnken experimental design. The saturation times (C t /C o  = 0.95) and breakthrough (C t /C o  = 0.05) were higher at lower flow-rates and higher dose of BC-ZrFe2O5 NCs. The saturation times decreased, but breakthrough was increased with the initial RB19 dye concentration. The treated volume was higher at low sorbent dose and influent concentration. Fractional bed utilization (FBU) increased with RB19 dye concentration and flow rates at low dose of BC-ZrFe2O5 NCs. Yan model was fitted best to breakthrough curves data as compared to Bohart-Adams and Thomas models. Results revealed that BC-ZrFe2O5 nanocomposite has promising adsorption efficiency and could be used for the adsorption of dyes from textile effluents.

Continuous fixed-bed column studies of arsenite removal via oxidation and adsorption coprocesses

2021 ◽  
Vol 42 ◽  
pp. 102176
Author(s):  
Pummarin Khamdahsag ◽  
Dickson Y.S. Yan ◽  
Pongnapa Poompang ◽  
Nichapa Supannafai ◽  
Visanu Tanboonchuy
Keyword(s):  
Fixed Bed ◽  
Column Studies ◽  
Fixed Bed Column ◽  
Arsenite Removal
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