Evaluation of the Wheeler-Jonas parameters for biogas trace compounds removal with activated carbons

2016 ◽  
Vol 152 ◽  
pp. 93-101 ◽  
Author(s):  
Davide Papurello ◽  
Luca Tomasi ◽  
Silvia Silvestri ◽  
Massimo Santarelli
Keyword(s):  
Activated Carbons ◽  
Trace Compounds

scholarly journals Biogas Purification: A Comparison of Adsorption Performance in D4 Siloxane Removal Between Commercial Activated Carbons and Waste Wood-Derived Char Using Isotherm Equations

Processes ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 774 ◽  
Author(s):  
Papurello ◽  
Gandiglio ◽  
Kafashan ◽  
Lanzini
Keyword(s):  
Adsorption Capacity ◽  
Adsorption Isotherms ◽  
Activated Carbons ◽  
Biogas Production ◽  
Pollutant Emissions ◽  
Low Concentrations ◽  
Biogas Purification ◽  
Porous Volume ◽  
Trace Compounds ◽  
Isotherm Equations

Biogas production from organic waste could be an option to reduce landfill and pollutant emissions into air, water, and soil. These fuels contain several trace compounds that are crucial for highly efficient energy generators or gas injection into the grid. The ability of adsorbents to physically remove such adsorbates was investigated using adsorption isotherms at a constant temperature. We experimentally modelled isotherms for siloxane removal. Siloxanes were considered due to their high impact on energy generators performance even at low concentrations. Octamethylcyclotetrasiloxane was selected as a model compound and was tested using commercially available carbon and char derived from waste materials. The results show that recyclable material can be used in an energy production site and that char must be activated to improve its removal performance. The adsorption capacity is a function of specific surface area and porous volume rather than the elemental composition. The most common adsorption isotherms were employed to find the most appropriate isotherm to estimate the adsorption capacity and to compare the sorbents. The Dubinin-Radushkevich isotherm coupled with the Langmuir isotherm was found to be the best for estimating the adsorption capacity.

Desorption and Reutilization Studies of Copper and Lead Lons by Activated Carbons Prepared from Ulva Fasciata sp

2012 ◽  
Vol 2 (6) ◽  
pp. 60-63
Author(s):  
R. P. Suresh Jeyakumar ◽  
◽  
Dr. V. Chandrasekaran Dr. V. Chandrasekaran
Keyword(s):  
Activated Carbons ◽  
Ulva Fasciata

Confining H2 and D2 by adsorption in microporous carbons (single-wall carbon nanotubes and activated carbons) doped by K or Li

2005 ◽  
Vol 30 (4) ◽  
pp. 393-400 ◽  
Author(s):  
Szymon Los ◽  
Philippe Azais ◽  
Roland JM Pellenq ◽  
Yannick Breton ◽  
Olivier Isnard ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbons ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Microporous Carbons

Use of activated carbon to remove undesirable residual amylase from refinery streams

2017 ◽  
pp. 96-103 ◽  
Author(s):  
Gillian Eggleston ◽  
Isabel Lima ◽  
Emmanuel Sarir ◽  
Jack Thompson ◽  
John Zatlokovicz ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Temperature ◽  
High Performance ◽  
Activated Carbons ◽  
Amylase Activity ◽  
Sugar Industry ◽  
End User ◽  
Customer Complaints ◽  
Carry Over ◽  
Very High

In recent years, there has been increased world-wide concern over residual (carry-over) activity of mostly high temperature (HT) and very high temperature (VHT) stable amylases in white, refined sugars from refineries to various food and end-user industries. HT and VHT stable amylases were developed for much larger markets than the sugar industry with harsher processing conditions. There is an urgent need in the sugar industry to be able to remove or inactivate residual, active amylases either in factory or refinery streams or both. A survey of refineries that used amylase and had activated carbon systems for decolorizing, revealed they did not have any customer complaints for residual amylase. The use of high performance activated carbons to remove residual amylase activity was investigated using a Phadebas® method created for the sugar industry to measure residual amylase in syrups. Ability to remove residual amylase protein was dependent on the surface area of the powdered activated carbons as well as mixing (retention) time. The activated carbon also had the additional benefit of removing color and insoluble starch.

Adsorption/Desorption Performance of CO2 on Pitch-based Spherical Activated Carbons

2011 ◽  
Vol 26 (2) ◽  
pp. 149-154 ◽  
Author(s):  
Fei XIE ◽  
Yan Li WANG ◽  
Liang ZHAN ◽  
Ming GE ◽  
Xiao-Yi LIANG ◽  
...  
Keyword(s):  
Activated Carbons ◽  
Adsorption Desorption

Effect of Polyphosphate on Removal of Endocrine-Disrupting Chemicals of Nonylphenol and Bisphenol-A by Activated Carbons

2005 ◽  
Vol 40 (4) ◽  
pp. 484-490 ◽  
Author(s):  
Keun J. Choi ◽  
Sang G. Kim ◽  
Chang W. Kim ◽  
Seung H. Kim
Keyword(s):  
Activated Carbon ◽  
Bisphenol A ◽  
Surface Charge ◽  
Activated Carbons ◽  
Endocrine Disrupting Chemicals ◽  
Dipole Interaction ◽  
High Affinity ◽  
Calcium Polyphosphate ◽  
Endocrine Disrupting ◽  
Positively Charged

Abstract This study examined the effect of polyphosphate on removal of endocrine-disrupting chemicals (EDCs) such as nonylphenol and bisphenol-A by activated carbons. It was found that polyphosphate aided in the removal of nonylphenol and bisphenol- A. Polyphosphate reacted with nonylphenol, likely through dipole-dipole interaction, which then improved the nonylphenol removal. Calcium interfered with this reaction by causing competition. It was found that polyphosphate could accumulate on carbon while treating a river. The accumulated polyphosphate then aided nonylphenol removal. The extent of accumulation was dependent on the type of carbon. The accumulation occurred more extensively with the wood-based used carbon than with the coal-based used carbon due to the surface charge of the carbon. The negatively charged wood-based carbon attracted the positively charged calcium-polyphosphate complex more strongly than the uncharged coal-based carbon. The polyphosphate-coated activated carbon was also effective in nonylphenol removal. The effect was different depending on the type of carbon. Polyphosphate readily attached onto the wood-based carbon due to its high affinity for polyphosphate. The attached polyphosphate then improved the nonylphenol removal. However, the coating failed to attach polyphosphate onto the coal-based carbon. The nonylphenol removal performance of the coal-based carbon remained unchanged after the polyphosphate coating.

scholarly journals Adsorption of CCl4 from Aqueous Solution on Activated Carbons

2000 ◽  
Vol 18 (9) ◽  
pp. 823-837 ◽  
Author(s):  
Eugeniusz Milchert ◽  
Waldemar Goc ◽  
Robert Pelech
Keyword(s):  
Aqueous Solution ◽  
Activated Carbons

Surface functionality and porosity of activated carbons obtained from chemical activation of wood

Carbon ◽  
2000 ◽  
Vol 38 (5) ◽  
pp. 669-674 ◽  
Author(s):  
H Benaddi ◽  
T.J Bandosz ◽  
J Jagiello ◽  
J.A Schwarz ◽  
J.N Rouzaud ◽  
...  
Keyword(s):  
Activated Carbons ◽  
Chemical Activation ◽  
Surface Functionality
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