Hydrothermal Carbonisation: An Eco-Friendly Method for the Production of Carbon Adsorbents

2017 ◽  
pp. 77-108
Author(s):  
Carlos Javier Durán-Valle ◽  
Almudena B. Botet-Jiménez ◽  
Delia Omenat-Morán
Keyword(s):  
Carbon Adsorbents ◽  
Hydrothermal Carbonisation

scholarly journals Development and Characterization of Composite Carbon Adsorbents with Photocatalytic Regeneration Ability: Application to Diclofenac Removal from Water

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 173
Author(s):  
Velma Beri Kimbi Yaah ◽  
Satu Ojala ◽  
Hamza Khallok ◽  
Tiina Laitinen ◽  
Marcin Selent ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Functional Groups ◽  
Specific Surface Area ◽  
Palm Kernel ◽  
Hydrothermal Carbonization ◽  
Carbon Composite ◽  
Carbon Adsorbents ◽  
Regeneration Ability ◽  
Activation Temperature

This paper presents results related to the development of a carbon composite intended for water purification. The aim was to develop an adsorbent that could be regenerated using light leading to complete degradation of pollutants and avoiding the secondary pollution caused by regeneration. The composites were prepared by hydrothermal carbonization of palm kernel shells, TiO2, and W followed by activation at 400 °C under N2 flow. To evaluate the regeneration using light, photocatalytic experiments were carried out under UV-A, UV-B, and visible lights. The materials were thoroughly characterized, and their performance was evaluated for diclofenac removal. A maximum of 74% removal was observed with the composite containing TiO2, carbon, and W (HCP25W) under UV-B irradiation and non-adjusted pH (~5). Almost similar results were observed for the material that did not contain tungsten. The best results using visible light were achieved with HCP25W providing 24% removal of diclofenac, demonstrating the effect of W in the composite. Both the composites had significant amounts of oxygen-containing functional groups. The specific surface area of HCP25W was about 3 m2g−1, while for HCP25, it was 160 m2g−1. Increasing the specific surface area using a higher activation temperature (600 °C) adversely affected diclofenac removal due to the loss of the surface functional groups. Regeneration of the composite under UV-B light led to a complete recovery of the adsorption capacity. These results show that TiO2- and W-containing carbon composites are interesting materials for water treatment and they could be regenerated using photocatalysis.

Propane selective carbon adsorbents from phenolic resin precursor

2021 ◽  
pp. 111071
Author(s):  
Márcia Andrade ◽  
Andrew J. Parnell ◽  
Gabriel Bernardo ◽  
Adélio Mendes
Keyword(s):  
Phenolic Resin ◽  
Carbon Adsorbents

The mechanism of the adsorption of water molecules on carbon adsorbents

1995 ◽  
Vol 64 (11) ◽  
pp. 985-1001 ◽  
Author(s):  
R Sh Vartapetyan ◽  
A M Voloshchuk
Keyword(s):  
Carbon Adsorbents ◽  
Water Molecules ◽  
Adsorption Of Water

scholarly journals Evaluation of Porous Carbon Adsorbents Made from Rice Husks for Virus Removal in Water

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1280
Author(s):  
Vu Duc Canh ◽  
Seiichiro Tabata ◽  
Shun Yamanoi ◽  
Yoichi Onaka ◽  
Toshiyuki Yokoi ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Activated Carbons ◽  
Carbon Adsorbents ◽  
Rice Husks ◽  
Porous Carbons ◽  
Inorganic Pollutants ◽  
Steam Activation ◽  
Virus Removal ◽  
Silica Removal ◽  
Effective Removal

Porous carbons are well-known efficient adsorbents for a variety of organic and inorganic pollutants; however, they have difficulty in virus removal. In this study, novel porous carbons (NPCs) (NPC-A, NPC-B, and NPC-C) derived from rice husks were compared with commercially available activated carbons (ACs) for their ability to remove MS2 bacteriophages (MS2) in a batch experiment. NPC-A was produced by the silica removal process. NPC-B was prepared with an additional steam activation applied to NPC-A. NPC-C was obtained with an additional acid rinse applied to NPC-B. The NPCs (particularly NPC-C) exhibited effective removal of up to 5.3 log10 of MS2, which was greater than that of less than 2.7 log10 obtained by other ACs under 10 g/L during the same contact time (60 min). The pore size distribution of the porous carbon adsorbents was found to influence their virus removal performance. The adsorbents with a larger proportion of pores ranging from 200–4500 nm in diameter were able to achieve higher virus removal rates. Thus, NPCs (particularly NPC-C), which had a larger volume of pores ranging from 200–4500 nm in size, demonstrated the potential for use as efficient adsorbents for removing viruses during water purification.

Comparative Characterization of Carbon Adsorbents and Polymer Precursors by Small-Angle X-ray Scattering and Nitrogen Adsorption Methods

2011 ◽  
Vol 115 (21) ◽  
pp. 10727-10735 ◽  
Author(s):  
V. M. Gun’ko ◽  
S. T. Meikle ◽  
O. P. Kozynchenko ◽  
S. R. Tennison ◽  
F. Ehrburger-Dolle ◽  
...  
Keyword(s):  
Small Angle ◽  
Nitrogen Adsorption ◽  
Carbon Adsorbents ◽  
X Ray ◽  
Comparative Characterization ◽  
Polymer Precursors ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Determination of the adsorption volume and surface of carbon adsorbents with developed mesoporosity

2000 ◽  
Vol 49 (4) ◽  
pp. 692-700
Author(s):  
A. A. Pribylov ◽  
I. A. Kalinnikova ◽  
S. M. Kalashnikov ◽  
G. F. Stoeckli
Keyword(s):  
Carbon Adsorbents ◽  
Adsorption Volume

Study of sorption and bactericidal properties of carbon adsorbents and fullerenes

2014 ◽  
Vol 87 (7) ◽  
pp. 990-993 ◽  
Author(s):  
V. V. Samonin ◽  
E. A. Spiridonova ◽  
M. L. Podvyaznikov ◽  
A. D. Tikhomirova
Keyword(s):  
Carbon Adsorbents ◽  
Bactericidal Properties
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