scholarly journals Air Oxidized Activated Carbon Catalyst for Aerobic Oxidative Aromatizations of N-Heterocycles

2021 ◽  
Author(s):  
Lukas Enders ◽  
David Casadio ◽  
Santeri Aikonen ◽  
Anna Lenarda ◽  
Tom Wirtanen ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Active Carbon ◽  
Aromatic Compounds ◽  
Carbon Catalyst ◽  
Air Treatment ◽  
Oxidized Activated Carbon

A simple “reagent-free” thermal air treatment turns active carbon into a mildly oxidized material with an increased quinoidic content that catalytically dehydrogenates saturated N-heterocycles to the corresponding aromatic compounds. Additional...

scholarly journals THE EFFECT OF TEMPERATURE ON THE PERFORMANCE OF ACTIVATED CARBON OVER CATALYTIC CRACKING OF CRUDE PALM OIL

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Nazarudin Nazarudin ◽  
Ulyarti Ulyarti ◽  
Oky Alfernando ◽  
Ira Galih ◽  
Susilawati Susilawati ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Palm Oil ◽  
Active Carbon ◽  
Catalytic Cracking ◽  
Effect Of Temperature ◽  
Crude Palm Oil ◽  
Carbon Catalyst ◽  
Different Temperatures ◽  
Higher Temperature ◽  
Catalyst Increase

This research was carried out to investigate the effect of temperature in carbon production on its performance in the catalystic cracking of CPO to fuel.  The carbon was produced using palm shell at 2 different temperatures (450 and 550oC).  The cracking of CPO was carried out with and without the active carbon catalyst.  The result showed that the use of catalyst increase the conversion of both gas and liquid conversion.  The use of higher temperature in the production of active carbon catalyst increased the performance of the catalyst, in particular, for the liquid conversion. Keywords :Activated carbon, catalyst, catalytic cracking, crude palm oil

scholarly journals The influence of active carbon contaminants on the ozonation mechanism interpretation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lilla Fijołek ◽  
Joanna Świetlik ◽  
Marcin Frankowski
Keyword(s):  
Activated Carbon ◽  
Active Carbon ◽  
Alkali Metals ◽  
Activated Carbons ◽  
Carbon Surface ◽  
Bulk Solution ◽  
Ozone Decomposition ◽  
Reaction Products ◽  
Treatment Technology ◽  
Carbon Impurities

AbstractIn water treatment technology, activated carbons are used primarily as sorbents to remove organic impurities, mainly natural organic matter, but also as catalysts in the ozonation process. Commercially available activated carbons are usually contaminated with mineral substances, classified into two main groups: alkali metals (Ca, Na, K, Li, Mg) and multivalent metals (Al, Fe, Ti, Si). The presence of impurities on the carbon surface significantly affects the pHpzc values determined for raw and ozonated carbon as well as their acidity and alkalinity. The scale of the observed changes strongly depends on the pH of the ozonated system, which is related to the diffusion of impurities from the carbon to the solution. In an acidic environment (pH 2.5 in this work), the ozone molecule is relatively stable, yet active carbon causes its decomposition. This is the first report that indirectly indicates that contaminants on the surface of activated carbon (multivalent elements) contribute to the breakdown of ozone towards radicals, while the process of ozone decomposition by purified carbons does not follow the radical path in bulk solution. Carbon impurities also change the distribution of the reaction products formed by organic pollutants ozonation, which additionally confirms the radical process. The study showed that the use of unpurified activated carbon in the ozonation of succinic acid (SA) leads to the formation of a relatively large amount of oxalic acid (OA), which is a product of radical SA degradation. On the other hand, in solutions with purified carbon, the amount of OA generated is negligible.

scholarly journals Optimization on The Hydrolysis Process of Cellulose from Corn Husk to Glucose with Activated Carbon Catalyst Sulfonated

2021 ◽  
Vol 1858 (1) ◽  
pp. 012088
Author(s):  
Didi Dwi Anggoro ◽  
Luqman Buchori ◽  
Mohamad Djaeni ◽  
Ratnawati ◽  
Diah Susetyo Retnowati ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Catalyst ◽  
Corn Husk ◽  
Hydrolysis Process

scholarly journals Phosphorus-doped activated carbon catalyst for n-hexane dehydroaromatization reaction

2021 ◽  
pp. 106318
Author(s):  
Yong Li ◽  
Hong Zhao ◽  
Siyuan Chen ◽  
Shuhao Bao ◽  
Feifei Xing ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Catalyst ◽  
Phosphorus Doped

Retracted Article: Enhanced adsorption of ionizable aromatic compounds on humic acid-coated carbonaceous adsorbents

RSC Advances ◽  
2012 ◽  
Vol 2 (27) ◽  
pp. 10359-10364 ◽  
Author(s):  
Yubing Sun ◽  
Changlun Chen ◽  
Dadong Shao ◽  
Jiaxing Li ◽  
Xiaoli Tan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Activated Carbon ◽  
Humic Acid ◽  
Aromatic Compounds ◽  
Flake Graphite ◽  
Graphene Oxide Nanosheets ◽  
Multiwalled Carbon ◽  
Retracted Article ◽  
Enhanced Adsorption

Adsorption of ionizable aromatic compounds (IACs) such as 1-naphthylamine and 1-naphthol on Humic acid (HA)-coated graphene oxide nanosheets (GONs), multiwalled carbon nanotubes (MWCNTs), activated carbon (AC), and flake graphite (FG) were investigated by the batch techniques.

Side-chain alkylation of toluene with methanol over Cs2O-activated carbon catalyst

1984 ◽  
Vol 25 (1-2) ◽  
pp. 11-15 ◽  
Author(s):  
N. Yamaguchi ◽  
A. Kobayashi ◽  
T. Sodesawa ◽  
F. Nozaki
Keyword(s):  
Activated Carbon ◽  
Side Chain ◽  
Carbon Catalyst

Comparison of chemical and thermal regeneration of aromatic compounds on exhausted activated carbon

1997 ◽  
Vol 35 (7) ◽  
pp. 279-285 ◽  
Author(s):  
P. C. Chiang ◽  
E. E. Chang ◽  
J. S. Wu
Keyword(s):  
Molecular Structure ◽  
Activated Carbon ◽  
Physicochemical Properties ◽  
Adsorption Capacity ◽  
Aromatic Compounds ◽  
Thermal Regeneration ◽  
Desorption Efficiency ◽  
Chemical Regeneration

In this investigation, nine typical compounds, i.e., phenol, 2-aminophenol, aniline, 2-chlorophenol, chlorobenzene, β-naphthol, naphthalene, α-naphthylamine and α-chloronaphthalene were introduced to evaluate the effects of the molecular structure and physicochemical properties of these selected adsorbates on the adsorption capacity and desorption efficiency of the activated carbon. Both the thermal and chemical regeneration methods were employed to compare the regeneration efficiencies among these adsorbates and adsorbent.

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