Direct hydroxylation of 1,4‐Dichlorobenzene to 2,5‐Dichlorophenol over Activated Carbon Catalysts

2021 ◽  
Vol 6 (2) ◽  
pp. 239-248
Author(s):  
Lixian Guo ◽  
Li Liu ◽  
Conglin Pang ◽  
Guiying Li ◽  
Changwei Hu
Keyword(s):  
Activated Carbon ◽  
Carbon Catalysts ◽  
Direct Hydroxylation

scholarly journals Pretreatment of Switchgrass for Production of Glucose via Sulfonic Acid-Impregnated Activated Carbon

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 504
Author(s):  
Yane Ansanay ◽  
Praveen Kolar ◽  
Ratna Sharma-Shivappa ◽  
Jay Cheng ◽  
Consuelo Arellano
Keyword(s):  
Activated Carbon ◽  
Sulfonic Acid ◽  
Solid Acid ◽  
Methanesulfonic Acid ◽  
Biofuel Production ◽  
Acid Catalysts ◽  
Effects Of Temperature ◽  
Carbon Catalysts ◽  
Hydrolysis Of

In the present research, activated carbon-supported sulfonic acid catalysts were synthesized and tested as pretreatment agents for the conversion of switchgrass into glucose. The catalysts were synthesized by reacting sulfuric acid, methanesulfonic acid, and p-toluenesulfonic acid with activated carbon. The characterization of catalysts suggested an increase in surface acidities, while surface area and pore volumes decreased because of sulfonation. Batch experiments were performed in 125 mL serum bottles to investigate the effects of temperature (30, 60, and 90 °C), reaction time (90 and 120 min) on the yields of glucose. Enzymatic hydrolysis of pretreated switchgrass using Ctec2 yielded up to 57.13% glucose. Durability tests indicated that sulfonic solid-impregnated carbon catalysts were able to maintain activity even after three cycles. From the results obtained, the solid acid catalysts appear to serve as effective pretreatment agents and can potentially reduce the use of conventional liquid acids and bases in biomass-into-biofuel production.

scholarly journals High-Active Metallic-Activated Carbon Catalysts for Selective Hydrogenation

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Nicolás Carrara ◽  
Carolina Betti ◽  
Fernando Coloma-Pascual ◽  
María Cristina Almansa ◽  
Laura Gutierrez ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Selective Hydrogenation ◽  
Nickel Catalysts ◽  
Metallic Phase ◽  
Hydrogen Chemisorption ◽  
Electronic Effects ◽  
X Ray ◽  
Mild Conditions ◽  
Temperature Programmed ◽  
Carbon Catalysts

A series of low-loaded metallic-activated carbon catalysts were evaluated during the selective hydrogenation of a medium-chain alkyne under mild conditions. The catalysts and support were characterized by ICP, hydrogen chemisorption, Raman spectroscopy, temperature-programmed desorption (TPD), temperature-programmed reduction (TPR), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR micro-ATR), transmission electronic microscopy (TEM), and X-ray photoelectronic spectroscopy (XPS). When studying the effect of the metallic phase, the catalysts were active and selective to the alkene synthesis. NiCl/C was the most active and selective catalytic system. Besides, when the precursor salt was evaluated, PdN/C was more active and selective than PdCl/C. Meanwhile, alkyne is present in the reaction media, and geometrical and electronic effects favor alkene desorption and so avoid their overhydrogenation to the alkane. Under mild conditions, nickel catalysts are considerably more active and selective than the Lindlar catalyst.

Direct synthesis of phenol from benzene on iron-impregnated activated carbon catalysts

2005 ◽  
Vol 290 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
J CHOI ◽  
T KIM ◽  
K CHOO ◽  
J SUNG ◽  
M SAIDUTTA ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Direct Synthesis ◽  
Carbon Catalysts

Hydrogenolysis of alginic acid over mono and bimetallic ruthenium/nickel supported on activated carbon catalysts with basic promoters

2020 ◽  
Vol 5 (9) ◽  
pp. 1783-1790
Author(s):  
Seungdo Yang ◽  
Hyungjoo Kim ◽  
Do Heui Kim
Keyword(s):  
Activated Carbon ◽  
Alginic Acid ◽  
Carbon Catalyst ◽  
Carbon Catalysts

Hydrogenolysis of alginic acid, derived from macroalgae, was performed over Ru–Ni supported on activated carbon catalyst using NaOH as basic promoter to produce glycols.

Gas phase hydrogenation of crotonaldehyde over Pt/Activated carbon catalysts. Influence of the oxygen surface groups on the support

1997 ◽  
Vol 150 (1) ◽  
pp. 165-183 ◽  
Author(s):  
F. Coloma ◽  
A. Sepúlveda-Escribano ◽  
J.L.G. Fierro ◽  
F. Rodríguez-Reinoso
Keyword(s):  
Activated Carbon ◽  
Gas Phase ◽  
Surface Groups ◽  
Carbon Catalysts ◽  
Oxygen Surface

scholarly journals Low-temperature complete oxidation of BTX on Pt/activated carbon catalysts

2000 ◽  
Vol 63 (2-4) ◽  
pp. 419-426 ◽  
Author(s):  
Jeffrey Chi-Sheng Wu ◽  
Zhi-An Lin ◽  
Feng-Ming Tsai ◽  
Jen-Wei Pan
Keyword(s):  
Activated Carbon ◽  
Low Temperature ◽  
Complete Oxidation ◽  
Carbon Catalysts
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