An Efficient Catalyst of CuPt/TiO2 for Photocatalytic Direct Dehydrogenation of Methanol to Methyl Formate at Ambient Temperature

2022 ◽  
Author(s):  
Haifeng Zhang ◽  
Xuzhuang Yang ◽  
Guanjun Gao ◽  
Jingkai Yan ◽  
Min Zhao ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Methyl Formate ◽  
Methanol Conversion ◽  
Thermal Reaction ◽  
Efficient Catalyst ◽  
Thermodynamic Restriction ◽  
Challenging Issue

To obtain high methanol conversion at high methyl formate (MF) selectivity by the thermal reaction of direct dehydrogenation of methanol is a challenging issue due to the thermodynamic restriction. Herein,...

ChemInform Abstract: Thiamine Hydrochloride: An Efficient Catalyst for One-Pot Synthesis of Quinoxaline Derivatives at Ambient Temperature.

ChemInform ◽  
2013 ◽  
Vol 44 (24) ◽  
pp. no-no
Author(s):  
Omprakash B. Pawar ◽  
Fulchand R. Chavan ◽  
Venkat S. Suryawanshi ◽  
Vishnu S. Shinde ◽  
Narayan S. Shinde
Keyword(s):  
Ambient Temperature ◽  
Thiamine Hydrochloride ◽  
One Pot ◽  
Efficient Catalyst ◽  
One Pot Synthesis ◽  
Quinoxaline Derivatives

Catalytic Activity of Dehydrogenation of Methanol to MF over Cu/MCM-41 and Cu-ZnO/MCM-41 Prepared by Impregnation and Grinding

2011 ◽  
Vol 396-398 ◽  
pp. 730-733
Author(s):  
Guo Ru Li ◽  
Gong Li ◽  
Shu Xi Zhou ◽  
Hui Juan Tong
Keyword(s):  
Catalytic Activity ◽  
Atmospheric Pressure ◽  
Molecular Sieves ◽  
Conversion Rate ◽  
Methyl Formate ◽  
Methanol Conversion ◽  
N2 Adsorption ◽  
Flow Microreactor ◽  
Adsorption Desorption ◽  
Mcm 41

Abstract. Using MCM-41 molecular sieves as the support, Cu-ZnO/MCM-41 and Cu/MCM-41 catalysts were prepared by impregnation and grinding. The catalysts were characterized by XRD, N2 adsorption-desorption and TPR methods. The catalytic activity of the dehydrogenation of methanol to methyl formate (MF) was evaluated using the flow microreactor under atmospheric pressure. According to the results, the catalyst prepared by impregnation had a better selectivity for the MF, but a lower methanol conversion rate. However, the product's selectivity could be improved by adding ZnO additive while the methanol conversion rate was reduced. For Cu/MCM-41 prepared by impregnation and grinding, the methanol conversion rate was 20.18% and 24.13% respectively at 250°C and the MF selectivity was 73.75% and 67.35% respectively. Likewise for Cu-ZnO/MCM-41 prepared by impregnation and grinding, the methanol conversion rate was 15.28% and 18.83% respectively at 250°C and the MF selectivity was 81.31% and 75.32% respectively.

scholarly journals Thiamine hydrochloride: An efficient catalyst for one-pot synthesis of quinoxaline derivatives at ambient temperature

2013 ◽  
Vol 125 (1) ◽  
pp. 159-163 ◽  
Author(s):  
OMPRAKASH B PAWAR ◽  
FULCHAND R CHAVAN ◽  
VENKAT S SURYAWANSHI ◽  
VISHNU S SHINDE ◽  
NARAYAN D SHINDE
Keyword(s):  
Ambient Temperature ◽  
Thiamine Hydrochloride ◽  
One Pot ◽  
Efficient Catalyst ◽  
One Pot Synthesis ◽  
Quinoxaline Derivatives

Sodium fluoride as an efficient catalyst for the synthesis of 2,4-disubstituted-1,3-thiazoles and selenazoles at ambient temperature

2014 ◽  
Vol 25 (1) ◽  
pp. 172-175 ◽  
Author(s):  
Janardhan Banothu ◽  
Krishnaiah Vaarla ◽  
Rajitha Bavantula ◽  
Peter A. Crooks
Keyword(s):  
Ambient Temperature ◽  
Sodium Fluoride ◽  
Efficient Catalyst

scholarly journals Zeolite-Templated NiO Nanostructure for Methanol Oxidation Reaction

2018 ◽  
Vol 34 (5) ◽  
pp. 2597-2602
Author(s):  
Daifallah M. Aldhayan
Keyword(s):  
Gas Phase ◽  
Oxidation Reaction ◽  
High Stability ◽  
Methyl Formate ◽  
Catalyst Surface ◽  
Methanol Conversion ◽  
Nano Particles ◽  
Methanol Oxidation Reaction ◽  
Air Oxidation ◽  
Prepared Material

NiO nano particles with particle size of 10.0 to 15.0 nm using zeolite as a template were successfully prepared and loaded (NiO 10 wt.%) on functionalized carbon nanofibers (CNFs). The as-prepared material NiO-CNFs was characterized and tested as an electrocatalyst and a catalyst for the methanol conversion. Electrocatalytic results showed high stability which was evinced by repetitive cycles as a result of catalyst surface activation. Gas phase catalytic tests were carried out at 290oC over NiO-CNFs catalyst in fresh, reduced, and oxidized forms. The results showed that dimethyl ether (DME) and CO2 were obtained as main products. Formaldehyde (FA), methyl formate (MF) and dimethoxymethane (DMM) were obtained as traces. The conversion of methanol in the absence of H2 or O2 over inactivated NiO-CNFs catalyst suggested that DME reacts with the formed H2O to produce CO2. In both cases, reactivation of the catalyst by H2 (reduction) or by Air (oxidation), the conversion was increased indicating a regeneration of the catalyst.

Aqueous Media Preparation of Pyrido[d]pyrimidines Over Calcined TiO2- SiO2 Nanocomposite as an Efficient Catalyst at Ambient Temperature

2019 ◽  
Vol 16 (11) ◽  
pp. 915-921
Author(s):  
Nafiseh Yaltaghian-Khiabani ◽  
Shahrzad Abdolmohammadi ◽  
Sepehr Sadegh-Samiei
Keyword(s):  
Ambient Temperature ◽  
Titanium Dioxide Nanoparticles ◽  
Wide Spectrum ◽  
High Surface ◽  
Aqueous Media ◽  
Reusable Catalyst ◽  
Efficient Catalyst ◽  
X Ray ◽  
Three Component Reaction ◽  
High Yields

Pyridopyrimidines represent a highly important class of compounds which exhibit a wide spectrum of biological properties. Nanoscale metal oxide catalysts have been extensively studied for their application in organic reactions owing to their special features such as high surface area and pore sizes as supports. Titanium dioxide nanoparticles (TiO2 NPs) are an attractive candidate for readily available cheap nanocatalysts, due to their unique properties such as being non-toxic, moisture stable and reusable catalyst. 7-amino-2,4-dioxo-5-aryl-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitriles were synthesized through the reaction of 4(6)-aminouracil, aromatic aldehydes, and malononitrile using calcined TiO2-SiO2 nanocomposite as a reusable catalyst in water at ambient temperature. All the synthesized compounds were well characterized by their elemental analyses, IR, 1H and 13C NMR spectroscopy. The synthesized catalyst was fully characterized by the powder X-ray diffraction (XRD), the scanning electron microcopy (SEM), the transmission electron microscopy (TEM), and the x-ray fluorescence (XRF) techniques. The reaction proceeded through calcined TiO2-SiO2 nanocomposite catalyzed three-component reaction affording twelve target compounds in high yields. This method introduced a novel protocol to provide 7-amino-2,4-dioxo-5-aryl-1,2,3,4-tetrahydropyrido[2,3- d]pyrimidine-6-carbonitrile derivatives and offer several advantages like very simple operation, using inexpensive, recyclable and non-toxic catalyst, mild reaction conditions, high yields of products (92- 98%), short reaction times (2.5-4 h), and green aspects by avoiding toxic catalysts and hazardous solvents.

A highly efficient catalyst system for the isomerization of methyl formate to acetic acid

1988 ◽  
Vol 47 (1) ◽  
pp. 117-121 ◽  
Author(s):  
David J. Schreck ◽  
David C. Busby ◽  
Richard W. Wegman
Keyword(s):  
Acetic Acid ◽  
Methyl Formate ◽  
Catalyst System ◽  
Efficient Catalyst ◽  
Highly Efficient

Copper on the inner surface of mesoporous TiO2 hollow spheres: a highly selective photocatalyst for partial oxidation of methanol to methyl formate

2019 ◽  
Vol 9 (22) ◽  
pp. 6240-6252 ◽  
Author(s):  
Changfu Li ◽  
Xuzhuang Yang ◽  
Guanjun Gao ◽  
Yuanyuan Li ◽  
Weida Zhang ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Methyl Formate ◽  
Hollow Spheres ◽  
Methanol Conversion ◽  
Mesoporous Tio2 ◽  
Oxidation Of Methanol ◽  
Partial Oxidation Of Methanol ◽  
Inner Surface ◽  
Tio2 Hollow Spheres

To raise the methyl formate (MF) selectivity at high methanol conversion is one of the most challenging topics for photocatalytic partial oxidation of methanol to MF.

scholarly journals Ascorbic acid: a naturally green and efficient catalyst for one-pot synthesis of N-aryl-3-aminodihydropyrrol-2-one-4-carboxylates under ambient temperature

2019 ◽  
Vol 9 (6) ◽  
pp. 4458-4462
Keyword(s):  
Ascorbic Acid ◽  
Ambient Temperature ◽  
Low Cost ◽  
Reaction Times ◽  
Acid Synthesis ◽  
One Pot ◽  
Efficient Catalyst ◽  
Benign Nature ◽  
Ascorbic Acid Synthesis ◽  
High Yields

A naturally green and economical ascorbic acid synthesis of N-aryl-3-aminodihydropyrrol-2-one-4-carboxylates has been accomplished via one-pot four-condensation of dialkylacetylenedicarboxylate, formaldehyde and amines (aromatic and aliphatic) under ambient temperature. The notable advantages of the present procedure are green, natural and low-cost catalyst, operational simplicity, eco-friendly, environmentally benign nature, no necessity of chromatographic purification steps, short reaction times and good to high yields.

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