نتایج جستجو برای: co hydrogenation

تعداد نتایج: 340775  

Journal: :Journal of visualized experiments : JoVE 2015
Andreas Phanopoulos Nicholas Long Philip Miller

Herein we report the synthesis of a tridentate phosphine ligand N(CH2PPh2)3 (N-triphos(Ph)) (1) via a phosphorus based Mannich reaction of the hydroxylmethylene phosphine precursor with ammonia in methanol under a nitrogen atmosphere. The N-triphos(Ph) ligand precipitates from the solution after approximately 1 hr of reflux and can be isolated analytically pure via simple cannula filtration pro...

Journal: :Chem 2021

Summary Converting the greenhouse gas CO2 into higher alcohols (HAs) via hydrogenation reaction requires more attention in C1 chemistry because C2+ alcoholic products are value-added chemicals as fuel additives, solvents, and intermediates. However, chemical inertness of CO2, complexity various routes, uncontrollability C–C coupling from unta...

Journal: :Hydrogen 2023

Single phase CuCoMgAl-layered hydroxides were obtained by making fine adjustment to their composition through changing the (Co + Cu)/Mg = 0.5; 1; 2; 3 and Co/Cu 2 ratios. The rise of in systems contributed increase thermal stability. CuCoMgAl-catalysts showed high selectivity carbonyl group hydrogenation furfural 5-hydroxymethylfurfural. In hydrogenation, furfuryl alcohol was more than 99%, 5-h...

2007
Ingmar Swart André Fielicke David M. Rayner Gerard Meijer Bert M. Weckhuysen Frank M. F. de Groot

Reactions of small molecules with transition metal nanoparticles have attracted considerable interest over the past decades since they can provide a conceptual framework for applications such as heterogeneous catalysis and hydrogen storage . The reaction of H2 and CO with Fe and Co nanoparticles has been widely studied due to the relevance to the Fischer-Tropsch process in which a mixture of H2...

Journal: :Chemical Communications 2021

Fe clusters incorporated in a graphene matrix exhibit photo-assisted increase of 110% reverse water gas shift CO 2 hydrogenation under UV-Vis light irradiation at 120 mW cm ?2 .

Journal: :Nano letters 2012
Viacheslav Iablokov Simon K Beaumont Selim Alayoglu Vladimir V Pushkarev Colin Specht Jinghua Gao A Paul Alivisatos Norbert Kruse Gabor A Somorjai

Model cobalt catalysts for CO(2) hydrogenation were prepared using colloidal chemistry. The turnover frequency at 6 bar and at 200-300 °C increased with cobalt nanoparticle size from 3 to 10 nm. It was demonstrated that near monodisperse nanoparticles in the size range of 3-10 nm could be generated without using trioctylphosphine oxide, a capping ligand that we demonstrate results in phosphorus...

Journal: :Chemical communications 2014
Johannes Schmidt Dipti Sankar Kundu Siegfried Blechert Arne Thomas

Microporous polymer networks based on binaphthyl phosphoric acids are suitable heterogeneous asymmetric organocatalysts. Herein we show that the porous characteristics of such networks can be fine-tuned by co-polymerisation. This enables us to investigate the influence of the surface area and porosity in microporous networks on their catalytic performance. In this case, the activity of the poly...

2017
Wei Chen Ivo A. W. Filot Robert Pestman Emiel J. M. Hensen

Fischer-Tropsch (FT) synthesis is one of the most complex catalyzed chemical reactions in which the chain-growth mechanism that leads to formation of long-chain hydrocarbons is not well understood yet. The present work provides deeper insight into the relation between the kinetics of the FT reaction on a silica-supported cobalt catalyst and the composition of the surface adsorbed layer. Cofeedi...

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