Preferential synthesis of ethanol from syngas via dimethyl oxalate hydrogenation over an integrated catalyst

2019 ◽  
Vol 55 (39) ◽  
pp. 5555-5558 ◽  
Author(s):  
Xin Shang ◽  
Huijiang Huang ◽  
Qiao Han ◽  
Yan Xu ◽  
Yujun Zhao ◽  
...  
Keyword(s):  
Gas Phase ◽  
High Selectivity ◽  
Dimethyl Oxalate ◽  
Preferential Synthesis

A novel, simple and efficient integrated catalyst exhibits an extremely high selectivity of 98% to ethanol in gas-phase hydrogenation of dimethyl oxalate.

A Fe5C2 nanocatalyst for the preferential synthesis of ethanol via dimethyl oxalate hydrogenation

2017 ◽  
Vol 53 (39) ◽  
pp. 5376-5379 ◽  
Author(s):  
Jia He ◽  
Yujun Zhao ◽  
Yue Wang ◽  
Junhu Wang ◽  
Jian Zheng ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Gas Phase ◽  
High Selectivity ◽  
Dimethyl Oxalate ◽  
Preferential Synthesis

The Fe5C2 nanocatalyst exhibits excellent catalytic activity with a significantly high selectivity of 89.6% to ethanol in gas-phase hydrogenation of dimethyl oxalate.

Structured Pd–Au/Cu-fiber catalyst for gas-phase hydrogenolysis of dimethyl oxalate to ethylene glycol

2015 ◽  
Vol 51 (52) ◽  
pp. 10547-10550 ◽  
Author(s):  
Li Zhang ◽  
Lupeng Han ◽  
Guofeng Zhao ◽  
Ruijuan Chai ◽  
Qiaofei Zhang ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Gas Phase ◽  
Dimethyl Oxalate

A structured Pd–Au/Cu-fiber with a ternary Pd–Au–Cu+ complex is active, selective and stable for the gas-phase hydrogenolysis of dimethyl oxalate to ethylene glycol.

Rates of Reactions Between Methoxycarbonyl, Methyl and Methoxy Radicals Formed in Flash Photolysis of Dimethyl Oxalate in Gas Phase

2010 ◽  
Vol 92 (10) ◽  
pp. 847-847 ◽  
Author(s):  
E. Hassinen ◽  
P. Riepponen ◽  
K. Blomqvist ◽  
K. Kalliorinne ◽  
J. Koskikallio
Keyword(s):  
Gas Phase ◽  
Flash Photolysis ◽  
Methoxy Radicals ◽  
Dimethyl Oxalate

A Ni-foam-structured MoNi4–MoOx nanocomposite catalyst for hydrogenation of dimethyl oxalate to ethanol

2020 ◽  
Vol 56 (5) ◽  
pp. 806-809 ◽  
Author(s):  
Jian Zhu ◽  
Weidong Sun ◽  
Song Wang ◽  
Guofeng Zhao ◽  
Ye Liu ◽  
...  
Keyword(s):  
Gas Phase ◽  
Ni Foam ◽  
Dimethyl Oxalate ◽  
Highly Active ◽  
Nanocomposite Catalyst

A Ni-foam structured MoNi4–MoOx nanocomposite catalyst is highly active, selective and stable for the gas-phase hydrogenation of dimethyl oxalate to ethanol.

scholarly journals Thermolysis of 2,2-dimethoxy-5,5-dimethyl- Δ3- 1,3,4- oxadiazoline studied with photoelectron spectroscopy. He(I) photoelectron spectrum of dimethoxycarbene

1998 ◽  
Vol 76 (2) ◽  
pp. 238-240
Author(s):  
H M Muchall ◽  
N H Werstiuk ◽  
B Choudhury ◽  
J Ma ◽  
J Warkentin ◽  
...  
Keyword(s):  
Heat Source ◽  
Gas Phase ◽  
Photoelectron Spectroscopy ◽  
Photoelectron Spectrum ◽  
Ionization Potentials ◽  
Perfect Agreement ◽  
Dimethyl Oxalate ◽  
Orbital Energies ◽  
Vertical Ionization Potentials ◽  
Experimental Values

Gas phase thermolysis of 2,2-dimethoxy-5,5-dimethyl- Δ3-1,3,4-oxadiazoline (1) in an ultraviolet photoelectron spectrometer by means of a CW CO2 laser as directed heat source at 26 W gave a complex PE spectrum that included ionization bands belonging to acetone, tetramethoxyethylene (3), and dimethyl oxalate (4). Subtraction of the spectra of acetone, 3, and 4 from the pyrolysis spectrum of 1 left a simple PE spectrum that is attributed to dimethoxycarbene (2) along with some ethane. ecke3LYP/6-31+G* calculations gave first adiabatic and vertical ionization potentials of 2 as well as orbital energies that are in perfect agreement with experimental values. From the available experimental and calculational data, 2 is assumed to adopt a w conformation.Key words: dimethoxycarbene, 2,2-dimethoxy- Δ3-1,3,4-oxadiazoline, tetramethoxyethylene, He(I) photoelectron spectroscopy, thermolysis.

Gas phase hydrodeoxygenation of anisole and guaiacol to aromatics with a high selectivity over Ni-Mo/SiO2

2017 ◽  
Vol 102 ◽  
pp. 127-130 ◽  
Author(s):  
Tao He ◽  
Xinxin Liu ◽  
Yuanzheng Ge ◽  
Dezhi Han ◽  
Jianqing Li ◽  
...  
Keyword(s):  
Gas Phase ◽  
High Selectivity

Comparison of the selectivity of [M(12-Crown-4)]+ (M=Li+, Na+, K+) complexes for halide anions and some neutral molecules; a computational study

2015 ◽  
Vol 14 (08) ◽  
pp. 1550057 ◽  
Author(s):  
Faranak Dastineh ◽  
Sadegh Salehzadeh ◽  
Mehdi Bayat ◽  
Yazdan Maghsoud
Keyword(s):  
Interaction Energy ◽  
Gas Phase ◽  
High Selectivity ◽  
Theoretical Study ◽  
Computational Study ◽  
Decomposition Analysis ◽  
Interaction Energies ◽  
Halide Anions ◽  
Bonding Interaction ◽  
M 12

A theoretical study on the selectivity of a series of [M(12C4)][Formula: see text] (M = Li[Formula: see text], Na[Formula: see text], K[Formula: see text], 12C4 = 12-crown-4) complexes for F[Formula: see text], Cl[Formula: see text] and Br[Formula: see text] anions and a number of neutral molecules (CH3CN, CH3OH, NH3, H2O, py, and 12C4) is reported. At first, it was shown that in the gas phase among all studied halide anions and neutral molecules, halides have much more bonding interaction with all [M(12C4)][Formula: see text] cations. Calculated interaction energies of above anions and [M(12C4)][Formula: see text] cations decrease from F[Formula: see text] to Br[Formula: see text]. Also the interaction energy of halide anions with [M(12C4)][Formula: see text] complexes, decreases from [Li(12C4)][Formula: see text] to [K(12C4)][Formula: see text]. The electron decomposition analysis showed that the bond between [M(12C4)][Formula: see text] complexes and both the neutral and anion guests is mainly electrostatic in nature. Then the selectivity of [M(12C4)][Formula: see text] complexes for studied anions and neutral molecules are compared in methanol, acetone, acetonitrile, and nitromethane solutions. It was shown that both the desolvation process of reactants and the strength of host–guest interactions have significant effect on the selectivities. Thus the selectivity of [Li(12C4)][Formula: see text] cation for NH3and H2O neutral molecules in solution, in contrast to the gas phase, is higher than that for bromide anion. The results of calculations showed that all [M(12C4)][Formula: see text] complexes, specially [Li(12C4)][Formula: see text], have high selectivity for F[Formula: see text] over other halide anions and neutral molecules.

Cu-fiber-structured La2O3–PdAu(alloy)–Cu nanocomposite catalyst for gas-phase dimethyl oxalate hydrogenation to ethylene glycol

2016 ◽  
Vol 6 (19) ◽  
pp. 7024-7028 ◽  
Author(s):  
Lupeng Han ◽  
Guofeng Zhao ◽  
Yanfei Chen ◽  
Jian Zhu ◽  
Pengjing Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ethylene Glycol ◽  
Gas Phase ◽  
Dimethyl Oxalate ◽  
Nanocomposite Catalyst

A Cu-fiber-structured La2O3–PdAu(alloy)–Cu nanocomposite catalyst is low-temperature active, selective and stable for gas-phase dimethyl oxalate hydrogenation to ethylene glycol.

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