ChemInform Abstract: Direct Conversion of Long-Chain Carboxamides (I) to Alkylammonium Tosylates (III) with Hydroxy(tosyloxy)iodobenzene (II), a Notable Improvement over the Classical Hofmann Reaction.

ChemInform ◽  
1989 ◽  
Vol 20 (15) ◽  
Author(s):  
A. VASUDEVAN ◽  
G. F. KOSER
Keyword(s):  
Direct Conversion ◽  
Long Chain

Mastering a biphasic single-reactor process for direct conversion of glycerol into liquid hydrocarbon fuels

2014 ◽  
Vol 16 (4) ◽  
pp. 2128-2131 ◽  
Author(s):  
V. V. Ordomsky ◽  
A. Y. Khodakov
Keyword(s):  
Aqueous Phase ◽  
Liquid Hydrocarbon ◽  
Direct Conversion ◽  
Tropsch Synthesis ◽  
Hydrocarbon Fuels ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Aqueous Phase Reforming ◽  
Long Chain

Combination of aqueous-phase reforming of glycerol and Fischer–Tropsch synthesis in a single biphasic reactor in the presence of an acid leads to formation of long chain alkanes.

scholarly journals Direct Conversion of Alcohols to Long-Chain Hydrocarbons via Tandem Dehydrogenation-Decarbonylative Olefination

2021 ◽  
Author(s):  
Diana Ainembabazi ◽  
Jonathan Horlyck ◽  
Darren Dolan ◽  
Adam Lee ◽  
Karen Wilson ◽  
...  
Keyword(s):  
Supported Catalysts ◽  
Direct Conversion ◽  
Next Generation ◽  
Liquid Hydrocarbons ◽  
Acid Base ◽  
Pd Catalysts ◽  
Basic Sites ◽  
The Impact ◽  
Long Chain ◽  
Conversion Of Alcohols

<p>Design of active and selective supported catalysts is critical for developing new tandem processes for upgrading biomass-derived alcohols. Hydrogen-free upgrading alcohols to liquid hydrocarbons is desirable for producing drop-in fuel substitutes, but direct and atom-economical processes are yet to be reported. Here we report a novel alcohol upgrading and<b> </b>deoxygenation cascade that meets these criteria. This hydrogen-free cascade is catalyzed by multifunctional Pd catalysts, whose supports feature a range of acid-base properties: primarily basic MgO, acidic Al<sub>2</sub>O<sub>3</sub> and Mg-Al hydrotalcite (HT) with a combination of Lewis acidic and basic sites. The impact of support selection on selectivity offers insights into the design principles for next-generation catalysts for this process and related transformations.</p>

Direct conversion of CO2 to long-chain hydrocarbon fuels over K–promoted CoCu/TiO2 catalysts

2018 ◽  
Vol 311 ◽  
pp. 65-73 ◽  
Author(s):  
Zhibiao Shi ◽  
Haiyan Yang ◽  
Peng Gao ◽  
Xiaopeng Li ◽  
Liangshu Zhong ◽  
...  
Keyword(s):  
Direct Conversion ◽  
Hydrocarbon Fuels ◽  
Long Chain ◽  
Chain Hydrocarbon

scholarly journals Direct Conversion of Alcohols to Long-Chain Hydrocarbons via Tandem Dehydrogenation-Decarbonylative Olefination

2021 ◽  
Author(s):  
Diana Ainembabazi ◽  
Jonathan Horlyck ◽  
Darren Dolan ◽  
Adam Lee ◽  
Karen Wilson ◽  
...  
Keyword(s):  
Supported Catalysts ◽  
Direct Conversion ◽  
Next Generation ◽  
Liquid Hydrocarbons ◽  
Acid Base ◽  
Pd Catalysts ◽  
Basic Sites ◽  
The Impact ◽  
Long Chain ◽  
Conversion Of Alcohols

<p>Design of active and selective supported catalysts is critical for developing new tandem processes for upgrading biomass-derived alcohols. Hydrogen-free upgrading alcohols to liquid hydrocarbons is desirable for producing drop-in fuel substitutes, but direct and atom-economical processes are yet to be reported. Here we report a novel alcohol upgrading and<b> </b>deoxygenation cascade that meets these criteria. This hydrogen-free cascade is catalyzed by multifunctional Pd catalysts, whose supports feature a range of acid-base properties: primarily basic MgO, acidic Al<sub>2</sub>O<sub>3</sub> and Mg-Al hydrotalcite (HT) with a combination of Lewis acidic and basic sites. The impact of support selection on selectivity offers insights into the design principles for next-generation catalysts for this process and related transformations.</p>

scholarly journals Unveiling the Structure Sensitivity for Direct Conversion of Syngas to C2-Oxygenates with a Multicomponent-Promoted Rh Catalyst

2019 ◽  
Vol 150 (2) ◽  
pp. 482-492
Author(s):  
Xiaohui Sun ◽  
Harrie Jansma ◽  
Toshihito Miyama ◽  
Rasika Dasanayake Sanjeewa Aluthge ◽  
Kenichi Shinmei ◽  
...  
Keyword(s):  
Particle Size ◽  
Elevated Temperature ◽  
Direct Conversion ◽  
Molar Ratio ◽  
Methane Formation ◽  
Incipient Wetness Impregnation ◽  
Co Conversion ◽  
Rh Catalyst ◽  
Low Reaction Temperature ◽  
Long Chain

Abstract Mn and Li promoted Rh catalysts supported on SiO2 with a thin TiO2 layer were synthesized by stepwise incipient wetness impregnation approach. The thin TiO2 layer on the surface of SiO2 was proved to stabilize those small Rh nanoparticles and hinder their agglomeration. The reducibility of Rh on these catalysts depends on Rh particle size as well as the position of manganese oxide, and large Rh nanoparticles with MnO on Rh nanoparticles can be only reduced at an elevated temperature. Catalyst with large Rh particles exhibits a higher CO conversion and higher products selectivity towards long chain hydrocarbons and C2-oxygenates at the expense of decreasing methane formation than a similar catalyst with smaller Rh particles. This was attributed to the synergistic effect of Mn and Li promotion and molar ratio between Rh0 and Rhδ+ sites on the surface of Rh nanoparticles. Moreover, Rh nanoparticles on MnO are proved to be more efficient in promoting hydrogenation of acetaldehyde to ethanol than its counterpart with MnO on Rh nanoparticles. Finally, in order to target high C2-oxygenates selectivity, low reaction temperature together with a low H2/CO ratio in the feed is recommended. Graphic Abstract

Use of the Magnetostatic Analogue In Electromagnetic Lens Engineering

1970 ◽  
Vol 28 ◽  
pp. 360-361
Author(s):  
John W. Coleman
Keyword(s):  
Boundary Conditions ◽  
High Performance ◽  
Force Fields ◽  
Optical Design ◽  
Direct Conversion ◽  
Design Engineering ◽  
Design Data ◽  
Scalar Potentials ◽  
Geometric Elements ◽  
At Will

In the design engineering of high performance electromagnetic lenses, the direct conversion of electron optical design data into drawings for reliable hardware is oftentimes difficult, especially in terms of how to mount parts to each other, how to tolerance dimensions, and how to specify finishes. An answer to this is in the use of magnetostatic analytics, corresponding to boundary conditions for the optical design. With such models, the magnetostatic force on a test pole along the axis may be examined, and in this way one may obtain priority listings for holding dimensions, relieving stresses, etc..The development of magnetostatic models most easily proceeds from the derivation of scalar potentials of separate geometric elements. These potentials can then be conbined at will because of the superposition characteristic of conservative force fields.

Polymer Morphology Revealed by Staining Techniques

1981 ◽  
Vol 39 ◽  
pp. 340-341
Author(s):  
A. C. Reimschuessel ◽  
V. Kramer
Keyword(s):  
Polymer Melt ◽  
Nylon 6 ◽  
Morphological Features ◽  
Negative Staining ◽  
Polymer Morphology ◽  
Crystallizable Polymer ◽  
Staining Techniques ◽  
Long Chain

Staining techniques can be used for either the identification of different polymers or for the differentiation of specific morphological domains within a given polymer. To reveal morphological features in nylon 6, we choose a technique based upon diffusion of the staining agent into accessible regions of the polymer.When a crystallizable polymer - such as nylon 6 - is cooled from the melt, lamellae form by chainfolding of the crystallizing long chain macromolecules. The regions between adjacent lamellae represent the less ordered amorphous domains into which stain can diffuse. In this process the lamellae will be “outlined” by the dense stain, giving rise to contrast comparable to that obtained by “negative” staining techniques.If the cooling of the polymer melt proceeds relatively slowly - as in molding operations - the lamellae are usually arranged in a radial manner. This morphology is referred to as spherulitic.

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