scholarly journals The Implementation of a Carbon Precursor to Produce ZSM-5 Membranes for the Separation of Isomers in the Pervaporation System

ACS Omega ◽  
2019 ◽  
Vol 4 (21) ◽  
pp. 19005-19010
Author(s):  
Abdulaziz A. Alomair ◽  
Yousef Alqaheem
Keyword(s):  
Carbon Precursor ◽  
Separation Of Isomers

Monomethyl and dimethyl ethers of methyl β-D-xylopyranoside

1984 ◽  
Vol 49 (12) ◽  
pp. 2922-2931 ◽  
Author(s):  
Jan Staněk ◽  
Jana Jeřábková ◽  
Jiří Jarý
Keyword(s):  
Partial Methylation ◽  
Separation Of Isomers ◽  
Subsequent Separation ◽  
Single Reaction

The preparative advantages of partial methylation with subsequent separation of isomers over standard syntheses of individual derivatives are presented on the case of the methylation of methyl β-D-xylopyranoside (I). All seven possible methyl ethers were isolated in reasonable yields from a single reaction. Literature data concerning methyl 2,3-di-O-methyl-β-D-xylopyranoside (V) and methyl 2,4-di-O-methyl-β-D-xylopyranoside (VI) have been revised.

Exploring SiC Growth Limitation of Vapor-Liquid-Solid Mechanism when Using Two Different Carbon Precursors

2013 ◽  
Vol 740-742 ◽  
pp. 323-326
Author(s):  
Kassem Alassaad ◽  
François Cauwet ◽  
Davy Carole ◽  
Véronique Soulière ◽  
Gabriel Ferro
Keyword(s):  
Growth Rate ◽  
High Growth ◽  
High Growth Rate ◽  
Carbon Precursor ◽  
Growth Limitation ◽  
Vapor Liquid Solid ◽  
Partial Pressures ◽  
Vapor Liquid Solid Mechanism ◽  
Vls Growth ◽  
Vapor Liquid

Abstract. In this paper, conditions for obtaining high growth rate during epitaxial growth of SiC by vapor-liquid-solid mechanism are investigated. The alloys studied were Ge-Si, Al-Si and Al-Ge-Si with various compositions. Temperature was varied between 1100 and 1300°C and the carbon precursor was either propane or methane. The variation of layers thickness was studied at low and high precursor partial pressure. It was found that growth rates obtained with both methane and propane are rather similar at low precursor partial pressures. However, when using Ge based melts, the use of high propane flux leads to the formation of a SiC crust on top of the liquid, which limits the growth by VLS. But when methane is used, even at extremely high flux (up to 100 sccm), no crust could be detected on top of the liquid while the deposit thickness was still rather small (between 1.12 μm and 1.30 μm). When using Al-Si alloys, no crust was also observed under 100 sccm methane but the thickness was as high as 11.5 µm after 30 min growth. It is proposed that the upper limitation of VLS growth rate depends mainly on C solubility of the liquid phase.

scholarly journals High Throughput Centrifugal Electrospinning of Polyacrylonitrile Nanofibers for Carbon Fiber Nonwovens

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1313
Author(s):  
Andreas Hoffmann ◽  
Alexander J. C. Kuehne
Keyword(s):  
High Throughput ◽  
Carbon Nanofiber ◽  
Fiber Diameter ◽  
Carbon Precursor ◽  
Production Methods ◽  
High Throughput Method ◽  
Radial Forces ◽  
Fiber Deposition ◽  
The Impact ◽  
Pan Fibers

Carbon nanofiber nonwovens are promising materials for electrode or filtration applications; however, their utilization is obviated by a lack of high throughput production methods. In this study, we utilize a highly effective high-throughput method for the fabrication of polyacrylonitrile (PAN) nanofibers as a nonwoven on a dedicated substrate. The method employs rotational-, air pressure- and electrostatic forces to produce fibers from the inner edge of a rotating bell towards a flat collector. We investigate the impact of all above-mentioned forces on the fiber diameter, morphology, and bundling of the carbon-precursor PAN fibers. The interplay of radial forces with collector-facing forces has an influence on the uniformity of fiber deposition. Finally, the obtained PAN nanofibers are converted to carbon nonwovens by thermal treatment.

scholarly journals Energetic carbon precursors for micro-supercapacitor printing

2021 ◽  
Author(s):  
Christin Gellrich ◽  
Stefanie Lochmann ◽  
Thomas Otto ◽  
Julia Grothe ◽  
Stefan Kaskel
Keyword(s):  
High Resolution ◽  
Dicarboxylic Acid ◽  
Line Width ◽  
Carbon Precursor

A highly energetic carbon precursor suitable for soft lithographic processing based on acetylene dicarboxylic acid is presented. High-resolution micro-supercapacitors with line width down to 500 nm are produced using the...

Miscanthus as a carbon precursor for graphene oxide: A possibility influenced by pyrolysis temperature

2021 ◽  
Vol 331 ◽  
pp. 124934
Author(s):  
Yuxin Yan ◽  
Yang Meng ◽  
Haitao Zhao ◽  
Edward Lester ◽  
Tao Wu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Pyrolysis Temperature ◽  
Carbon Precursor

Mesoporous carbonaceous materials prepared from used cigarette filters for efficient phenol adsorption and CO2 capture

RSC Advances ◽  
2015 ◽  
Vol 5 (130) ◽  
pp. 107299-107306 ◽  
Author(s):  
Aibing Chen ◽  
Yonglei Li ◽  
Yifeng Yu ◽  
Yuetong Li ◽  
Linsong Zhang ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Triblock Copolymer ◽  
Carbon Precursor ◽  
Carbonaceous Materials ◽  
Phenol Adsorption ◽  
The Matrix

Mesoporous carbonaceous materials are synthesized using resol as the carbon precursor, triblock copolymer F127 as the template and cigarette filters as the matrix scaffold, and exhibit notable phenol adsorption and CO2 capture.

Understanding in vivo carbon precursor supply for fatty acid synthesis in leaf tissue

2000 ◽  
Vol 22 (1) ◽  
pp. 39-50 ◽  
Author(s):  
Xiaoming Bao ◽  
Manfred Focke ◽  
Mike Pollard ◽  
John Ohlrogge
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Synthesis ◽  
Leaf Tissue ◽  
Acid Synthesis ◽  
Carbon Precursor ◽  
Precursor Supply
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