Carbon deposition mechanism and structural changes for zeolite-templated carbons

2021 ◽  
pp. 111311
Author(s):  
Ying Liu ◽  
Jiaxin Wang ◽  
Mohamed A. Serageldin ◽  
Tao Wang ◽  
Wei-Ping Pan
Keyword(s):  
Structural Changes ◽  
Carbon Deposition ◽  
Deposition Mechanism

Anti-carbon deposition mechanism of H2O on nickel-based anode of SOFC: A ReaxFF molecular modelling

2020 ◽  
Vol 45 (56) ◽  
pp. 32423-32432
Author(s):  
Sheng Wu ◽  
Xintong Chen ◽  
Yunzhuo Jiang ◽  
Guanlun Guo ◽  
Bin Huang ◽  
...  
Keyword(s):  
Molecular Modelling ◽  
Carbon Deposition ◽  
Deposition Mechanism

New insights into carbon deposition mechanism of nickel/yttrium-stabilized zirconia cermet from methane by in situ investigation

2019 ◽  
Vol 256 ◽  
pp. 113910 ◽  
Author(s):  
Fangyong Yu ◽  
Jie Xiao ◽  
Yapeng Zhang ◽  
Weizi Cai ◽  
Yongmin Xie ◽  
...  
Keyword(s):  
Carbon Deposition ◽  
Stabilized Zirconia ◽  
Deposition Mechanism ◽  
In Situ Investigation ◽  
Zirconia Cermet

A Raman spectroscopic study of the carbon deposition mechanism on Ni/CGO electrodes during CO/CO2 electrolysis

2014 ◽  
Vol 16 (26) ◽  
pp. 13063-13068 ◽  
Author(s):  
V. Duboviks ◽  
R. C. Maher ◽  
M. Kishimoto ◽  
L. F. Cohen ◽  
N. P. Brandon ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Carbon Deposition ◽  
Ex Situ ◽  
Deposition Mechanism ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Electrolyte Interface ◽  
Co2 Electrolysis

In situ and ex situ Raman analyses of porous Ni/CGO electrodes reveal differences in the amount, location and type of carbon formed during CO/CO2 electrolysis. The majority of the carbon forms in the region of the anode, which lies in the range of ca. 4 micrometers from the electrode–electrolyte interface.

scholarly journals Carbon deposition mechanism of molten salt cleaning and optimization of multicomponent molten salt formula for remanufacturing

2021 ◽  
Vol 104 (3) ◽  
pp. 003685042110310
Author(s):  
Shuo Zhang ◽  
Shanguo Zhang ◽  
Jianyong Li ◽  
Jianfeng Li ◽  
Xin Zhou ◽  
...  
Keyword(s):  
Molten Salt ◽  
Adsorption Mechanism ◽  
Carbon Deposition ◽  
Salt Bath ◽  
Storage Medium ◽  
Optimal Process ◽  
Deposition Mechanism ◽  
Low Viscosity ◽  
Key Factor ◽  
New Formula

In remanufacturing engineering, cleaning is the key factor for subsequent blank inspection and parts repair. Molten salt has the characteristics of low viscosity, good fluidity, and strong chemical stability. Salt bath cleaning can be comprehensively applied to remove various organic pollutants. Molten salt has the function of self-cleaning. The dirt in the cleaning pool can be decomposed and reused. Moreover, the waste molten salt is massive, and the waste residue is easy to treat. The formation and adsorption mechanism of carbon deposition was explored, and the formation mechanism of carbon deposition was verified by experiments. Then, the existing formula was improved by mixing experiment and compared with the current cleaning method; the cleaning effect was excellent. A new molten salt formula is proposed on the basis of the research on solar thermal storage medium. The composition percentage and the optimal process parameters of the new molten salt formula were determined on the basis of the experimental design of mixture. The cleaning effect of the new formula is good.

Chemical Vapor Deposition (CVD) of ZrC Coatings from ZrCl4-C3H6-H2

2011 ◽  
Vol 189-193 ◽  
pp. 648-652 ◽  
Author(s):  
Qiao Mu Liu ◽  
Li Tong Zhang ◽  
Zhi Xin Meng ◽  
Lai Fei Cheng
Keyword(s):  
Chemical Vapor Deposition ◽  
Carbon Content ◽  
Flow Rate ◽  
Vapor Deposition ◽  
Deposition Temperature ◽  
Carbon Deposition ◽  
Rough Surfaces ◽  
Chemical Vapor ◽  
Deposition Mechanism ◽  
Spherical Structure

ZrC coatings were prepared by CVD using ZrCl4, C3H6, and H2as the precursors. The mechanisms responsible for the effects of deposition temperature, H2flow rate and inlet C/Zr ratio on the ZrC coatings were studied based on the deposition mechanism of ZrC. The results indicate that the ZrC morphologies change from a loose spherical structure to a cauliflower structure, then to a glassy structure as the deposition temperature increases from 1050°C to 1150°C, then to 1250°C. The carbon content in the ZrC coatings increases with increasing the deposition temperature. Higher inlet C/Zr ratio can lead to rough surfaces and higher carbon content. Reasonable H2concentration can inhibit carbon deposition, and lead to a cauliflower structure.

Fine Structural Changes in the Microvasculature of the Mouse Pinna: Aging and Radiation Injury

1974 ◽  
Vol 32 ◽  
pp. 54-55
Author(s):  
S. Phyllis Steamer ◽  
Rosemarie L. Devine
Keyword(s):  
Structural Changes ◽  
Radiation Treatment ◽  
Arterial Stenosis ◽  
Ultrastructural Changes ◽  
Vascular Effects ◽  
Microvascular Changes ◽  
Surrounding Connective Tissue ◽  
Fission Neutrons ◽  
Total Body

The importance of radiation damage to the skin and its vasculature was recognized by the early radiologists. In more recent studies, vascular effects were shown to involve the endothelium as well as the surrounding connective tissue. Microvascular changes in the mouse pinna were studied in vivo and recorded photographically over a period of 12-18 months. Radiation treatment at 110 days of age was total body exposure to either 240 rad fission neutrons or 855 rad 60Co gamma rays. After in vivo observations in control and irradiated mice, animals were sacrificed for examination of changes in vascular fine structure. Vessels were selected from regions of specific interest that had been identified on photomicrographs. Prominent ultrastructural changes can be attributed to aging as well as to radiation treatment. Of principal concern were determinations of ultrastructural changes associated with venous dilatations, segmental arterial stenosis and tortuosities of both veins and arteries, effects that had been identified on the basis of light microscopic observations. Tortuosities and irregularly dilated vein segments were related to both aging and radiation changes but arterial stenosis was observed only in irradiated animals.

Evaluation of single-electron movies of glutamine synthetase molecules

1983 ◽  
Vol 41 ◽  
pp. 280-281
Author(s):  
W. Kunath ◽  
E. Zeitler ◽  
M. Kessel
Keyword(s):  
Electron Microscope ◽  
Glutamine Synthetase ◽  
Electron Irradiation ◽  
Structural Damage ◽  
Structural Changes ◽  
Single Electron ◽  
Continuous Series ◽  
Digital Recording ◽  
Recording Device ◽  
Low Exposure

The features of digital recording of a continuous series (movie) of singleelectron TV frames are reported. The technique is used to investigate structural changes in negatively stained glutamine synthetase molecules (GS) during electron irradiation and, as an ultimate goal, to look for the molecules' “undamaged” structure, say, after a 1 e/Å2 dose.The TV frame of fig. la shows an image of 5 glutamine synthetase molecules exposed to 1/150 e/Å2. Every single electron is recorded as a unit signal in a 256 ×256 field. The extremely low exposure of a single TV frame as dictated by the single-electron recording device including the electron microscope requires accumulation of 150 TV frames into one frame (fig. lb) thus achieving a reasonable compromise between the conflicting aspects of exposure time per frame of 3 sec. vs. object drift of less than 1 Å, and exposure per frame of 1 e/Å2 vs. rate of structural damage.

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