Catalytic Degradation of Heptaldehyde in Vapor Phase

1943 ◽  
Vol 65 (6) ◽  
pp. 1243-1245 ◽  
Author(s):  
T. J. Suen ◽  
Simone Fan
Keyword(s):  
Vapor Phase ◽  
Catalytic Degradation

Vapor phase catalytic degradation studies of diethyl sulfide with MnO/Zeolite‐13X catalysts in presence of air

2018 ◽  
Vol 37 (5) ◽  
pp. 1705-1712 ◽  
Author(s):  
Chowdam Ramakrishna ◽  
T. Gopi ◽  
S. Chandra Shekar ◽  
A. K. Gupta ◽  
Racharla Krishna
Keyword(s):  
Vapor Phase ◽  
Catalytic Degradation ◽  
Diethyl Sulfide ◽  
Zeolite 13X ◽  
Degradation Studies

Vapor phase catalytic degradation of bis(2-chloroethyl) ether on supported vanadia–titania catalyst

2011 ◽  
Vol 103 (1-2) ◽  
pp. 11-20 ◽  
Author(s):  
S. Chandra Shekar ◽  
Keshav Soni ◽  
Rajendra Bunkar ◽  
Manoj Sharma ◽  
Beer Singh ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Catalytic Degradation

Planar defects in ordered (Ga,In)P

1988 ◽  
Vol 46 ◽  
pp. 902-903
Author(s):  
S. McKernan ◽  
C. B. Carter ◽  
D. Bour ◽  
J. R. Shealy
Keyword(s):  
Electron Diffraction ◽  
Vapor Phase ◽  
Growth Direction ◽  
High Density ◽  
Ordered Structure ◽  
Planar Defects ◽  
Diffraction Patterns ◽  
Ternary Semiconductors ◽  
Anion Species ◽  
Metallic Vapor

The growth of ternary III-V semiconductors by organo-metallic vapor phase epitaxy (OMVPE) is widely practiced. It has been generally assumed that the resulting structure is the same as that of the corresponding binary semiconductors, but with the two different cation or anion species randomly distributed on their appropriate sublattice sites. Recently several different ternary semiconductors including AlxGa1-xAs, Gaxln-1-xAs and Gaxln1-xP1-6 have been observed in ordered states. A common feature of these ordered compounds is that they contain a relatively high density of defects. This is evident in electron diffraction patterns from these materials where streaks, which are typically parallel to the growth direction, are associated with the extra reflections arising from the ordering. However, where the (Ga,ln)P epilayer is reasonably well ordered the streaking is extremely faint, and the intensity of the ordered spot at 1/2(111) is much greater than that at 1/2(111). In these cases it is possible to image relatively clearly many of the defects found in the ordered structure.

Photo-catalytic degradation of gaseous pollutants in paper mills of southern China

TAPPI Journal ◽  
2018 ◽  
Vol 17 (03) ◽  
pp. 167-178 ◽  
Author(s):  
Xin Tong ◽  
Jiao Li ◽  
Jun Ma ◽  
Xiaoquan Chen ◽  
Wenhao Shen
Keyword(s):  
Degradation Rate ◽  
Southern China ◽  
Catalytic Degradation ◽  
Pulp And Paper ◽  
Gaseous Pollutants ◽  
Pulp And Paper Mills ◽  
Paper Mills ◽  
Initial Concentration ◽  
First Order ◽  
First Order Kinetics

Studies were undertaken to evaluate gaseous pollutants in workplace air within pulp and paper mills and to consider the effectiveness of photo-catalytic treatment of this air. Ambient air at 30 sampling sites in five pulp and paper mills of southern China were sampled and analyzed. The results revealed that formaldehyde and various benzene-based molecules were the main gaseous pollutants at these five mills. A photo-catalytic reactor system with titanium dioxide (TiO2) was developed and evaluated for degradation of formaldehyde, benzene and their mixtures. The experimental results demonstrated that both formaldehyde and benzene in their pure forms could be completely photo-catalytic degraded, though the degradation of benzene was much more difficult than that for formaldehyde. Study of the photo-catalytic degradation kinetics revealed that the degradation rate of formaldehyde increased with initial concentration fitting a first-order kinetics reaction. In contrast, the degradation rate of benzene had no relationship with initial concentration and degradation did not conform to first-order kinetics. The photo-catalytic degradation of formaldehyde-benzene mixtures indicated that formaldehyde behaved differently than when treated in its pure form. The degradation time was two times longer and the kinetics did not reflect a first-order reaction. The degradation of benzene was similar in both pure form and when mixed with formaldehyde.

191. Planar Waveguide Interferometers for Vapor Phase Sensing

1999 ◽  
Author(s):  
C. Joseph ◽  
D. Campbell ◽  
J. Suggs ◽  
J. Moore ◽  
N. Hartman
Keyword(s):  
Vapor Phase ◽  
Planar Waveguide

"PURIFICATION EFFECTS" IN ZINC SELENIDE CRYSTALS DOPED WITH YTTERBIUM FROM VAPOR PHASE

2016 ◽  
Vol 75 (3) ◽  
pp. 279-284 ◽  
Author(s):  
V. P. Makhniy ◽  
O. V. Kinzersky ◽  
I. M. Senko
Keyword(s):  
Zinc Selenide ◽  
Vapor Phase

Solvent-Free Powder Synthesis and MOF-CVD Thin Films of the Mesoporous Metal-Organic Framework MAF-6

2019 ◽  
Author(s):  
Timothée Stassin ◽  
Ivo Stassen ◽  
Joao Marreiros ◽  
Alexander John Cruz ◽  
Rhea Verbeke ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Metal Organic Framework ◽  
Chemical Vapor ◽  
Uptake Capacity ◽  
Powder Synthesis ◽  
Crystalline Films ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
First Time ◽  
Organic Framework

A simple solvent- and catalyst-free method is presented for the synthesis of the mesoporous metal-organic framework (MOF) MAF-6 (RHO-Zn(eIm)2) based on the reaction of ZnO with 2-ethylimidazole vapor at temperatures ≤ 100 °C. By translating this method to a chemical vapor deposition (CVD) protocol, mesoporous crystalline films could be deposited for the first time entirely from the vapor phase. A combination of PALS and Kr physisorption measurements confirmed the porosity of these MOF-CVD films and the size of the MAF-6 supercages (diam. ~2 nm), in close agreement with powder data and calculations. MAF-6 powders and films were further characterized by XRD, TGA, SEM, FTIR, PDF and EXAFS. The exceptional uptake capacity of the mesoporous MAF-6 in comparison to the microporous ZIF-8 is demonstrated by vapor-phase loading of a molecule larger than the ZIF-8 windows.

Sign in / Sign up

Export Citation Format

Share Document