PERMEABILITY STUDIES: IV. SURFACE AREA MEASUREMENTS OF ZINC OXIDE AND POTASSIUM CHLORIDE POWDERS

1949 ◽  
Vol 27a (6) ◽  
pp. 207-212 ◽  
Author(s):  
J. C. Arnell
Keyword(s):  
Zinc Oxide ◽  
Low Temperature ◽  
Potassium Chloride ◽  
Surface Area ◽  
Satisfactory Agreement ◽  
Fine Powders ◽  
Zinc Oxides ◽  
Adsorption Data ◽  
Permeability Studies

The use of the modified Kozeny equation for the measurement of the specific surfaces of fine powders has been extended to include a number of standard zinc oxides and a sample of potassium chloride. The specific surfaces of the zinc oxides had been measured by 10 other methods, and the data are included for comparison. Comparative low temperature adsorption data for the potassium chloride are also given. Satisfactory agreement with other methods was found.

PERMEABILITY STUDIES: III. SURFACE AREA MEASUREMENTS OF CARBON BLACKS

1948 ◽  
Vol 26a (2) ◽  
pp. 29-38 ◽  
Author(s):  
J. C. Arnell ◽  
G. O. Henneberry
Keyword(s):  
Electron Microscope ◽  
Low Temperature ◽  
Carbon Black ◽  
Surface Area ◽  
Satisfactory Agreement ◽  
Nitrogen Adsorption ◽  
Average Particle ◽  
Carbon Blacks ◽  
Permeability Studies ◽  
Nitrogen Adsorption Isotherms

The modified Kozeny equation has been found to be satisfactory for the measurement of the specific surfaces of carbon blacks having average particle diameters ranging from 0.01 to 0.1 μ to within ±10%. Comparative data were obtained from electron microscope counting and from low temperature nitrogen adsorption isotherms. The three methods examined gave results that were in satisfactory agreement, except when the carbon black was porous, and then the adsorption value was extremely large.

scholarly journals Hydrogen Adsorption Properties of Nano- and Microstructures of ZnO

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Rizwan Wahab ◽  
Farheen Khan ◽  
Naushad Ahmad ◽  
Hyung-Shik Shin ◽  
Javed Musarrat ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Low Temperature ◽  
Surface Area ◽  
Hydrogen Adsorption ◽  
Solution Process ◽  
Adsorption Properties ◽  
Thin Sheets ◽  
Wurtzite Phase ◽  
Adsorption Studies

Nanoparticles, microflowers, and microspheres of zinc oxide have been synthesized in a large quantity via solution process at low temperature and were tested for the hydrogen adsorption studies. The experiments were carried out using Sievert’s apparatus which resulted in highest hydrogen adsorption value for nanoparticles is ~1.220 wt%, whereas for microflower composed with thin sheets value reduced (~1.011 wt%) but in case of microspheres composed with nanoparticles having below one wt% (~0.966 wt%). The FE-SEM and XRD clarify that the obtained products are crystalline with wurtzite phase. Including morphological and crystalline characterization, the surface area of the prepared nano- and microstructures was observed with BET.

Preparation and Reactivity Test of Nano Size ZnO for Removal of H2S and COS in a Gasified Fuel Gas

2007 ◽  
Vol 124-126 ◽  
pp. 1003-1006 ◽  
Author(s):  
No Kuk Park ◽  
Yu Jin Lee ◽  
Gi Bo Han ◽  
Si Ok Ryu ◽  
Tae Jin Lee
Keyword(s):  
Zinc Oxide ◽  
Surface Area ◽  
Absorption Rate ◽  
Packed Bed ◽  
Zinc Nitrate ◽  
Packed Bed Reactor ◽  
Fuel Gas ◽  
Zinc Oxides ◽  
Reactivity Test ◽  
Nano Size

A nano-size zinc oxide was formulated for the effective removal of a very low concentration of sulfur compounds (H2S, COS) contained in a gasified fuel gas and their reactivity was also investigated in this study. They were prepared by a matrix-assisted method with various precursors. An active carbon was used for a matrix and zinc nitrate, zinc chloride, and zinc sulfate were selected as precursors. Zinc nitrate was the best precursor for the formulation of the nano-size zinc oxide in the experiments. The size of the formulated nano-size zinc oxides was in the range of 20-30 nm and its surface area was about 56.2 m2/g. From TGA(thermal gravity analysis) test, it was found that its sulfur capacity was about 5.83 gS/100 g-sorbent and sulfur absorption rate was about 0.363 gS/min·100 g-sorbent. Their reactivity increased with the smaller size and the larger surface area of the sorbents. Most prepared nano-size zinc oxides showed an excellent performance for the removal of not only H2S but also COS. Their absorption rate was faster than commercial zinc oxides. In order to investigate the sulfur absorption characteristics of zinc oxide, a experiments for the nano-size zinc oxides formulated from zinc nitrate precursors were carried out in a packed-bed reactor system over the temperature of 500 . It was concluded that the zinc oxide prepared by zinc nitrate as a precursor showed the highest sulfur removing capacity.

PERMEABILITY STUDIES: II. SURFACE AREA MEASUREMENTS OF INORGANIC PIGMENT POWDERS

1947 ◽  
Vol 25a (4) ◽  
pp. 191-209 ◽  
Author(s):  
J. C. Arnell
Keyword(s):  
Experimental Data ◽  
Electron Microscope ◽  
Specific Surface ◽  
Surface Area ◽  
Satisfactory Agreement ◽  
Surface Measurement ◽  
Inorganic Pigments ◽  
Inorganic Pigment ◽  
Permeability Studies

The modified Kozeny equation has been found to be satisfactory for the measurement of the specific surface of inorganic pigments having particle diameters of the order of 0.1 to 0.2 µ to within ±10%. These powders were too fine for visual microscope counting or standard sedimentation methods of specific surface measurement. The results obtained from experimental data were checked against those calculated from electron microscope counting for two of the powders studied and found to be in satisfactory agreement.

Study on Properties of Low-Temperature-Prepared Zinc Oxide-Based Inverted Organic Solar Cells and Improvement of their Photodurability

2021 ◽  
Author(s):  
Masahiro Nakano ◽  
Sae Nakagawa ◽  
Fumiya Sato ◽  
Md. Shahiduzzaman ◽  
Makoto Karakawa ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Solar Cells ◽  
Low Temperature ◽  
Organic Solar Cells

Low-Temperature Thermal Expansion of Zinc Oxide. Vibrations in Zinc Oxide and Sphalerite Zinc Sulfide

1971 ◽  
Vol 4 (4) ◽  
pp. 1314-1323 ◽  
Author(s):  
B. Yates ◽  
R. F. Cooper ◽  
M. M. Kreitman
Keyword(s):  
Zinc Oxide ◽  
Thermal Expansion ◽  
Low Temperature ◽  
Zinc Sulfide

Modification of a polymer gate insulator by zirconium oxide doping for low temperature, high performance indium zinc oxide transistors

RSC Advances ◽  
2014 ◽  
Vol 4 (86) ◽  
pp. 45742-45748 ◽  
Author(s):  
Byeong-Geun Son ◽  
So Yeon Je ◽  
Hyo Jin Kim ◽  
Jae Kyeong Jeong
Keyword(s):  
Zinc Oxide ◽  
Low Temperature ◽  
Zirconium Oxide ◽  
High Performance ◽  
Gate Insulator ◽  
Indium Zinc Oxide
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