scholarly journals Structural Analysis of Micropores of Starches by Moisture Adsorption-Desorption Method.

1992 ◽  
Vol 39 (4) ◽  
pp. 271-276
Author(s):  
Keito BOKI ◽  
Naohito KAWASAKI ◽  
Kazuo MINAMI
Keyword(s):  
Structural Analysis ◽  
Moisture Adsorption ◽  
Adsorption Desorption ◽  
Desorption Method

Study on Pore Structure of Seaweed Particles After Combustion

2016 ◽  
Vol 138 (5) ◽  
Author(s):  
Shannan Xu ◽  
Shuang Wang ◽  
Zhe Zhang ◽  
Chunhou Li ◽  
Xiumin Jiang
Keyword(s):  
Structural Analysis ◽  
Fluidized Bed ◽  
Fractal Analysis ◽  
Bottom Ash ◽  
N2 Adsorption ◽  
Mercury Intrusion ◽  
Comprehensive Utilization ◽  
Adsorption Desorption ◽  
Internal Pore ◽  
Desorption Method

In this work, the particles of two seaweeds, Enteromorpha clathrata (E. clathrata) (EN) and Sargassum natans (S. natans), were combusted in a fluidized bed. It was found that while combustion of EN particles was stable, there was a substantial slagging period during the combustion of S. natans particles. Seaweed and its bottom ash samples were collected, and their pore structures were determined with both mercury intrusion method and N2 adsorption–desorption method. The structural analysis revealed that the number of porosity, pore volume, and specific surface area was all increased and the internal pore in ash samples was expanded after combustion. Fractal analysis showed that while the surface of original seaweed was smooth, it became irregular and rough after combustion. This study has suggested that the ash of seaweeds with porous structure can be valuable for comprehensive utilization.

Preparation, Characterization and Photocatalytic Activity of F, Fe-Codoped Nano-TiO2

2013 ◽  
Vol 448-453 ◽  
pp. 169-173
Author(s):  
Chun Yan Yan ◽  
Wen Tao Yi
Keyword(s):  
Photocatalytic Activity ◽  
Diffuse Reflectance Spectroscopy ◽  
Uv Light ◽  
Hydrothermal Process ◽  
Neutral Red ◽  
Reaction Model ◽  
X Ray Diffraction ◽  
Pseudo First Order Reaction ◽  
Adsorption Desorption ◽  
Desorption Method

Pure and F, Fe-codoped TiO2 were prepared by sol-hydrothermal process, in which titanium (IV) n-butoxide, Fe (NO3)2·6H2O and NH4F were used as precursors. And the samples were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), and N2 adsorption-desorption method. The results showed that the F, Fe-codoped samples were principally single-phase anatase structures, and the particles possessed higher BET area than that of pure TiO2. The photocatalytic activity and reusability of the catalysts under UV light (365nm) was investigated with neutral red as the model compound. The results showed that F (2.0%), Fe (4.0%) codoped TiO2 had the highest photocatalytic activity among all as-prepared samples. The kinetic study showed that this photocatalytic process coincided with the Langmuir-Hinshelwood (L-H) pseudo first order reaction model.

The Study of Three Capture Agents with High Efficiency for Hydrogen Sulfide

2013 ◽  
Vol 295-298 ◽  
pp. 590-593
Author(s):  
Shou Zhong Wang ◽  
Jian Zhao Qin ◽  
Yao Qing Chen ◽  
Tong Zhang ◽  
Zhi Feng Yang ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
High Efficiency ◽  
Ambient Conditions ◽  
N2 Adsorption ◽  
Removal Method ◽  
Grain Sizes ◽  
Rapid Removal ◽  
Adsorption Desorption ◽  
Desorption Method

A rapid removal method of hydrogen sulfide (H2S) gas is studied in the present paper at ambient conditions. These capture agents are powers of grain sizes and convenient for injection on H2S gas at the site of accident. The agents are characterized by SEM and N2 adsorption-desorption method, etc. The test on capturing H2S was experimented and the result indicated that the prepared agents can reduce the H2S concentration in the air to a harmless level rapidly.

Sign in / Sign up

Export Citation Format

Share Document