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.

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.

Study of a New Kind of Adsorbent for Removal of Nitric Oxides

2013 ◽  
Vol 295-298 ◽  
pp. 1429-1433
Author(s):  
Shou Zhong Wang ◽  
Ju Xu ◽  
Jin Hai Zhao ◽  
Tian Tian Guo ◽  
Tong Zhang ◽  
...  
Keyword(s):  
Surface Area ◽  
Removal Efficiency ◽  
High Efficiency ◽  
Nitric Oxides ◽  
Activated Alumina ◽  
N2 Adsorption ◽  
Carbide Slag ◽  
Adsorption Desorption ◽  
Desorption Method

A new kind of adsorbent is prepared in the present study, which is expected to capture NOx with high efficiency. NaOH, Ca(OH)2, carbide slag, diatomite, activated alumina are chosen as the major material with a small amount of surfactants and dispersants as the additive. Different recipes were characterized by SEM and N2 adsorption-desorption method. The result showed that the optimum adsorbent has the largest surface area of 95.67m2/g which is Ca(OH)2: NaOH: activated alumina=4:1:1. The test on removal of NOx is conducted. The result showed that the adsorbent is capable of removal efficiency exceeding 98% in 10minutes.

Fractal analysis of CO2 and N2 adsorption data to assess textural changes during char gasification

2019 ◽  
Vol 189 ◽  
pp. 15-27 ◽  
Author(s):  
Manuel María Mahamud ◽  
Juan María Menéndez ◽  
Alejandra Álvarez
Keyword(s):  
Fractal Analysis ◽  
N2 Adsorption ◽  
Char Gasification ◽  
Adsorption Data ◽  
Textural Changes

Facile Preparation of Nanoporous SnO2 for Application in Photodegradation of Methylene Blue

2011 ◽  
Vol 194-196 ◽  
pp. 385-388
Author(s):  
Hong Juan Wang ◽  
Feng Qiang Sun ◽  
Ming Zhong Ren ◽  
Qing Wei Guo
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
High Photocatalytic Activity ◽  
N2 Adsorption ◽  
Photochemical Method ◽  
Degussa P25 ◽  
Adsorption Desorption

Nanoporous SnO2with high photocatalytic activity has been successfully prepared by a photochemical method, using SnCl2aqueous solution as a precursor. The as-synthesized sample was characterized by XRD, N2 adsorption-desorption and UV-vis. The photocatalytic activity of the sample was evaluated by degrading methylene blue (MB) aqueous solution under the UV light source and was compared with that of the commercial titania (Degussa P25). The results showed that the produced SnO2can degrade MB solution quickly and has comparative photocatalytic performance with P25 for degrading MB. This facile method supplies an effective way to prepare SnO2photocatalyst.

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.

Effect of L-Arginine on the Carbon Microsphere Forming under Hydrothermal Carbonization

2019 ◽  
Vol 41 (1) ◽  
pp. 72-72
Author(s):  
Jilei Liang Jilei Liang ◽  
Mengmeng Wu Mengmeng Wu ◽  
Hongmei Cai Hongmei Cai ◽  
Hao Wang Hao Wang ◽  
Hua Huang Hua Huang ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Adsorption Capacity ◽  
Surface Property ◽  
Condensation Reaction ◽  
Hydrothermal Carbonization ◽  
Carbon Microspheres ◽  
N2 Adsorption ◽  
Sem Images ◽  
Ft Ir ◽  
Adsorption Desorption

Carbon microspheres (CMs) with a diameter of 5-10 μm have been synthesized by hydrothermal carbonization of starch and L-arginine. The surface property and structure of CMs were examined by FT-IR spectra, N2 adsorption-desorption isotherms and SEM images. These characterizations indicated that the L-arginine does not connect into the CMs but it promotes the starch hydrolysis and polymerization-condensation reaction of intermediate, which accelerates the formation of CMs and improves the yield in shorter time. The surface property of CMs determines adsorption capacity for acetic acid. By contrast, the porosity resulted from the carbonization at 500 and#176;C dominates the adsorption capacity for acetic acid.

scholarly journals Insights into matrix compressibility of coals by mercury intrusion porosimetry and N2 adsorption

2018 ◽  
Vol 200 ◽  
pp. 199-212 ◽  
Author(s):  
Yidong Cai ◽  
Qian Li ◽  
Dameng Liu ◽  
Yingfang Zhou ◽  
Dawei Lv
Keyword(s):  
Mercury Intrusion Porosimetry ◽  
N2 Adsorption ◽  
Mercury Intrusion

scholarly journals Synthesis of material MOFs (Fe-BTC) by mechanic-chemical method and its application in the reactive dye degradation

2021 ◽  
Vol 10 (1) ◽  
pp. 21-27
Author(s):  
Tuan Vu Anh ◽  
Hoa Vu Thi ◽  
Manh Nguyen Ba ◽  
Giang Le Ha ◽  
Trang Pham Thi Thu ◽  
...  
Keyword(s):  
Chemical Method ◽  
Dye Degradation ◽  
Reactive Dye ◽  
High Photocatalytic Activity ◽  
N2 Adsorption ◽  
X Ray ◽  
Sem Image ◽  
Grinding Method ◽  
High Initial Concentration ◽  
Adsorption Desorption

Nano Fe-BTC materials were successfully synthesized by mechanical chemical grinding method. Samples were characterized by X-ray difraction (XRD), Fourier-transform infrared spectroscopy (FTIR), N2 adsorption–desorption, Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS). SEM image of Fe-BTC-60 showed the particle size of 40–60 nm. Fe-BTC nanocomposites were tested for the photocatalytic degradation of reactive yellow 145 (RY-145) in aqueous solution. Fe-BTC composites exhibited high photocatalytic activity. Thus, at pH of 3 and high initial concentration of 100 mg RY-145/L, removal efficiency reached the value of 97.45% after 90 min of reaction.

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