Characterization of Microporous Catalysts by N2 Adsorption : Empirical Correlations between Parameters Assessed by Different Methods.

1988 ◽  
pp. 119-126 ◽  
Author(s):  
F. Raatz ◽  
H. Ajot
Keyword(s):  
Empirical Correlations ◽  
N2 Adsorption

Adsorption Characteristics of Modified MiL-101(Cr) for Gas (Mainly CH4) Storage Applications

2015 ◽  
Author(s):  
How Wei Benjamin Teo ◽  
Anutosh Chakraborty ◽  
Kim Tiow Ooi
Keyword(s):  
Natural Gas ◽  
X Ray Diffraction ◽  
Uptake Capacity ◽  
N2 Adsorption ◽  
Thermo Gravimetric ◽  
X Ray ◽  
Thermo Gravimetric Analyzer ◽  
Metal Organic ◽  
Ch4 Uptake

As promising material for gas storage applications, MIL-101(Cr) can further be modified by doping with alkali metal (Li+, Na+, K+) ions. However, the doping concentration should be optimized below 10% to improve the methane adsorption. This article presents (i) the synthesis of MIL-101 (Cr) Metal Organic Frameworks, (ii) the characterization of the proposed doped adsorbent materials by X-ray Diffraction, Scanning Electron Microscopy, N2 Adsorption, Thermo-Gravimetric Analyzer, and (iii) the measurements of methane uptakes for the temperatures ranging from 125 K to 303 K and pressures up to 10 bar. It is found that the Na+ doped MIL-101(Cr) exhibits CH4 uptake capacity of (i) 295 cm3/cm3 at 10 bar and 160 K and (ii) 95 cm3/cm3 at 10 bar at 298 K. This information is important to design adsorbed natural gas (ANG) storage tank under ANG-LNG (liquefied natural gas) coupling conditions.

scholarly journals Hydrogenation of 1-octene by Co-Mo/MCM-41 catalysts

2012 ◽  
Vol 23 (2) ◽  
pp. 133-136
Author(s):  
Chol Ryong Jang ◽  
Vasile Matei ◽  
Anca Borcea ◽  
Viorel Voicu ◽  
Raluca Proscanu ◽  
...  
Keyword(s):  
Detection Limit ◽  
Metal Species ◽  
Synthesis And Characterization ◽  
N2 Adsorption ◽  
Hydrogenation Activity ◽  
Bet Specific Surface Area ◽  
Xrd Patterns ◽  
Adsorption Desorption ◽  
Mcm 41

AbstractThe synthesis and characterization of MCM-41 supported Co-Mo catalysts and catalytic hydrogenation of 1-octene to n-octane were discussed. BET specific surface area of MCM-41, calculated from N2 adsorption/desorption isotherm, was 1690 m2/g. The XRD patterns of the Co-Mo/MCM-41 catalysts show that metal species are finely dispersed and the size of CoO and MoO3 particles is below the detection limit by XRD. The 1-octene hydrogenation activity of the catalysts decreased with increasing the Co content up to 9 wt.% for the Co-promoted Co-Mo/MCM-41 catalysts with a MoO3 content of 12 wt.%. All the catalysts show increased hydrogenation activity with increasing reaction temperature in the temperature range from 200 to 350°C.

Characterization of single-wall carbon nanotubes by N2 adsorption

Carbon ◽  
2004 ◽  
Vol 42 (12-13) ◽  
pp. 2375-2383 ◽  
Author(s):  
Fanxing Li ◽  
Yao Wang ◽  
Dezheng Wang ◽  
Fei Wei
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
N2 Adsorption ◽  
Single Wall Carbon

Unsteady and Pseudo-steady State Characterization of Matrix and Fracture Systems for Multiple Size Blocks with the Use of Empirical Correlations

2010 ◽  
Author(s):  
Gabriela Morales German ◽  
Edgar Rangel-German ◽  
Fernando Samaniego-Verduzco ◽  
Heber Cinco Ley
Keyword(s):  
Steady State ◽  
Empirical Correlations ◽  
Fracture Systems

Preparation and Characterization of MCM-22 Zeolite by Varying-Temperature Hydrothermal Synthesis

2011 ◽  
Vol 197-198 ◽  
pp. 1587-1590
Author(s):  
Yue Cheng ◽  
Xiao Yuan Su ◽  
Mang Lu
Keyword(s):  
Hydrothermal Method ◽  
Amorphous Material ◽  
Sem Analysis ◽  
Bet Surface Area ◽  
N2 Adsorption ◽  
Tem Analysis ◽  
Synthesis Time ◽  
Xrd Pattern ◽  
Adsorption Desorption

MCM-22 zeolite of high crystallinity was synthesized with varying-temperature hydrothermal method. Zeolite was characterized by means of XRD, SEM, TEM and TG-DTA. XRD pattern showed that the sample was MCM-22 zeolite. SEM analysis indicated that the MCM-22 sample is in the form of thin platelet-like crystals, and no amorphous material. TEM analysis exhibited regular shaped aggregate assembled by the independent growth of many small flaky crystals. N2-adsorption/desorption analysis showed that the pore size and BET surface area of MCM-22 were 3.5 nm and 387.8 m2/g, respectively. By means of the varying-temperature hydrothermal method, synthesis time can be effectively reduced, and energy consumption also decreases.

Geotechnical properties of two deep-sea marine soils from the Labrador Sea

1987 ◽  
Vol 24 (4) ◽  
pp. 536-548 ◽  
Author(s):  
Pierre Morin ◽  
C. Roy Dawe
Keyword(s):  
Deep Sea ◽  
Laboratory Testing ◽  
Soil Structure ◽  
Geotechnical Properties ◽  
Labrador Sea ◽  
Geological Data ◽  
Empirical Correlations ◽  
Surficial Sediments ◽  
X Ray

Cores from two deep-sea sites from the Labrador Sea have been extensively studied using various analyses. X-ray techniques provided a continuous profile of bulk densities and an accurate description of the bedding. The soil structure was analyzed by scanning electron microscopy. Detailed identification, laboratory shear strength, and compressibility tests have been used to determine the geotechnical properties of the soils, both in their intact and remolded states. Geological data and fabric observations are compared with geotechnical properties in order to explain the observed overconsolidation of the surficial sediments. Characterization of the seabed materials is further improved by using existing empirical correlations with soils of onshore and offshore origin. Key words: marine sediments, deep-sea investigation, overconsolidation, laboratory testing, offshore.

scholarly journals Indonesian Modified Clay for Dye Waste Treatment

2020 ◽  
Vol 3 (1) ◽  
pp. 122
Author(s):  
Iwan Sumarlan ◽  
Is Fatimah ◽  
Karna Wijaya
Keyword(s):  
Methyl Orange ◽  
Diffuse Reflectance ◽  
Waste Treatment ◽  
Impregnation Method ◽  
X Ray Diffraction ◽  
N2 Adsorption ◽  
X Ray ◽  
Uv Illumination ◽  
Uv Visible

Synthesis and Characterization of TiO2 Coated on Clay Pillared Alumina (PILC) for Methyl Orange Photodegradation Under UV Illumination. The synthesis included both pillarization the clay with alumina and TiO2 coated on PILC using impregnation method. Some characterizations also were employed to this research such as X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), N2 Adsorption Isotherm and UV-Visible Diffuse Reflectance (DR UV). The photocatalyst was then used to decompose waste dye, methyl orange (MO). Among three photocatalysts that were successfully synthesized, PILC Ti 1.0% had the highest activity to decompose the waste dye.

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