Capillary Condensation of Light Hydrocarbons in MCM-41 - Type Mesoporous Materials

1996 ◽  
Vol 454 ◽  
Author(s):  
M. A. Ioneva ◽  
R. G. Mallinson ◽  
J. H. Harwell
Keyword(s):  
Experimental Data ◽  
Mesoporous Materials ◽  
Capillary Condensation ◽  
Light Hydrocarbon ◽  
Unique Characteristic ◽  
Fluid Density ◽  
Light Hydrocarbons ◽  
Templated Materials ◽  
Mcm 41

ABSTRACTThe MCM-41 family of surfactant templated materials were used as model mesoporous sorbents for storage of light hydrocarbon vapors, by utilizing the phenomenon of capillary condensation. The experimental data show that, because of the fine tunability of MCM-41 type materials (mesopore diameter was controlled between 20 and 40 Å), the onset of capillary condensation can be controlled, and from here the point of achieving liquid-like fluid density in the pores. Such a unique characteristic makes the MCM-41 family of materials a potential media for sorptive fractionation.

scholarly journals Measuring the specific surface area of mesoporous silica using x-ray scattering

2014 ◽  
Vol 70 (a1) ◽  
pp. C599-C599
Author(s):  
Julien Cambedouzou ◽  
Olivier Diat
Keyword(s):  
Experimental Data ◽  
Specific Surface ◽  
Surface Area ◽  
Mesoporous Materials ◽  
Specific Surface Area ◽  
Small Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Mcm 41 ◽  
Ray Scattering

The development of porous silica or carbon material with high specific surface area raises a high interest in the field of materials science given their potential interest in a wide range of applications including catalysis, water treatment or drug delivery. Among these mesoporous structures, those consisting of one-dimensional pores aligned along a compact hexagonal packing are of prime importance and can be referred to as "hexagonal mesoporous materials" (HMPM). The most famous silica structures of this kind are MCM-41 and SBA-15. The same symmetry can be found in carbon mesoporous materials, for example in FDU-15 structures. The precise characterization of HMPM is necessary for most of the applications envisioned for these materials (pore size, pore density, specific surface and sometimes thickness of the functionalization layer). Small angle X-ray scattering techniques offer the opportunity to determine the mean structural parameters of HMPM. Although different approaches can be found in the literature in order to numerically reproduce the experimental data obtained on HMPM or hexagonal liquid crystals, when the sample is a powder, fitting the experimental data in absolute scale with numerical models becomes necessary. However, with a large scattering contribution of grain at low q vector as well as short range correlation contribution at large q, the analysis is not so simple. In this paper, we propose a comprehensive study [1] devoted to the quantitative interpretation of small-angle scattering patterns of HMPM in terms of structure and specific surface estimation based on the formalism proposed by Spalla et al. [2]. In the case of two real samples, namely a SBA-15 and a MCM-41 powder, the specific surface area of the mesopores is estimated and is discussed in the light of gas adsorption measurements.

Study of n-hexane adsorption in MCM-41 mesoporous materials: a scaling effect approach of capillary condensation processes

2004 ◽  
Vol 28 (7) ◽  
pp. 874 ◽  
Author(s):  
Philippe Trens ◽  
Nathalie Tanchoux ◽  
Daniel Maldonado ◽  
Anne Galarneau ◽  
Francesco Di Renzo ◽  
...  
Keyword(s):  
Mesoporous Materials ◽  
Capillary Condensation ◽  
Scaling Effect ◽  
Mcm 41

scholarly journals Adsorption of Benzene and Ethanol on Activated Carbon, MCM-41 and Zeolite Y

1998 ◽  
Vol 16 (6) ◽  
pp. 439-452 ◽  
Author(s):  
C. Nguyen ◽  
D.D. Do
Keyword(s):  
Experimental Data ◽  
Activated Carbon ◽  
Active Carbon ◽  
Capillary Condensation ◽  
Zeolite Y ◽  
Nitrogen Adsorption ◽  
Relative Pressure ◽  
Wide Range ◽  
Mcm 41

The adsorption of benzene and ethanol at 0, 15 and 30°C on to a number of adsorbents were studied to investigate their performance in the removal of VOCs. The isotherms were measured over a wide range of relative pressure in order to study the contribution of the micropore adsorption and the capillary condensation in mesopores. A model describing the adsorption of subcritical vapours was tested against the isotherm data. It was found that results obtained from the isotherm fitting of benzene and ethanol experimental data were consistent with each other and also with the results of nitrogen adsorption at 77 K. Among the adsorbents studied, Ajax active carbon was found to be the most practical adsorbent for the removal of VOCs.

Heteropolyacids supported on micro/mesoporous materials PMoW@HKUST-1@ZSM-5-MCM-41: Effective catalyst for oxidative desulfurization with oxygen

2021 ◽  
Vol 504 ◽  
pp. 111419
Author(s):  
Jiarong Li ◽  
Zhe Liu ◽  
Guangfa Hu ◽  
Ruimin Gao ◽  
Ronglan Zhang ◽  
...  
Keyword(s):  
Mesoporous Materials ◽  
Oxidative Desulfurization ◽  
Effective Catalyst ◽  
Mcm 41

Photoinduced charge separation in microporous and mesoporous materials

2011 ◽  
Vol 89 (3) ◽  
pp. 257-265 ◽  
Author(s):  
Ranjit T. Koodali
Keyword(s):  
Mesoporous Materials ◽  
Charge Separation ◽  
Organic Molecules ◽  
Microporous Materials ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge ◽  
Mcm 41

A review of photoinduced charge separation of organic molecules in microporous and mesoporous materials is presented. In particular, the photoionization of N-alkylphenothiazine (PCn), N,N,N′,N′-tetramethylbenzidine (TMB), and porphyrin in microporous materials, such as zeolites, aluminophosphates (AlPOs), silicoaluminophosphates (SAPOs), and mesoporous materials, such as MCM-41, MCM-48, and SBA-15, is discussed.

Explanation of the Influence of Inflow Air Content on the Lift of Cavitating Hydrofoils

2018 ◽  
Vol 140 (8) ◽  
Author(s):  
Eduard Amromin
Keyword(s):  
Experimental Data ◽  
Theoretical Study ◽  
Lift Coefficient ◽  
Cavity Surface ◽  
Air Bubbles ◽  
Incoming Flow ◽  
Fluid Density ◽  
Air Content ◽  
Theoretical Results ◽  
Good Agreement

According to several known experiments, an increase of the incoming flow air content can increase the hydrofoil lift coefficient. The presented theoretical study shows that such increase is associated with the decrease of the fluid density at the cavity surface. This decrease is caused by entrainment of air bubbles to the cavity from the surrounding flow. The theoretical results based on such explanation are in a good agreement with the earlier published experimental data for NACA0015.

scholarly journals Adsorption of yellow dye on calcined or uncalcined Al-MCM-41 mesoporous materials

2017 ◽  
Vol 10 ◽  
pp. S2160-S2169 ◽  
Author(s):  
Bouhadjar Boukoussa ◽  
Rachida Hamacha ◽  
Amine Morsli ◽  
Abdelkader Bengueddach
Keyword(s):  
Mesoporous Materials ◽  
Mcm 41

Dissipative Forced Intrusion Of Water In Hydrophobic Porous Silica: A New Field of Applications For MCM-41 Type Materials

2002 ◽  
Vol 726 ◽  
Author(s):  
Benoit Lefevre ◽  
Pierre F. Gobin ◽  
Thierry Martin ◽  
Anne Galarneau ◽  
Daniel Brunel
Keyword(s):  
Energy Dissipation ◽  
Mesoporous Materials ◽  
Porous Silica ◽  
Mechanical Field ◽  
New Type ◽  
Highly Hydrophobic ◽  
Materials Behavior ◽  
Mcm 41

AbstractRecently microporous and mesoporous materials were found to be particularly suitable for a new type of applications in the mechanical field. This paper reports experimental features about the dissipative forced intrusion of water in highly hydrophobic mesoporous materials: this phenomenon can be used to develop a new type of dampers and/or actuators. Silica-based materials behavior was investigated. Among them, MCM-41 exhibit original and interesting properties towards the potential developments of dampers and appear to be of great interest for the comprehension of energy dissipation mechanisms.

Sign in / Sign up

Export Citation Format

Share Document