Search results for: A. Celzard

Items from 1 to 20 out of 145 results

article

Permeability of fibrous carbon materials

B. Karakashov, J. Toutain, F. Achchaq, P. Legros, more

Journal of Materials Science > 2019 > 54 > 21 > 13537- 13556

The air permeability of a number of commercial fibrous carbon materials: soft non-woven felts, rigidised felts and rigid boards, based on either PAN- or Rayon-derived fibres presenting various diameters, graphitised or not, and consolidated by different methods, was measured and investigated. Consistent behaviours were found within families of closely related materials, but the diversity of porous...

article

Graphite-based composites for whey protein fouling and bacterial adhesion management

S. Zouaghi, M. Abdallah, C. André, N.E. Chihib, more

International Dairy Journal > 2018 > 86 > C > 69-75

Dairy industries are burdened by fouling phenomena that increase costs and environmental impacts of thermal processes. One remedial solution could be to replace stainless-steel equipment by other materials less prone to fouling. This work studied the fouling behaviour and hygienic features of two hydrophobic and non-polar commercial graphite-based composites (Graphilor® XC and XTH) that were exposed...

article

Destructive vs. non-destructive methods for the mechanical characterisation of tannin-based thermoset foams

C. Delgado-Sánchez, F.J. Santiago-Medina, V. Fierro, A. Pizzi, more

Polymer Testing > 2018 > 69 > C > 332-339

The mechanical properties of a broad range of thermoset foams based on tannin were investigated through destructive compression tests, either with or without rigid plates glued to the opposite faces of the samples, and through a rather new, non-destructive, quasi-static method. The main objective was to compare both techniques, as well as the effect of the presence of plates, and to discuss the relevance...

article

Optimisation of “green” tannin-furanic foams for thermal insulation by experimental design

C. Delgado-Sánchez, F. Santiago-Medina, V. Fierro, A. Pizzi, more

Materials & Design > 2018 > 139 > C > 7-15

In this paper, “green” tannin-furanic foams were prepared based on formulations free of formaldehyde and foaming agent, aiming at obtaining the best thermal insulators as possible with the highest mechanical resistance. Both of these properties are antagonistic, since low thermal conductivity requires high porosity whereas high mechanical properties require low porosity. Thus, experimental design...

article

Adsorption of Bisphenol A on KOH-activated tyre pyrolysis char

R. Acosta, D. Nabarlatz, A. Sánchez-Sánchez, J. Jagiello, more

Journal of Environmental Chemical Engineering > 2018 > 6 > 1 > 823-833

An activated carbon (AC) with a specific surface area of 700 m² g⁻¹ was prepared by KOH activation of tyre pyrolysis char (TPC) and tested to remove Bisphenol A (BPA) from aqueous solutions. BPA adsorption on this AC was evaluated by studying both the adsorption isotherms at three different temperatures and the decrease of BPA concentration with time, in order to determine the thermodynamic and the...

article

Electromagnetic properties of model vitreous carbon foams

M. Letellier, J. Macutkevic, P. Kuzhir, J. Banys, more

Carbon > 2017 > 122 > C > 217-227

This paper addresses the relationship between structural and electromagnetic (EM) properties of model vitreous carbon foams, i.e., presenting different porous structures in terms of bulk density, cell size and connectivity, while having the same composition and the same carbon texture. EM properties were investigated over a wide frequency range, from 20 Hz up to 250 THz. The bulk density is the main...

article

Acoustic properties of model cellular vitreous carbon foams

M. Letellier, S. Ghaffari Mosanenzadeh, H. Naguib, V. Fierro, more

Carbon > 2017 > 119 > C > 241-250

This paper deals with the relations between structural and acoustic properties of model vitreous carbon foams, i.e., presenting different porous structures in terms of bulk density, cell size and connectivity, while having the same composition and the same carbon texture. This is a major achievement with respect to former studies, in which foams had cell sizes directly correlated to their total porosity,...

article

Mechanical properties of model vitreous carbon foams

M. Letellier, C. Delgado-Sanchez, M. Khelifa, V. Fierro, more

Carbon > 2017 > 116 > C > 562-571

The present paper deals with the relations between structural and physical properties of model vitreous carbon foams, i.e., presenting different porous structures in terms of bulk density, cell size and connectivity, while having the same composition and the same carbon texture. Herein, their mechanical properties were investigated through a comparative analysis of samples either with or without rigid...

article

Rice straw-based activated carbons doped with SiC for enhanced hydrogen adsorption

S. Schaefer, G. Muñiz, M.T. Izquierdo, S. Mathieu, more

International Journal of Hydrogen Energy > 2017 > 42 > 16 > 11534- 11540

Activated carbons (ACs) based on rice straw (RS) were synthesised using potassium carbonate as activating agent at three different K₂CO₃/RS weight ratios. Morphological, chemical, structural as well as textural characterisations were carried out in order to establish relationships between the physicochemical properties of the materials and their hydrogen adsorption capacities. The ACs contained potassium...

article

Electrical Properties of Carbon Foam in the Microwave Range

P. P. Kuzhir, M. Letellier, D. S. Bychanok, O. G. Paddubskaya, more

Russian Physics Journal > 2017 > 59 > 10 > 1703-1709

The possibility is shown of a directional change of the dielectric permittivity of carbon foam promising for the use in shielding devices in the microwave frequency range. The frequency dependences of the transmission (T) and reflection (R) coefficients in the Ka-band are experimentally analyzed for the foams with the reticular structure. By the methods of 3D-modeling, the effect of the skeleton conductivity...

article

Stability analysis of tannin-based foams using multiple light-scattering measurements

C. Delgado-Sánchez, V. Fierro, S. Li, A. Pasc, more

European Polymer Journal > 2017 > 87 > C > 318-330

Liquid foams were prepared by whipping aqueous solutions based on natural polyphenols, surfactant and crosslinker. The destabilisation mechanisms of such thick, opaque and viscous liquid foams were investigated for the first time with a light-scattering detection method using an optical analyser. The technique allowed separating processes such as drainage, coalescence and coarsening, and sedimentation,...

article

Preparation and structural characterisation of model cellular vitreous carbon foams

M. Letellier, A. Szczurek, M.-C. Basso, A. Pizzi, more

Carbon > 2017 > 112 > C > 208-218

The aim the present work was to produce carbon foams with as different as possible porous structures but with similar composition and carbon texture for studying precisely the influence of different structural parameters such as density, cell size or interconnectivity on the physical properties of these foams. Over 60 different cellular carbon foams were obtained by pyrolysis of phenolic-furanic rigid...

article

Hydrophobisation of tannin-based foams by covalent grafting of silanes

C. Delgado-Sánchez, M. Letellier, V. Fierro, H. Chapuis, more

Industrial Crops and Products > 2016 > 92 > C > 116-126

Thermally insulating foams based on Mimosa bark extracts (Acacia Meansii) were hydrophobised with the aim of decreasing their sensitivity to moisture. Two different formulations leading to rigid foams presenting similar porosity were prepared, and were covalently grafted with three kinds of organosilanes. Non-treated and hydrophobised samples were all thoroughly characterised by FTIR spectroscopy,...

article

High added-value products from the hydrothermal carbonisation of olive stones

A.M. Borrero-López, V. Fierro, A. Jeder, A. Ouederni, more

Environmental Science and Pollution Research > 2017 > 24 > 11 > 9859-9869

Olive stones (OS) were submitted to hydrothermal carbonisation (HTC) in order to evaluate the possibility of producing high added-value products, mainly furfural (FU) and 5-hydroxymethylfurfural (5-HMF) on one hand and hydrochars and carbons on the other hand. Temperature (160–240 °C), residence time (1–8 h), initial pH (1–5.5) and liquid/solid ratio (4–48 w/w) were systematically varied in order...

article

Design of carbon foams for seasonal solar thermal energy storage

P. Jana, E. Palomo del Barrio, V. Fierro, G. Medjahdi, more

Carbon > 2016 > 109 > C > 771-787

Carbon foams specifically designed for seasonal solar thermal energy storage (SSTES) were prepared and characterised. For working efficiently as hosts for sugar alcohols used as phase-change materials and allowing the achievement of compact and affordable systems for SSTES, drastic conditions were required: thermal conductivity higher than 3 W m⁻¹ K⁻¹, porosity higher than 86% and cost not much higher...

article

Sucrose-based carbon foams with enhanced thermal conductivity

P. Jana, V. Fierro, A. Celzard

Industrial Crops and Products > 2016 > 89 > C > 498-506

Composite carbon foams based on sucrose char and graphite powder as matrix and filler, respectively, were prepared and characterised. The aim was to offer cellular monoliths with moderate thermal conductivity (3–10Wm⁻¹K⁻¹) for hosting phase-change materials designed for seasonal thermal storage. These materials were successfully obtained in this work, not only having the requested thermal properties...

article

Physisorption, chemisorption and spill-over contributions to hydrogen storage

S. Schaefer, V. Fierro, A. Szczurek, M.T. Izquierdo, more

International Journal of Hydrogen Energy > 2016 > 41 > 39 > 17442- 17452

Activated carbons (ACs), derived from resorcinol–formaldehyde xerogels and activated with KOH, were doped with nickel in supercritical carbon dioxide. Five Ni-doped ACs were thus prepared with nickel contents ranging from 6.6 to 31.9 wt.% and Ni nanoparticles diameters from 19 to 37 nm. Nitrogen and carbon dioxide adsorption allowed a complete textural characterisation; surface area decreased from...

article

Assessment of hydrogen storage in activated carbons produced from hydrothermally treated organic materials

S. Schaefer, V. Fierro, M.T. Izquierdo, A. Celzard

International Journal of Hydrogen Energy > 2016 > 41 > 28 > 12146- 12156

12 activated carbons (ACs) were prepared by KOH activation using hydrochars as precursors. These hydrochars were prepared by hydrothermal carbonisation (HTC) of sucrose solutions at concentrations ranging from 0.2 to 1.6 mol L⁻¹. The KOH to hydrochar weight ratio (W) was varied from 1 to 5, and the activation temperature was set to 1023 K. ACs texture was assessed by nitrogen and carbon dioxide adsorption...

article

Experimental and numerical analysis of CFRP-strengthened finger-jointed timber beams

M. Khelifa, A. Celzard, M. Oudjene, J. Ruelle

International Journal of Adhesion and Adhesives > 2016 > 68 > C > 283-297

Experimental and finite element (FE) studies of bending behaviour of finger-jointed timber (Spruce) beams reinforced with CFRP material were performed. Four-point bending tests with distinct reinforcement configurations were proposed in order to determine stiffness, ductility and strength values of strengthened finger-jointed timber beams. The experimental results obtained under flexure showed that...

article

Structure and properties of poly(furfuryl alcohol)-tannin polyHIPEs

A. Szczurek, V. Fierro, M. Thébault, A. Pizzi, more

European Polymer Journal > 2016 > 78 > C > 195-212

The synthesis and the properties of the first polymerised High Internal Phase Emulsions (polyHIPEs) derived from co-reacted tannin and furfuryl alcohol resin, are reported in this paper. Such highly porous thermoset polymers were obtained by emulsion-templating in the form of strong monoliths, using 70vol% of cyclohexane as the internal phase. The volatility of the latter made the preparation process...

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Keywords

ACTIVATED CARBON (24)
TANNIN (19)
ADSORPTION (16)
HYDROGEN STORAGE (10)
THERMAL CONDUCTIVITY (10)
ACTIVATED CARBONS (8)
POROSITY (7)
POROUS STRUCTURE (6)
CARBON (5)
CARBON FOAMS (5)
CONDUCTIVITY (5)
FOAM (5)
LIGNIN (5)
MECHANICAL PROPERTIES (5)
PERCOLATION (5)
GAS STORAGE (4)
GRAPHITE (4)
RICE STRAW (4)
RIGID FOAM (4)
RIGID FOAMS (4)
SURFACE AREA (4)
ACTIVATION (3)
DIELECTRICS (3)
ELECTRICAL CONDUCTIVITY (3)
FOAMS (3)
H3PO4 (3)
HYDROTHERMAL CARBONISATION (3)
KOH ACTIVATION (3)
PERMEABILITY (3)
PERMITTIVITY (3)
PHYSICAL PROPERTIES (3)
TANNIN FOAMS (3)
A. ACTIVATED CARBON (2)
A. EXFOLIATED GRAPHITE (2)
AEROGELS (2)
ALBUMIN FOAMS (2)
B. ACTIVATION (2)
BENZENE (2)
BIOMASS (2)
C. ADSORPTION (2)
C. MODELING (2)
CARBON DIOXIDE (2)
CARBONISATION (2)
CARBONIZATION (2)
CELLULOSE (2)
CFRP (2)
CHEMICAL ACTIVATION (2)
COMPOSITE MATERIALS (2)
COMPRESSION (2)
COMPRESSIVE STRENGTH (2)
CRITICAL EXPONENTS (2)
D. DENSITY (2)
D. GAS STORAGE (2)
DIELECTRIC PERMITTIVITY (2)
DIFFUSION (2)
ELASTIC MODULUS (2)
ELECTROMAGNETIC INTERFERENCE (2)
ELECTROMAGNETICS (2)
EXPANDED GRAPHITE (2)
FEM (2)
FIBRES (2)
FLOCCULATION (2)
FORMATION FACTOR (2)
FORMULATION (2)
GEL POINT (2)
HYDROGEN PRODUCTION (2)
INSULATION (2)
IRON (2)
MALDI-TOF (2)
METHANE DECOMPOSITION (2)
MICROPOROSITY (2)
MICROWAVE PHOTONICS (2)
NITROGEN DOPING (2)
PAPERMAKING (2)
PINE TANNIN (2)
PINUS PINASTER (2)
PORE STRUCTURE (2)
PROTEIN FOAMS (2)
REARRANGEMENT (2)
RESINS (2)
STRUCTURE CONSERVATION (2)
SUPERCAPACITOR (2)
SUPERCRITICAL DRYING (2)
SURFACE PROPERTIES (2)
SURFACTANT (2)
TANNINS (2)
TANNINS FOAMS (2)
WETTING (2)
X-RAY DIFFRACTION (2)
XEROGELS (2)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 72.60.+G (2)
1,3 BUTADIENE (1)
3D-MODELING (1)
A. ANTHRACITE (1)
A. CARBON COMPOSITES (1)
ABAQUS (1)
ABSORPTION (1)
ACOUSTIC ABSORPTION (1)
ACOUSTIC INSULATION (1)
ADHESIVE (1)
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Springer (12)
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ACS (2)
Wiley (1)

Journal

Carbon (30)
Industrial Crops & Products (15)
International Journal of Hydrogen Energy (10)
Microporous and Mesoporous Materials (8)
Industrial Crops and Products (5)
Journal of Hazardous Materials (5)
Materials Chemistry and Physics (5)
Applied Catalysis A, General (4)
Biomass and Bioenergy (4)
Journal of Materials Science (4)
Polymer Degradation and Stability (4)
Bioresource Technology (3)
European Polymer Journal (3)
Sensors & Actuators: B. Chemical (3)
Cellulose (2)
Energy & Fuels (2)
Fuel (2)
Fuel Processing Technology (2)
Materials & Design (2)
Materials and Design (2)
Materials and Structures (2)
Physica A: Statistical Mechanics and its Applications (2)
Ceramics International (1)
Chemosphere (1)
Composite Structures (1)
Engineering Structures (1)
Environmental Science and Pollution Research (1)
IEEE Transactions on Electromagnetic Compatibility (1)
International Dairy Journal (1)
International Journal of Adhesion and Adhesives (1)
Journal of Environmental Chemical Engineering (1)
Journal of Physics and Chemistry of Solids (1)
Journal of Polymer Research (1)
Journal of Power Sources (1)
Macromolecular Symposia (1)
Materials Science & Engineering A (1)
Microsystem Technologies (1)
Physics Procedia (1)
Polymer Testing (1)
Procedia Chemistry (1)
Progress in Materials Science (1)
Russian Physics Journal (1)
Surface Science (1)
Thermochimica Acta (1)
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INFONA - science communication portal

Search results for: A. Celzard

Permeability of fibrous carbon materials

Graphite-based composites for whey protein fouling and bacterial adhesion management

Destructive vs. non-destructive methods for the mechanical characterisation of tannin-based thermoset foams

Optimisation of “green” tannin-furanic foams for thermal insulation by experimental design

Adsorption of Bisphenol A on KOH-activated tyre pyrolysis char

Electromagnetic properties of model vitreous carbon foams

Acoustic properties of model cellular vitreous carbon foams

Mechanical properties of model vitreous carbon foams

Rice straw-based activated carbons doped with SiC for enhanced hydrogen adsorption

Electrical Properties of Carbon Foam in the Microwave Range

Stability analysis of tannin-based foams using multiple light-scattering measurements

Preparation and structural characterisation of model cellular vitreous carbon foams

Hydrophobisation of tannin-based foams by covalent grafting of silanes

High added-value products from the hydrothermal carbonisation of olive stones

Design of carbon foams for seasonal solar thermal energy storage

Sucrose-based carbon foams with enhanced thermal conductivity

Physisorption, chemisorption and spill-over contributions to hydrogen storage

Assessment of hydrogen storage in activated carbons produced from hydrothermally treated organic materials

Experimental and numerical analysis of CFRP-strengthened finger-jointed timber beams

Structure and properties of poly(furfuryl alcohol)-tannin polyHIPEs

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