Albi-Carmaux School of Engineering

www.mines-albi.fr
Albi, France
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Patent
Albi-Carmaux School of Engineering | Date: 2017-04-19

The present invention explores the physical-chemical properties of certain phosphate-based materials for the purpose of producing thermal-energy storage systems. A product family including orthophosphates, pyrophosphates, polyphosphates, apatites and phosphated minerals, is described based on orthophosphates, pyrophosphates, apatites and phosphate minerals, alone or in combination with other products, in particular silicas or silicates, which are useful for storing energy due to the thermal stability up to high temperatures, the low thermal dilation coefficient and the thermal conductivity thereof. Said materials have a broad range of melting temperatures, which makes it possible to store the sensitive energy as well as the melting enthalpy over a broad temperature range with no risk of breaking down.


Carlier L.,Albi-Carmaux School of Engineering | Baron M.,Albi-Carmaux School of Engineering | Chamayou A.,Albi-Carmaux School of Engineering | Couarraze G.,University Paris - Sud
Tetrahedron Letters | Year: 2011

Many synthetic methods exist for dibenzoquinoxalines but only a few for dibenzophenazines and their aza derivatives and even less are 'green'. Some dibenzophenazines and dibenzopyridoquinoxaline have been efficiently obtained with good to excellent yield by a very simple method which does not require use of solvent or catalyst. Solid phase synthesis using co-grinding presents thus many advantages in developing greener synthetic organic pathways. © 2011 Elsevier Ltd. All rights reserved.


Grant
Agency: European Commission | Branch: FP7 | Program: MC-IRSES | Phase: FP7-PEOPLE-2012-IRSES | Award Amount: 302.40K | Year: 2013

Development of advanced thermochemical processes (namely advanced combustion, gasification and pyrolysis) for the energy valorisation of biomass and assessment of the environmental impacts associated with alternative strategies in the use of this natural resource.


Grant
Agency: European Commission | Branch: FP7 | Program: CP | Phase: ICT-2009.1.2 | Award Amount: 4.01M | Year: 2010

The goal of PLAY is to develop and validate an elastic and reliable federated SOA architecture for dynamic and complex, event-driven interaction in large highly distributed and heterogeneous service systems. Such architecture will enable exchange of contextual information between heterogeneous services, providing the possibilities to optimize/personalize the execution of them, resulting in the so called situational-driven adaptivity.\nThe main outcome will be a FOT (federated open trusted) Platform for event-driven interaction between services, that scales at the Internet level based on the proposed architecture and that addresses Quality of Service (QoS) requirements. The platform consists of:\n- Federated middleware layer: a peer-to-peer overlay network combined with a publish/subscribe mechanism, that has the task to collect events coming from the heterogeneous and distributed services,\n- Distributed complex event processor: an elastic, distributed computing cloud based engine for complex processing/combining of events coming from different services in order to detect interesting situations a service should react on\n- Situational-aware business adapter: a recommender engine for proposing adaptation and changes in running business processes and services in a non-predefined (ad-hoc) way, by ensuring the consistency of the whole instance\nThe system will be tested in two use cases: crisis management and telecom industry, showing the advantages of such an architecture for Future Internet. Indeed, PLAY aims to revolutionize the Future Internet by making it situational-aware, which leads to the event-aware services that are able to proactively adapt themselves to the changes in the environment.


Chitu T.M.,Albi-Carmaux School of Engineering | Oulahna D.,Albi-Carmaux School of Engineering | Hemati M.,ENSIACET
Powder Technology | Year: 2011

The effect of the main means of agitation in a high shear mixer has been investigated in this study. Granulation runs have been performed on a fine cohesive microcrystalline cellulose powder (Avicel 105, d 50=20μm) often used as a pharmaceutical excipient in tablet formulations in two bowls of a Mi-Pro® laboratory high shear mixer with a capacity of 0.9 and 1.9L, respectively. Torque curves recorded during granulation are found to allow good control of the process while increasing impeller speed is found to generally reduce granule size and the onset of breakage seems to occur for similar values of impeller tip speed. As a general rule, the chopper allows for better binder distribution in the Mi-Pro® and is found to be necessary for successful granulation at low to moderate impeller speeds. For high impeller speeds in excess of 4.4m/s with or without a chopper, similar granule sizes and growth mechanisms are observed. Granule roundness was found to increase with impeller speed up to a certain speed after which granule roundness has been found to decrease with increasing impeller speed most probably because of increased breakage of the granules. Dry granule strength has been found to increase with increasing impeller speed, presenting only a slight decrease at the highest impeller speed studied. © 2010 Elsevier B.V.


Chitu T.M.,Albi-Carmaux School of Engineering | Oulahna D.,Albi-Carmaux School of Engineering | Hemati M.,ENSIACET
Powder Technology | Year: 2011

This study aims at better understanding the wet granulation process of a binary mixture composed of microcrystalline cellulose (water insoluble) and lactose (water soluble). It investigates the effect of formulation (proportion of the different components in the mixture) on the granule growth kinetics, the evolution of granule morphology during granulation, the wet mass consistency and dry granule strength of the end product. Additionally the influence of mixer design has been studied by up scaling the process from the 1.9. L Mi-pro high shear mixer used as the reference scale to a 6. L Diosna P1-6 high shear mixer. The scale-up rules investigated were constant impeller tip speed and constant Froude number. Our results allowed us to draw the following conclusions: -The increase in MCC content is found to increase the optimum binder requirement for granulation, wet mass consistency and dry granule strength. -Granule growth takes place in three distinct stages: wetting, nucleation and growth. These stages can be identified with the help of the recorded torque values during the granulation process or by the evolution of granule size and granule morphology. -The characterization of the starting materials by moisture sorption isotherms brings more insight to the role of each component during the granulation process. -The increase of the granulation scale has little influence on the observed growth mechanism. However bi-modality of the granule size distribution is increased, wet mass consistency and dry granule strength are decreased with increasing scale of operation. © 2010 Elsevier B.V.


Lefebvre G.,Albi-Carmaux School of Engineering | Galet L.,Albi-Carmaux School of Engineering | Chamayou A.,Albi-Carmaux School of Engineering
AIChE Journal | Year: 2011

Even though dispersion operations have been the object of several investigations, the importance of the different parameters and especially the physicochemical and surface properties are rarely treated. Dry particle coating can be used to create new generation materials. In such processes, host particles are mechanically coated with guest particles, without using solvents and subsequent drying, to create new functionalities or to improve initial characteristics. This study examines the surface properties of talc particles modified by dry coating with hydrophobic silica particles. Two parameters have been studied: the concentration of silica particles and the dry coating processing time. Both parameters allow modifications of the work of adhesion of talc particles with water, which is a characteristic of wettability. This change of wettability can consequently influence the dispersion rate of talc in water. © 2010 American Institute of Chemical Engineers AIChE J, 2011 Copyright © 2010 American Institute of Chemical Engineers (AIChE).


Lefebvre G.,Albi-Carmaux School of Engineering | Galet L.,Albi-Carmaux School of Engineering | Chamayou A.,Albi-Carmaux School of Engineering
Powder Technology | Year: 2011

Even though dispersion operations have been the object of several investigations, the importance of the various parameters and especially the physicochemical and surface properties are rarely treated. Dry particle coating can be used to create new-generation materials by combining different powders exhibiting different physical and/or chemical properties. In such processes relatively large particles (host particles) are mechanically coated with fine particles (guest particles), without using solvents and subsequent drying, to create new functionalities or to improve initial characteristics. The purpose of this study is to modify the surface of Talc particles by dry coating with different concentrations of hydrophobic Silica (Aerosil R972®), to examine the effect of the coating on the wettability of the coated Talc particles and to study the effects on the dispersibility of these same composite particles. Dry coating is found to modify the surface of Talc particles and to control their wettability and dispersibility in aqueous solutions. © 2010 Elsevier B.V.


Chhiti Y.,Albi-Carmaux School of Engineering | Salvador S.,Albi-Carmaux School of Engineering | Commandre J.-M.,CIRAD - Agricultural Research for Development | Broust F.,CIRAD - Agricultural Research for Development
Fuel | Year: 2012

In this study, pyrolysis process of wood bio-oil was studied. The effects of temperature in the range 550-1000 °C, heating rate in the range 2-2000 °C s -1 and ash content of the bio-oil on char, tar and gas yields were investigated. The main gas species generated are quantified by Micro-GC: H 2, CO, CO 2, CH 4 and trace amounts of C 2H 4 and C 2H 6. A temperature increase from 550 to 1000 °C enhanced greatly the gas yield, whilst solid and liquid yields decreased significantly. The heating rate was varied in a range covering rapid pyrolysis using the Horizontal Tubular Reactor (HTR) to flash pyrolysis using an Entrained Flow Reactor (EFR). A decrease of char yield from 11 wt.% down to 4 wt.% was observed when heating rate is changed from 2 to 100 °C s -1. In EFR a flash heating rate of 2000 °C s -1 led to a char yield as low as 1 wt.%. Bio-oil with a natural ash contents of 0.05 wt.% and bio-oil added with 3 wt.% of ash were finally pyrolyzed. Ash seems to favor re-polymerization reactions that lead to an increase in char yield. A decrease in the amount of gas is observed when ash is added while an increase was a priori expected. © 2012 Elsevier Ltd. All rights reserved.


Le Duigou A.,CEA Saclay Nuclear Research Center | Miguet M.,Albi-Carmaux School of Engineering | Amalric Y.,CEA Saclay Nuclear Research Center
International Journal of Hydrogen Energy | Year: 2011

This study analyses the current industrial hydrogen markets in France on both a European and international scale, while endeavouring to assess future prospects by 2030. Hydrogen is produced either on purpose or unintentionally as a co-product. Intentional production of hydrogen, generally from natural gas, is classified as captive or merchant hydrogen. France produces about 920,000 metric tons of hydrogen annually. The producer and consumer industries are, in decreasing order of importance are: oil for refinery and petrochemicals, ammonia, iron & steel (co-production), chemicals, and chlorine (co-production). The intentional production of hydrogen from natural gas amounts to less than that co-produced: 40% compared with 60%. The amount of burned hydrogen is about 25% of the total. Production-related carbon dioxide emissions range between 1% and 2% of the total emissions in France. There is an increasing trend in the industrial hydrogen production, essentially due to the oil industry whereas a decline in production is expected in the ammonia industry. The annual production around 2030 should therefore be greater than 1 million metric tons (MMT) per year. If the iron & steel industry were to use hydrogen in every possible situation, it would double the total quantity of hydrogen produced and consumed in France. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

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