Publications by Thierry Meyer | EPFL Graph Search

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In the context of process and product design, predictive models are increasingly employed. Decomposition properties of chemicals may be experimentally determined through calorimetric measurements, and a few molecular structure-based models- which correlate ...

Ultrasound propagates through an elastic medium at a rate or speed named the ultrasound propagation velocity (UPV). This velocity is detd. by the rate at which the wave energy is transmitted, inversely related to the square root of the d. and compressibility of the medium. This technique is based on the increase of UPV with rising elasticity of the medium due to polymn. As monomer is transformed to polymer, both the d. and adiabatic compressibility change, making the UPV closely related to monomer conversio

A review in 4 sections comprising synthetic methods and prodn. processes of plastics (section I), apparatuses for prodn., processing, and making of plastics (section II), manufg. processes for the most important plastics (section III), and processing of th ...

Solar energy is considered clean energy, and its use is predicted to increase in the near future. Most installed units today are crystalline solar cells, but the field is in constant development, and when the first dye sensitized solar cell was published b ...

Objectives: Many nanomaterials (materials with structures smaller than 100 nm) have chemical, physical and bioactive characteristics of interest for novel applications. Considerable research efforts have been launched in this field. This study aimed to stu ...

Despite numerous discussions, workshops, reviews and reports about responsible development of nanotechnology, information describing health and environmental risk of engineered nanoparticles or nanomaterials is severely lacking and thus insufficient for completing rigorous risk assessment on their use. However, since preliminary scientific evaluations indicate that there are reasonable suspicions that activities involving nanomaterials might have damaging effects on human health; the precautionary principle

Inline conversion measurements in chem. reactions are in general and esp. in polymn. reactions necessary for process monitoring and control. For polymn. monitoring, the sound propagation (UPV) can be related to the texture of the bulk with a high accuracy. As the monomer is transformed to polymer, both the d. and adiabatic compressibility change, making the UPV closely related to the monomer conversion. This technique is based on the increase of UPV with rising elasticity of the medium due to the polymn. Th

Chemical incidents are typically caused by loss of control, resulting in runaway reactions or process deviations in different stages of the production. In the case of fed-batch reactors, the problem generally encountered is the accumulation of heat. This i ...

Handling and storing chemicals in the industrial world require a conscientious hazards assessment and the implementation of appropriate measures to ensure safety for the workers, the company, the environment and the society. Reliable evaluations and predic ...

Available risk analysis techniques are well adapted to industry since they were developed for its purpose. All hazards met in industry are also present in research/academia (although quantities of some hazardous substances are smaller). Still, because of i ...

Supercritical carbon dioxide (scCO2) is a promising foaming agent for the production of polymeric foams, representing an environmentally friendly alternative for the foaming agents currently used. During the expansion phase of the scCO2-foaming process, te ...

The technique of reaction calorimetry adapted for use with reactions in supercritical fluids was used to study some safety aspects of the free-radical dispersion polymerization of methyl methacrylate in scCO2. The reaction heat rate profile was found to ch ...

Chemical engineering as a skilled profession depends on the competencies of the individuals practicing it. Formal teaching of chemical engineering at universities only started in the 19th century. Informally, the subject has been in existence at least sinc ...

This book is a valuable resource for achieving and promoting a culture of risk awareness and integrating risk management principles and practices into the educational environment. This integration is essential to ensure that students have the knowledge and ...

The scale-up/-down of polymn. reactors has to deal with large viscosity changes during the process, addressing mass- and heat-transfer issues. A practical example on scale-up of styrene and Me methacrylate free radical bulk and soln. polymn. is presented. The main crit. parameters are mixing at mol. level (micromixing) and heat removal capacity. The operating parameters being kept const. are: reaction conditions (temp., pressure, chem.) and thus the reaction time. A pilot plant issued from scale-down of pos

Calorimetry (adiabatic, isothermal, differential, oscillating or acoustic) is generally based on heat-flow measurements of the studied system. Most of its applications are dedicated to kinetic-parameter detn., safety studies and process optimization, phase equil. and phase transition studies. Heat flow calorimetry on the lab. scale is currently limited to low viscosity fluids. An emerging new field is concerned with the use of calorimetry in the presence of supercrit. fluids as solvent reaction, which will

As the number of engineered nanomaterials (ENM) used in research increases with an incredible speed, health and safety specialists are continuously faced with the challenge of evaluating the risks involved with these materials. Nowadays there is not enough ...

A review. Scale-up and/or scale-down procedures are crucial during the development of chem. processes. These procedures should be integrated to form a multidisciplinary approach encompassing several branches of science and engineering. The challenge is to find a balance between chem., design, environment, hygiene and safety (EHS) compliance and economic factors. The iterative process of scale-up procedures also requires concept discrimination at early stages of process development. Scale-up studies should p

A complete anal. of the heat flow equation in reaction calorimetry with supercrit. fluids is presented. An esp. developed reaction calorimeter is employed to study the challenges introduced by the supercrit. state of the reaction mixt. and the particularit ...

The heat flow reaction calorimetry technique was developed for reactions with supercrit. fluids and was applied to monitor the free-radical dispersion polymn. of Me methacrylate in supercrit. carbon dioxide (scCO2). The main math. equation for the calorime ...

Thierry Meyer

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A systematic approach for thermal stability predictions of chemicals and their risk assessment: Pattern recognition and compounds classification based on thermal decomposition curves

On-line conversion monitoring through ultrasound velocity measurements in bulk styrene polymerization in a recycle reactor - part I: experimental validation

Plastics

Third-Generation Solar Cells: Toxicity and Risk of Exposure

Research and developments-where people are exposed to nanomaterials

Management of nanomaterials safety in research environment

Inline conversion monitoring in MMA high solid content polymerization process

FH HES Optimization of Chemical Reactor Feed by Simulations Based on a Kinetic Approach

Quantitative Structure-Property Relationships for Thermal Stability and Explosive Properties of Chemicals

Risk analysis in research environment

Temperature-induced morphology control in the polymer- foaming process

The important role of pressure in supercritical fluid process development revealed by reaction calorimetry

The importance/role of education in chemical engineering

Engineering risk management: Third Edition

Scale-Up of Polymerization Process: A Practical Example

Supercritical calorimetry: an emerging field

Managing Risks when Using Nanomaterials in Research

Scale-up of polymerization processes

Optimization of reaction calorimetry with supercritical fluids: A complete term-by-term analysis of the heat flow equation

Supercritical Reaction Calorimetry: Versatile Tool for Measuring Heat Transfer Properties and Monitoring Chemical Reactions in Supercritical Fluids