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Veszprem, Hungary

The University of Pannonia is a university located in Veszprém, Hungary. It was founded in 1949 and is organized in five faculties: Arts and Humanities, Engineering, Agriculture, Economics and Information Technology. Wikipedia.

Posfai M.,University of Pannonia | Buseck P.R.,Arizona State University
Annual Review of Earth and Planetary Sciences | Year: 2010

Aerosol particles in the atmosphere exert a strong influence on climate by interacting with sunlight and by initiating cloud formation. Because the tropospheric aerosol is a heterogeneous mixture of various particle types, its climate effects can only be fully understood through detailed knowledge of the physical and chemical properties of individual particles. Here we review the results of individual-particle studies that use microscopy-based techniques, emphasizing transmission electron microscopy and focusing on achievements of the past ten years. We discuss the techniques that are best suited for studying distinct particle properties and provide a brief overview of major particle types, their identification, and their sources. The majority of this review is concerned with the optical properties and hygroscopic behavior of aerosol particles; we discuss recent results and highlight the potential of emerging microscopy techniques for analyzing the particle properties that contribute most to climate effects. Copyright © 2010 by Annual Reviews. All rights reserved. Source

Skoda-Foldes R.,University of Pannonia
Molecules | Year: 2014

Catalysts obtained by the immobilisation of acidic ionic liquids (ILs) on solid supports offer several advantages compared to the use of catalytically active ILs themselves. Immobilisation may result in an increase in the number of accessible active sites of the catalyst and a reduction of the amount of the IL required. The ionic liquid films on the carrier surfaces provide a homogeneous environment for catalytic reactions but the catalyst appears macroscopically as a dry solid, so it can simply be separated from the reaction mixture. As another advantage, it can easily be applied in a continuous fixed bed reactor. In the present review the main synthetic strategies towards the preparation of supported Lewis acidic and Brønsted acidic ILs are summarised. The most important characterisation methods and structural features of the supported ionic liquids are presented. Their efficiency in catalytic reactions is discussed with special emphasis on their recyclability. Source

Varbanov P.S.,University of Pannonia
Current Opinion in Chemical Engineering | Year: 2014

The constant increase of the world-wide demand for water and energy makes it necessary to make their use more efficient. For supplying energy, so far mainly fossil fuels are used. The apparent link of energy and water supply increases the cost of delivery and, in many cases, causes shortages of all forms of energy and water. This paper reviews the main trends in the global flows of energy and water supply, identifies the inherent limitations and pays attention also to the concept of virtual water. The implications for industry and of some notable recent research efforts are also reviewed, and conclusions are drawn for the directions of possibly promising future research and development. © 2014 Elsevier Ltd. Source

Nagy E.,University of Pannonia
Separation and Purification Technology | Year: 2010

The effect of the concentration boundary layer on the membrane separation is well known and intensively discussed in the literature. In most of these studies, the effect of the membrane layer on the separation is missing. Recently, some papers have been published which take into account both the concentration polarization layer and the membrane layer on the membrane separation by means of pervaporation. These papers use mostly the resistance-in-series model and try to incorporate the effect of the boundary layer's Peclet number, as well. These models do not make possible the direct calculation of the separation characteristics, e.g. the enrichment or the polarization modulus. A coupled model of concentration polarization and diffusion transport through the membrane was developed which enables the direct prediction of the concentration distribution in both layers and other important separation properties as enrichment, polarization modulus, etc. The calculated data are compared with the experimental ones taken from the literature. The excellent agreement between the measured and predicted data proves that the equations developed are suitable to describe the pervaporation process or to predict its effectiveness. It has also been demonstrated the strong effect of the membrane properties on the concentration distribution of both layers and on the mass transfer rate, consequently on the separation efficiency. © 2010 Elsevier B.V. All rights reserved. Source

Friedler F.,University of Pannonia
Applied Thermal Engineering | Year: 2010

Energy saving, global warming and greenhouse gas emissions have become major technological, societal, and political issues. Being closely related to energy supply, they are of a strategic importance. Various conferences are being organised for providing international venues for closer cooperation among researchers. The series of conferences "Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction" (PRES) play a pioneering role in contributing to the solution of the related problems through presenting new methodologies and initiating cooperation among participants that often result in international projects. The PRES conferences have been dedicated both to the theoretical and to the practical aspects of energy saving and pollution reduction. The PRES series, established thirteen years ago, was originally dedicated to energy integration and improving thermal efficiency. Following the new challenges and priorities, the scope of the conferences has been extended to include all energy and pollution prevention related issues. This contribution focuses on the period covered by PRES, reviewing at least some major presentations contributing to the development of process integration and optimisation tools for energy saving and pollution reduction. The development of the mathematical models has been covered as well, since it is closely related to the area. © 2010 Elsevier Ltd. All rights reserved. Source

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