Drying of Porous Materials

Thermal drying has been recognized as an important unit operation as it is ener- intensive and has a decisive effect on the quality of most products that are dried commercially. Escalating energy costs, demand for eco-friendly and sustainable te- nologies as well as the rising consumer demand for higher quality products, have given fresh incentives to industry and academia to devote great effort to drying R&D. Fortunately, this area does not demand a massive perfusion of R&D funds to come up with valuable insights and innovations, with only a few exceptions. Indeed, there is already a sustainable level of R&D supportboth in terms of human and ?nancial resourcesaround the world. Emerging economies of the world, such as China, B- zil, India, etc, have picked up the slack caused by the fully developed economies of the west moving towards nanotechnologies. Overall, the global R&D effort has been rising despite precipitous drops in North America and Europe. With 1225% of the national industrial energy consumption attributable to industrial drying in developed countries, it is only a matter of time before high energy costs will stimulate further R&D in drying.

Klappentext

This book provides recent advances in research on drying of saturated particulates and porous materials. The present volume is based on the selected papers presented at the XI Polish Drying Symposium 2005. The selected contributions cover theoretical modeling as well as experimental research on heat and mass transfer in porous and multiphase media during drying. The comprehensiveness and profound treatment of the subject makes this book an excellent pioneering contribution to the science and technology of drying of particulate solids.

Audience: These articles written by experts in the field will be of interest not only to academic and researches in porous media but also to engineers active in food processes, nanotechnology or reaction technology.

Inhalt
Preface.- An overview of innovation in industrial drying: current status and R&D needs.- Modern methods of drying nanomaterials.- Internal heating effect and enhancement of drying of ceramics by microwave heating with dynamic control.- The vapour-liquid interface and stresses in dried bodies.- Multiscale aspects of heat and mass transfer during drying.- Theoretical models of vegetable drying by convection.- Analysis of the mechanism of counter-current spray drying.- Modern modelling methods in drying.- Non-linear heat and mass transfer during convective drying of kaolin cylinder under non-steady conditions.- Effects of the method of identification of the diffusion coefficient on accuracy of modeling bound water transfer in wood.- Stresses in dried wood. Modelling and experimental identification.- Kinetics of atmospheric freeze-drying of apple.- Microwave drying of various shape particles suspended in an air stream.- Periodic fluctuations of flow and porosity in spouted beds.- Modeling of vacuum desorption of multicomponent moisture in freeze drying.- Optimization of fine solid drying in bubble fluidized bed.