Research on microwave drying technology in the procedure of preparation of V2O5 from ammonium polyvanadate (APV)

2021 ◽  
Author(s):  
Hewen Zheng ◽  
Qiannan Li ◽  
Yeqing Ling ◽  
Mamdouh Omran ◽  
Lei Gao ◽  
...  
Keyword(s):  
Microwave Drying ◽  
Drying Technology

scholarly journals Estimation of moisture ratio for apple drying by convective and microwave methods using artificial neural network modeling

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Vali Rasooli Sharabiani ◽  
Mohammad Kaveh ◽  
Roozbeh Abdi ◽  
Mariusz Szymanek ◽  
Wojciech Tanaś
Keyword(s):  
Specific Energy Consumption ◽  
Effective Diffusivity ◽  
Moisture Ratio ◽  
Microwave Drying ◽  
Convective Drying ◽  
Neural Network Modeling ◽  
Drying Methods ◽  
Apple Slices ◽  
Artificial Neural ◽  
Drying Technology

AbstractTwo different drying methods were applied for dehydration of apple, i.e., convective drying (CD) and microwave drying (MD). The process of convective drying through divergent temperatures; 50, 60 and 70 °C at 1.0 m/s air velocity and three different levels of microwave power (90, 180, and 360 W) were studied. In the analysis of the performance of our approach on moisture ratio (MR) of apple slices, artificial neural networks (ANNs) was used to provide with a background for further discussion and evaluation. In order to evaluate the models mentioned in the literature, the Midilli et al. model was proper for dehydrating of apple slices in both MD and CD. The MD drying technology enhanced the drying rate when compared with CD drying significantly. Effective diffusivity (Deff) of moisture in CD drying (1.95 × 10−7–4.09 × 10−7 m2/s) was found to be lower than that observed in MD (2.94 × 10−7–8.21 × 10−7 m2/s). The activation energy (Ea) values of CD drying and MD drying were 122.28–125 kJ/mol and 14.01–15.03 W/g respectively. The MD had the lowest specific energy consumption (SEC) as compared to CD drying methods. According to ANN results, the best R2 values for prediction of MR in CD and MD were 0.9993 and 0.9991, respectively.

scholarly journals Novel Drying Methods for Sustainable Upcycling of Brewers’ Spent Grains as a Plant Protein Source

2020 ◽  
Vol 12 (9) ◽  
pp. 3660 ◽  
Author(s):  
Anubhav Pratap Singh ◽  
Ronit Mandal ◽  
Maryam Shojaei ◽  
Anika Singh ◽  
Przemysław Łukasz Kowalczewski ◽  
...  
Keyword(s):  
Panel Study ◽  
Microwave Drying ◽  
Drying Methods ◽  
Brewing Industry ◽  
Drying Time ◽  
Overall Acceptability ◽  
Process Waste ◽  
Spent Grains ◽  
Energy And Exergy Analysis ◽  
Drying Technology

Brewers’ spent grains (BSGs) are the most important by-product of the brewing industry and are rich in protein and fiber. However, abundant amounts of BSGs are discarded annually worldwide. This project aimed to employ and compare innovative drying techniques to introduce snacks with protein sources derived from leftover BSGs. This study explored the dehydration kinetics of BSGs and the effect of three different drying methods—oven drying (OD), freeze drying (FD), and vacuum microwave drying (VMD)—on their protein content and functionality. Then, an energy and exergy analysis for the drying methods was given. Accordingly, a snack product (baked chips) using the dehydrated BSGs was developed by a sensory panel study to assess consumer acceptability of the final products. It was found that the VMD process took less drying time (48 min) compared to OD (50 min), with higher effectiveness as a drying process. VMD-treated BSG also showed moderate protein functionality and the highest overall acceptability when used in baked chips. Thus, VMD might be used as a sustainable drying technology for thermal treatment and valorization of BSG. In addition to having implications for dietary health, findings can help improve the economy of the breweries and other industries that deal with the processing of grains by valorizing their process waste and contributing to sustainability.

Mechanism on Mass Transfer in Micro-Scale During the Microwave Drying of Plant Porous Materials

2009 ◽  
Author(s):  
Junhong Yang ◽  
Qianqian Di ◽  
Jun Zhao ◽  
Liqiu Wang
Keyword(s):  
Porous Material ◽  
Moisture Transfer ◽  
Parenchyma Cell ◽  
Dominant Mode ◽  
Microwave Drying ◽  
Drying Time ◽  
Processing Technologies ◽  
Transfer Path ◽  
Important Processing ◽  
Drying Technology

Astragalus slice is one species of stem and root medicinal herb with the widely curative effects, also a special and typical plant porous material, and the drying operation is one of important processing technologies in its storage and further practical application. This paper characterizes the microstructure of Astragalus slices dried by microwave technique at 200 W by using scanning electronic microscope (SEM). The study also compares Astragalus slices dried by microwave with those untreated and discusses the drying mechanism. Result shows that as compared to the untreated sample, the microwave dried sample behaves much shorter drying time with more and larger pore and open structure on the surface layer of matrix, but without significant change about the distribution status of cytoplasm inside parenchyma cells. Further analysis suggests that the vapor diffusion is the dominant mode of moisture transfer inside matrix during the microwave drying process of sample, resulting in the well-preserved structures of sample, including parenchyma cell and trachea. This is also helpful for maintaining the distribution status of cytoplasm, particularly avoiding the agglomeration of biological macro-molecular, which is benefit to improving the permeability of moisture transfer path, leading to the rapidly dehydration of moisture. This work seems to be helpful for developing the optimized drying technology of plant porous material focused on micro-mechanism and the quality of dried products.

Physical Properties of Cuttings, Drilling Fluid and Organic Phase Recovered in the Drying Operation in Oil and Gas Well Drilling

2014 ◽  
Vol 802 ◽  
pp. 262-267 ◽  
Author(s):  
Marina Seixas Pereira ◽  
Ronaldo de Andrade Martins ◽  
André Leibsohn Martins ◽  
Marcos Antônio de Souza Barrozo ◽  
Carlos Henrique Ataíde
Keyword(s):  
Organic Phase ◽  
Oil And Gas ◽  
Drilling Fluid ◽  
Microwave Drying ◽  
Drilling Fluids ◽  
Well Drilling ◽  
Oil Companies ◽  
Alternative Technologies ◽  
Particle Size And Shape ◽  
Drying Technology

Oil companies have increasingly invested in alternative technologies for cuttings treatment. The research for new operations or equipments leads to investigate the properties and characteristics of drilled cuttings and drilling fluids. This work presents the physical characterization of cuttings, drilling fluid and organic phase recoved after cuttings drying. It was carried out analysis of rheology for the drilling fluid and particle size and shape for the cuttings. Considering the microwave drying technology, which has been investigated for cuttings treatment, it was also determined the dielectric properties for the drilling fluid. The quality of the organic phase recovered in the microwave cuttings drying was also analysed.

Viscoelastic Characterization of Microwave Drying Nature Rubber

2011 ◽  
Vol 291-294 ◽  
pp. 1344-1350
Author(s):  
Fu Quan Zhang ◽  
Yong Zhou Wang ◽  
Mei Chen ◽  
Mao Fang Huang
Keyword(s):  
Rheological Behavior ◽  
Viscoelastic Properties ◽  
Microwave Drying ◽  
Hot Air Drying ◽  
Air Drying ◽  
Hot Air ◽  
Drying Technology

Nature rubber (NR) is neither completely viscous nor elastic in nature, but viscoelastic in their properties. In the experiment, we used two types of equipments named rubber process analyzer (RPA) 2000 and mooney viscometer to characterize the viscoelastic properties of NR dried by microwave and hot-air, respectively. In present research, RPA tests on uncured NR dried by different methods were carried out using frequency and strain sweeps, and Mooney viscometer was detected using the big rotor at 100°C. The results showed that microwave drying has not influenced the viscoelastic properties of NR greatly, without changing the profiles of its rheological behavior. Compared with hot-air drying, the properties of NR dried by microwave improved significantly. As a new application, microwave drying technology offered an alternative way to the drying of NR.

scholarly journals Estimation of Moisture Ratio and Specific Energy Consumption for Apple Slices Drying by Convective and Microwave Methods using Neural Network Modeling

2021 ◽  
Author(s):  
Vali Rasooli Sharabiani ◽  
Abdi Roozbeh ◽  
Mohammad Kaveh ◽  
Mariusz Szymanek ◽  
Wojciech Tanaś
Keyword(s):  
Specific Energy Consumption ◽  
Effective Diffusivity ◽  
Moisture Ratio ◽  
Microwave Drying ◽  
Convective Drying ◽  
Neural Network Modeling ◽  
Drying Methods ◽  
Air Velocity ◽  
Apple Slices ◽  
Drying Technology

Abstract Two different drying methods were applied for dehydration of apple, i.e., convection drying (CD) and microwave drying (MD). The process of convection drying through divergent temperatures; 50, 60 and 70°C at 1.0 m/s air velocity and three different levels of microwave power (90, 180, and 360 W) were studied. In the analysis of the performance of our approach on moisture ratio of apple slices, artificial neural networks (ANNs) was used to provide with a background for further discussion and evaluation. In order to evaluate the models mentioned in the literature, the Midilli et al. model was proper for dehydrating of apple slices in both MD and CD. The microwave drying technology enhanced the drying rate when compared with convective drying significantly. Effective diffusivity of moisture in CD drying (1.95×10−7 - 4.09×10−7 m2/s) was found to be lower than that observed in MD (2.94×10−7–8.21×10−7 m2/s). The Ea values of convective drying and microwave drying were 122.28- 125 kJ/mol and 14.01- 15.03 W/g respectively. The MD had the lowest SEC as compared to CD drying methods. According to ANN results, the best values for predication of MR in CD and MD were 0.9993 and 0.9990, respectively.

Optimization of a hybrid sludge drying system with flush drying and microwave drying technology

2019 ◽  
Vol 148 ◽  
pp. 68-74 ◽  
Author(s):  
Hanki Eom ◽  
Young Hee Jang ◽  
Dong Yoon Lee ◽  
Sung Su Kim ◽  
Sang Moon Lee ◽  
...  
Keyword(s):  
Microwave Drying ◽  
Drying System ◽  
Drying Technology ◽  
Sludge Drying

Comparative Research on Oven Drying and Microwave Drying of Municipal Sludge

2013 ◽  
Vol 295-298 ◽  
pp. 1408-1413
Author(s):  
Jin Ping Li ◽  
Yun Jiao Hu ◽  
Zi Jun Hu
Keyword(s):  
Comparative Research ◽  
Scientific Basis ◽  
Microwave Drying ◽  
Engineering Practice ◽  
Municipal Sludge ◽  
Oven Drying ◽  
Drying Technology ◽  
Sludge Drying ◽  
Drying Efficiency ◽  
Short Time

The paper mainly targets at investigating municipal sludge drying technology which is efficient and economical. Use the oven, the microwave and the combination of both to study on the factors of the drying efficiency. The research found that the thinner sludge is easier to be dried, additionally, combining these two ways, which means to dry the sludge with dry box for a short time and then use the microwave to dry the sludge can greatly improve the drying efficiency. The research conclusions will provide a scientific basis for municipal sludge drying and semi-drying engineering practice, with some guiding significance.

scholarly journals Dynamic absorption efficiency of paracetamol powder in microwave drying

2019 ◽  
Vol 38 (2019) ◽  
pp. 715-725 ◽  
Author(s):  
Di Zhai ◽  
Fucheng Zhang ◽  
Cong Wei ◽  
Xiaobiao Shang ◽  
Junruo Chen ◽  
...  
Keyword(s):  
Water Content ◽  
Absorption Efficiency ◽  
Microwave Drying ◽  
Thickness Direction ◽  
Technology Research ◽  
Pharmaceutical Powder ◽  
Absorption Performance ◽  
Drying Technology ◽  
Drying Efficiency ◽  
Temperature Water

AbstractIn microwave drying technology, research into the dynamic absorbing properties of the powder is indispensable. In this study, the reflection loss coefficient of paracetamol powder under different temperature, water content, and thickness was calculated based on the principle of electromagnetic wave transmission. The results show that the absorption performance of powder fluctuates dynamically with a series of absorption peaks, and the position of the absorption peak shifts toward the smaller thickness direction as the water content increases or the temperature rises. Because of the influence of the powder thickness on absorbing efficiency, the powder thickness should be adjusted in real time to increase drying efficiency. This study provides the thickness range for which the absorption performance of paracetamol powder under different conditions is over 99%. This study is of great significance for understanding the drying mechanism and optimizing process parameters for microwave drying of pharmaceutical powder.

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