Comparative Study of the Characteristics of Oil Shale with Hot Air Drying and Microwave Drying

AbstractBy using the digital electric drying oven and microwave drying system, experiment select different microwave power and different hot air temperature for oil shale drying. The results indicated that: microwave drying is faster than hot air drying by an order of magnitude; microwave drying of oil shale is obviously classified into three phases: warming-up, constant rate and falling-rate periods. Drying took place mainly in constant rate and falling-rate periods. Through the analysis of experimental data processing, we can see that microwave drying is not suitable for Page's model, while hot air drying using Page model is fitting