氢氧化钙处理鲜马铃薯渣干燥动力学研究

Drying kinetics of fresh potato residue treated by calcium hydroxide

中文关键词:  Ca(OH)2  鲜马铃薯渣  水分有效扩散系数  干燥活化能  干燥动力学

英文关键词:Ca(OH)2  fresh potato residue  water effective diffusion coefficient  dry activation energy  drying kinetics

中文摘要:

      目的 探讨氢氧化钙[Ca(OH)2]处理鲜马铃薯渣的干燥效率及其干燥动力学。方法 研究干燥温度(30、40、50、60℃)、相对湿度(13%、33%、54%、75%)和载物量(10、30、50、70 g)对Ca(OH)2处理鲜马铃薯渣的干燥曲线、干燥速率曲线、水分有效扩散系数以及干燥活化能的影响, 并建立干燥动力学模型, 将干燥特性曲线进行非线性拟合。结果 Ca(OH)2处理鲜马铃薯渣主要为降速干燥, 干燥温度越高, 相对湿度越低, 载物量越少, 鲜马铃薯渣的干燥速率越快, 水分有效扩散系数为2.48554×10?11~13.15592×10?11 m2/s, 干燥活化能为12.06 kJ/mol。Logarithmic为Ca(OH)2处理鲜马铃薯渣拟合程度最好的干燥动力学模型。结论 经Ca(OH)2处理的鲜马铃薯渣较容易干燥, Logarithmic模型可以较好描述其水分变化规律, 为描述和预测Ca(OH)2处理鲜马铃薯渣干燥过程中的水分变化规律提供了依据。

英文摘要:

      Objective To investigate the drying efficiency and the drying kinetics of fresh potato residue treated by calcium hydroxide [Ca(OH)2]. Methods The effects of drying temperature (30, 40, 50, 60℃), relative humidity (13%, 33%, 54%, 75%) and load (10, 30, 50, 70 g) on drying curve, drying rate curve, effective diffusion coefficient of water and drying activation energy of fresh potato residue treated by Ca(OH)2 were studied, and a drying kinetic model of it was established. The drying characteristic curve was nonlinear fitted. Results The higher the drying temperature, the lower the relative humidity and the lower the load, the faster the drying rate of fresh potato residue, the effective diffusion coefficient of water was 2.48554×10?11?13.15592×10?11 m2/s, and the drying activation energy was 12.06 kJ/mol. Logarithmic model was the best fitting degree. Conclusion Fresh potato pomace treated with Ca(OH)2 is easier to dry, and the Logarithmic model can better describe its moisture change pattern, providing a basis for describing and predicting the moisture change pattern during the drying process of fresh potato pomace treated with Ca(OH)2.