金钱草多糖对片烟干燥动力学特性的影响
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摘要
【目的】考察金钱草多糖保润剂对片烟原料干燥过程的影响规律,为从动力学角度理解保润剂对片烟原料的保润效果奠定理论基础。【方法】测试施加金钱草多糖保润剂的许昌片烟(X2F)原料在不同干燥温度的水分含量变化,确定原料水分散失的薄层干燥动力学方程,获得内部水分有效扩散系数及干燥活化能。【结果】金钱草多糖可增强片烟原料的持水能力,显著降低原料的干燥速率常数和水分有效扩散系数,添加纯水和施加保润剂原料的水分有效扩散系数分别在1.286 8×10-12～1.671 8×10-12m2/s和1.074 0×10-12～1.611 0×10-12 m2/s之间,干燥活化能分别为8.42 kJ/mol和13.9 kJ/mol。【结论】金钱草多糖可提高片烟原料的保润性能,二项分布指数函数模型和Page模型可较好地描述片烟原料水分散失历程,为从动力学角度理解保润剂对片烟干燥过程中水分散失的影响提供了思路。
[Purpose]We investigated the effectual rule of Lysimachia christinae polysaccharide(LCP) as a humectant on drying process of flue-cured tobacco lamina to understand the effect of the humectant on moisture retention of flue-cured tobacco lamina from a dynamic perspective. [Method]The moisture content variation of Xuchang flue-cured tobacco lamina(X2 F) through adding L. christinae polysaccharides under different drying temperature conditions was tested, the thin layer drying kinetics equation for the material moisture loss was determined, and the internal effective moisture diffusivities and activation energies were obtained.[Results]LCPs could enhance the moisture holding capacity of flue-cured tobacco lamina and markedly reduce drying rate constant and effective moisture diffusivity; moreover, the effective moisture diffusivities of adding pure water and applying humectant materials were 1.286 8×10-12-1.671 8×10-12 m2/s and 1.074 0×10-12-1.611 0×10-12 m2/s,respectively, and the drying activation energies were 8.42 kJ/mol and 13.9 kJ/mol, respectively.[Conclusion]LCPs could increase the moisture retention of flue-cured tobacco lamina materials.Two-term exponential model and Page model could better describe water desorption course for fluecured tobacco lamina materials, and this work would provide ideas for understanding the effect of humectant on water desorption during the drying process of flue-cured tobacco laminas.
[Purpose]We investigated the effectual rule of Lysimachia christinae polysaccharide(LCP) as a humectant on drying process of flue-cured tobacco lamina to understand the effect of the humectant on moisture retention of flue-cured tobacco lamina from a dynamic perspective. [Method]The moisture content variation of Xuchang flue-cured tobacco lamina(X2 F) through adding L. christinae polysaccharides under different drying temperature conditions was tested, the thin layer drying kinetics equation for the material moisture loss was determined, and the internal effective moisture diffusivities and activation energies were obtained.[Results]LCPs could enhance the moisture holding capacity of flue-cured tobacco lamina and markedly reduce drying rate constant and effective moisture diffusivity; moreover, the effective moisture diffusivities of adding pure water and applying humectant materials were 1.286 8×10-12-1.671 8×10-12 m2/s and 1.074 0×10-12-1.611 0×10-12 m2/s,respectively, and the drying activation energies were 8.42 kJ/mol and 13.9 kJ/mol, respectively.[Conclusion]LCPs could increase the moisture retention of flue-cured tobacco lamina materials.Two-term exponential model and Page model could better describe water desorption course for fluecured tobacco lamina materials, and this work would provide ideas for understanding the effect of humectant on water desorption during the drying process of flue-cured tobacco laminas.
引文
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[15]TORKI-HARCHEGANI M,GHASEMI-VARNAMK-HASTI M,GHANBARIAN D,et al.Dehydration characteristics and mathematical modelling of lemon slices drying undergoing oven treatment[J].Heat and Mass Transfer,2016,52(2):281.DOI:10.1007/s00231-015-1546-y.
[16]AGHBASHLO M,KIANMEHR M H,SAMIMI-AKHI-JAHANI H.Influence of drying conditions on the effective moisture diffusivity,energy of activation and energyconsumption during the thin-layer drying of berberis fruit(Berberidaceae)[J].Energy Conversion and Management,2008,49(10):2865.DOI:10.1016/j.enconman.2008.03.009.
[17]梁淼,侯佩,李晓,等.卷烟保润材料及作用机理研究进展[J].江西农业学报,2016,28(10):46.DOI:10.19386/j.cnki.jxnyxb.2016.10.10.
[18]尚善斋,雷萍,王昆淼,等.卷烟保润技术研究进展[J].应用化工,2014,43(3):535.DOI:10.16581/j.cnki.issn1671-3206.2014.03.046.
[19]郭俊成,吴达,程晓蕾,等.保润剂对烟草吸湿特性的影响研究[J].中国烟草学报,2013,19(4):22.DOI:10.3969/j.issn.1004-5708.2013.04.004.
[2]陈芝飞,孙志涛,芦昶彤,等.两种果糖衍生物的合成、卷烟保润性能及毒理学试验[J].烟草科技,2014(4):43.DOI:10.3969/j.issn.1002-0861.2014.04.009.
[3]张建文,辛亚男,李斌.干燥介质温湿度条件对片烟干燥动力学特性的影响[J].烟草科技,2014(10):15.DOI:10.3969/j.issn.1002-0861.2014.10.005.
[4]李建欣,代西梅,张佳佳,等.卷烟原料干燥动力学分析[J].湖北农业科学,2013,52(23):5788.DOI:10.3969/j.issn.0439-8114.2013.23.036.
[5]许春平,杨琛琛,高建奇,等.天然多糖的提取及其在卷烟中应用述评[J].郑州轻工业学院学报(自然科学版),2012,27(5):34.DOI:10.3969/j.issn.2095-476X.2012.05.008.
[6]刘洋,刘珊,胡军,等.仙人掌多糖的提取及其在卷烟中的应用[J].烟草科技,2010(10):8.DOI:10.3969/j.issn.1002-0861.2010.10.002.
[7]YALDIZ O,ERTEKIN C,UZUN H I.Mathematical modeling of thin layer solar drying of sultana grapes[J].Energy,2001,26(5):457.DOI:10.1016/S0360-5442(01)00018-4.
[8]RAHMAN M S,PERERA C O,THEBAUD C.Desorption isotherm and heat pump drying kinetics of peas[J].Food Research International,1997,30(7):485.DOI:10.1016/S0963-9969(98)00009-X.
[9]KARATHANOS V T,BELESSIOTIS V G.Application of a thin-layer equation to drying data of fresh and semidried fruits[J].Journal of Agricultural Engineering Research,1999,74(4):355.DOI:10.1006/jaer.1999.0473.
[10]ERBAY Z,ICIER F.A review of thin layer drying of foods:theory,modeling,and experimental results[J].Critical Reviews in Food Science and Nutrition,2010,50(5):441.DOI:10.1080/10408390802437063.
[11]黄锋,陈清,王乐,等.片烟增湿与干燥的薄层动力学模型[J].中国烟草学报,2014,20(6):34.DOI:10.3969/j.issn.1004-5708.2014.06.006.
[12]DOYMAZ?.Thin-layer drying characteristics of sweet potato slices and mathematical modelling[J].Heat and Mass Transfer,2011,47(3):277.DOI:10.1007/s00231-010-0722-3.
[13]何新益,程莉莉,刘金福,等.苹果片变温压差膨化干燥特性与动力学研究[J].农业机械学报,2012,43(5):130.DOI:10.6041/j.issn.1000-1298.2012.05.022.
[14]殷春燕,徐志强,汪华,等.贮藏过程中不同保润剂对烟丝保润效果及水分散失动力学的影响[J].西北农林科技大学学报(自然科学版),2014,42(1):96.DOI:10.13207/j.cnki.jnwafu.2014.01.020.
[15]TORKI-HARCHEGANI M,GHASEMI-VARNAMK-HASTI M,GHANBARIAN D,et al.Dehydration characteristics and mathematical modelling of lemon slices drying undergoing oven treatment[J].Heat and Mass Transfer,2016,52(2):281.DOI:10.1007/s00231-015-1546-y.
[16]AGHBASHLO M,KIANMEHR M H,SAMIMI-AKHI-JAHANI H.Influence of drying conditions on the effective moisture diffusivity,energy of activation and energyconsumption during the thin-layer drying of berberis fruit(Berberidaceae)[J].Energy Conversion and Management,2008,49(10):2865.DOI:10.1016/j.enconman.2008.03.009.
[17]梁淼,侯佩,李晓,等.卷烟保润材料及作用机理研究进展[J].江西农业学报,2016,28(10):46.DOI:10.19386/j.cnki.jxnyxb.2016.10.10.
[18]尚善斋,雷萍,王昆淼,等.卷烟保润技术研究进展[J].应用化工,2014,43(3):535.DOI:10.16581/j.cnki.issn1671-3206.2014.03.046.
[19]郭俊成,吴达,程晓蕾,等.保润剂对烟草吸湿特性的影响研究[J].中国烟草学报,2013,19(4):22.DOI:10.3969/j.issn.1004-5708.2013.04.004.
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