Freundlich方程在不同吸附剂的油脂脱色体系中的应用  

Applications of Freundlich Equation for Different Adsorbents in Oil Bleaching Process

作　　者：刘元法[1] 裘爱泳[1] 王兴国[1] 

机构地区：[1]江南大学食品学院,江苏无锡214036

出　　处：《食品与生物技术学报》2007年第1期1-4,共4页Journal of Food Science and Biotechnology

基　　金：国家自然科学基金项目(20376028)

摘　　要：油脂脱色体系属于稀溶液吸附体系,该体系中的吸附等温式最常用的是Langmuir方程和Freundlich方程,其中Freundlich方程更适合植物油脂脱色体系。作者对植物油脂脱色工艺中常用的3种吸附剂进行了研究,结果表明:在低浓度区时3种吸附剂都符合Freundlich吸附等温方程,K凹>K膨>K活,N凹>N膨>N活。凹凸棒石的K值和N值均为最大,大孔径范围的孔道和较多的表面酸性点使凹凸棒石不仅具有较强的吸附能力,而且具有较高的吸附强度。Edible oil bleaching system is classified as the dilute solution adsorption system. Langmuir equation and Freundlich equation are often used to descript adsorption system, and Freundlich equation is regarded as the suitable equation for edible oil bleaching system. The results indicated that, acitive bentonite, carbon adsorbent and attapulgite adsorbent oil bleaching process allow Freundlich equation in lower concentration region. The equation constants in following order ： Kattapulgite 〉 K bentonite〉 K carbon, N attapulgite 〉 Nbentonite 〉 Ncarbon. Wide range of micro aperture distribution and more surface acid site make attapulgite adsorbent exhibited high adsorbent ability.

关 键 词：FREUNDLICH方程 油脂脱色 吸附等温线 

分 类 号：TS221[轻工技术与工程—粮食、油脂及植物蛋白工程]