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首页> 外文期刊>Chemical engineering journal >Insight into mass transfer during ultrasound-enhanced adsorption/desorption of blueberry anthocyanins on macroporous resins by numerical simulation considering ultrasonic influence on resin properties
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Insight into mass transfer during ultrasound-enhanced adsorption/desorption of blueberry anthocyanins on macroporous resins by numerical simulation considering ultrasonic influence on resin properties

机译：通过数值模拟考虑超声波对树脂性能的数值模拟，在大孔树脂上进行超声增强的型吸附/解吸在大孔树脂上的超声波型吸附/解吸的洞察

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摘要

The mass transfer mechanism about ultrasonic enhancement of blueberry anthocyanin adsorption and desorption on macroporous resins were investigated. Ultrasound treatment led to the decrease of resin size, whereas average pore diameter, specific surface area, total pore volume were less affected. Then, the pore volume and surface diffusion model considering ultrasound-induced changes of particle size and surface area was employed to model anthocyanin adsorption process numerically. Generally, sonication enhanced external mass transfer coefficient (k(L)) and surface diffusion coefficient (D-s) during adsorption. The values of k(L) and D-s under sonication at 279 W/L and 20 degrees C were 7.578 x 10(-2) cm/s and 2.000 x 10(-9) cm(2)/s, which were 2.0% and 140.1% higher than the k(L) and D-s values under orbital agitation at 20 degrees C. Accordingly, anthocyanins penetrated into the interior of macroporous resins faster under sonication. The overall intraparticle diffusion for anthocyanin adsorption was dominated by pore volume diffusion with the contribution percentage higher than 50%. Sonication enhanced the contribution of surface diffusion to the overall diffusion, which was consistent with the increase of D-s with ultrasound energy. Moreover, a general diffusion model also incorporating the variations of particle size and surface area was utilized to model anthocyanin desorption process. The overall anthocyanin diffusivity increased with both ultrasound energy level and temperature. Anthocyanins distributed more homogenously inside resins under sonication at 279 W/L than under other treatments. This work could be a reference for the valorization of anthocyanins in food industry, especially juice and wine industries.
机译：研究了对蓝莓花青素吸附和对大孔树脂吸附和解吸的超声波增强的传质机制。超声处理导致树脂尺寸的降低，而平均孔径，比表面积，总孔隙体积较小。然后，考虑超声诱导的粒度和表面积变化的孔体积和表面扩散模型用于数值模拟花青素吸附过程。通常，在吸附期间，超声处理增强的外部传质系数（K（L））和表面扩散系数（D-S）。在279w / l和20℃下超声处理的K（l）和Ds的值为7.578×10（-2）cm / s和2.000×10（-9）cm（2）/ s，为2.0％在20摄氏度下，眶下搅拌下的K（L）和DS值高140.1％。因此，在超声处理下更快地穿透到大孔树脂内部的花青素。花青素吸附的总体粒前扩散是由孔体积扩散的主导，贡献率高于50％。超声处理增强了表面扩散对整体扩散的贡献，这与具有超声能量的D-S的增加一致。此外，还利用含有粒度和表面积变化的一般扩散模型来模拟花青素解吸过程。整体花青素扩散率随着超声能级和温度而增加。花青素在279 w / l的超声处理中分布更均匀的内部树脂，而不是在其他治疗下。这项工作可能是食品工业中花青素，特别是果汁和葡萄酒产业的算子的参考。

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