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Extractive desulfurization in microchannels with polyethylene glycol 400: An experimental study and mass transfer evaluation
Chemical Engineering and Processing: Process Intensification ( IF 4.3 ) Pub Date : 2022-08-13 , DOI: 10.1016/j.cep.2022.109096
Luiz E.P. Santiago , Maxwell G. Silva , Eledir V. Sobrinho , Juan A.C. Ruiz , Carlos E.A. Padilha , Domingos F.S. Souza

Conventional methods for removing sulfur compounds show unsatisfactory performance, especially when treating aromatic compounds. Current studies have directed efforts to investigate extraction desulfurization (EDS) using microdevices to overcome this difficulty. These units are designed with micrometer-sized channels responsible for intensifying heat and mass transfer phenomena. When using EDS, an adequate choice of extraction solvent is essential and among the possibilities, an excellent candidate for extraction solvent is polyethylene glycol (PEG). The present work studied the extractive performance offered by microdevices and the aspects related to mass transfer intensification by adopting PEG 400 as an extraction solvent in the removal of dibenzothiophene. The identification of flow patterns was performed by digital image colorimetry, making it possible to estimate the specific interfacial area (as) and the overall mass transfer coefficient (KLas) more accurately. DBT decontamination behavior was investigated under different volumetric flow rates (71.74–326.58 μL/min), different microchannel lengths (1.0–2.0 m), and a fixed diameter of 0.5 mm. The best result achieved an extractive efficiency of 94.06%, corresponding to a volumetric flow rate of 107.30 μL/min, whose interfacial area and overall mass transfer coefficients related to the slug flow pattern were calculated as 453.69 m−1 and 0.0229 s1, respectively.



中文翻译:

聚乙二醇 400 微通道萃取脱硫:实验研究和传质评价

去除硫化合物的常规方法表现出不令人满意的性能,尤其是在处理芳族化合物时。目前的研究已经致力于研究使用微型装置来克服这一困难的萃取脱硫 (EDS)。这些装置设计有微米级通道,负责加强传热和传质现象。使用 EDS 时,必须选择适当的萃取溶剂,在多种可能性中,一种极好的萃取溶剂候选者是聚乙二醇 (PEG)。本工作通过采用 PEG 400 作为萃取溶剂去除二苯并噻吩,研究了微器件提供的萃取性能以及与传质强化相关的方面。流动模式的识别是通过数字图像比色法进行的,一个s) 和总传质系数 (ķ大号一个s) 更精确地。DBT去污行为在不同的体积流量(71.74-326.58μL/min)、不同的微通道长度(1.0-2.0 m)和0.5 mm的固定直径。最佳结果达到 94.06% 的提取效率,对应于 107.30 的体积流量μL/min,其与团状流模式相关的界面面积和总传质系数计算为453.69 m -1和0.0229s-1, 分别。

更新日期:2022-08-13
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