Effect of radial impeller size in the presence and absence of baffles on the copper exchange on zeolite NaX

IF 0.7 Q3 ENGINEERING, MULTIDISCIPLINARY

Engineering Review Pub Date : 2021-01-01 DOI:10.30765/er.1574

Sandra Svilović, M. Ćosić, Anita Bašić

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引用次数: 3

Abstract

Effect of hydrodynamics on ion exchange in a batch reactor is still not appropriately studied even though proper mixing parameters may considerably affect the process of solid suspension and its costs. In this work, hydrodynamic conditions generated by straight blade turbine (SBT) impellers on suspension in the batch reactor with and without baffles were investigated. The aim of this work was to analyze influence of impeller diameter and zeolite mass on just suspended impeller speed, (NJS) power consumption, maximum amount of copper exchanged onto zeolite NaX and copper exchange kinetics as well. All experiments were conducted at the same temperature, initial concentration of the copper solution and zeolite particle size. The obtained results showed that just suspended impeller speed decreases as impeller diameter increases in the reactor with and without baffles but this trend is considerably more pronounced in the reactor with baffles. The increase in zeolite mass causes a slight increase of NJS in the both reactor. In the reactor with the baffles this increment became noticeably higher as impeller diameter decrease. Power consumption, at the state of complete zeolite suspension, decreases as impeller diameter increases and its values in the reactor without baffles are considerably lower as well. Kinetics results indicated that the amount of copper ion increases significantly in the initial stage and then gradually until the equilibrium is reached for all hydrodynamics conditions and mass of zeolite examined.

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有无挡板时径向叶轮尺寸对NaX沸石上铜交换的影响

流体力学对间歇反应器中离子交换的影响尚未得到适当的研究，尽管适当的混合参数对固体悬浮过程及其成本有很大的影响。本文研究了带挡板和不带挡板的间歇式反应器中直叶涡轮(SBT)叶轮悬浮时的水动力条件。分析了叶轮直径和沸石质量对刚悬浮叶轮转速、(NJS)功耗、铜在沸石NaX上的最大交换量和铜交换动力学的影响。所有实验均在相同温度、铜溶液初始浓度和沸石粒径下进行。结果表明，在有挡板和不加挡板的反应器中，刚悬浮叶轮转速随叶轮直径的增大而减小，但在有挡板的反应器中这种趋势更为明显。沸石质量的增加导致两个反应器中NJS的轻微增加。在有挡板的反应器中，随着叶轮直径的减小，该增量明显增大。沸石完全悬浮状态下的能耗随着叶轮直径的增大而减小，无挡板反应器的能耗值也明显降低。动力学结果表明，在所有流体力学条件和沸石质量条件下，铜离子的量在初始阶段显著增加，然后逐渐增加，直到达到平衡。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Review ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

0.00%

发文量

期刊介绍： Engineering Review is an international journal designed to foster the exchange of ideas and transfer of knowledge between scientists and engineers involved in various engineering sciences that deal with investigations related to design, materials, technology, maintenance and manufacturing processes. It is not limited to the specific details of science and engineering but is instead devoted to a very wide range of subfields in the engineering sciences. It provides an appropriate resort for publishing the papers covering prior applications – based on the research topics comprising the entire engineering spectrum. Topics of particular interest thus include: mechanical engineering, naval architecture and marine engineering, fundamental engineering sciences, electrical engineering, computer sciences and civil engineering. Manuscripts addressing other issues may also be considered if they relate to engineering oriented subjects. The contributions, which may be analytical, numerical or experimental, should be of significance to the progress of mentioned topics. Papers that are merely illustrations of established principles or procedures generally will not be accepted. Occasionally, the magazine is ready to publish high-quality-selected papers from the conference after being renovated, expanded and written in accordance with the rules of the magazine. The high standard of excellence for any of published papers will be ensured by peer-review procedure. The journal takes into consideration only original scientific papers.