Design and analysis of continuous-flow reactors for copper sulfide precipitation process by a computational method

Yang, Zhihui; Li, Bo; Zeng, Weizhi; Li, Ken; Liu, Shan; Hu, Hui; Guo, Wenxiang

doi:10.1007/s11356-019-06512-0

Cited by 10 publications

(8 citation statements)

References 38 publications

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“…where r Cu2+ and r S2− represents the reaction rates of copper (Cu 2+ ) and sulfide (S 2− ), respectively, k is the reaction rate constant, [Cu 2+ ] is the copper concentration, and [S 2− ] is the sulfide concentration. The k value obtained was 9.989 mol s −1 m −3 [71] with a regression of R 2 = 0.9957. These results confirm the validity of the kinetic model proposed in Equation ( 9), although this assessment was performed for one concentration of copper and sulfide, respectively.…”

Section: Reaction Timementioning

confidence: 89%

“…This gap of knowledge limits the extrapolation and scaling-up of lab-scale results to different operational conditions. Yang and colleagues [71] reported the only study where a kinetic model for copper precipitation was proposed, according to the following equation:…”

Section: Reaction Timementioning

confidence: 99%

“…In this vein, the operational behavior of three continuous-flow sulfide precipitation reactors (CFSPR) was analyzed through mathematical modeling and experimental studies [71] performing different sulfide dosage configurations, as shown in Figure 4. Reactor N • 3 reached a better performance due to the ideal mixing state and suitable retention time.…”

Section: Reactor Typementioning

confidence: 99%

Section: Kinetic Studiesmentioning

confidence: 99%

“…Likewise, when H 2 S gas is used, establishing the controlling stage of process velocity should be considered [70]. The first order model proposed by Yang and colleagues [71] was determined using a small quantity of experimental data and is limited to CuS. Through this process, the correct design of reactors should be based on proper kinetic models for each specific application.…”

Section: Kinetic Studiesmentioning

confidence: 99%

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Metal Sulfide Precipitation: Recent Breakthroughs and Future Outlooks

2021

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The interest in metal sulfide precipitation has recently increased given its capacity to efficiently recover several metals and metalloids from different aqueous sources, including wastewaters and hydrometallurgical solutions. This article reviews recent studies about metal sulfide precipitation, considering that the most relevant review article on the topic was published in 2010. Thus, our review emphasizes and focuses on the overall process and its main unit operations. This study follows the flow diagram definition, discussing the recent progress in the application of this process on different aqueous matrices to recover/remove diverse metals/metalloids from them, in addition to kinetic reaction and reactor types, different sulfide sources, precipitate behavior, improvements in solid–liquid separation, and future perspectives. The features included in this review are: operational conditions in terms of pH and Eh to perform a selective recovery of different metals contained in an aqueous source, the aggregation/colloidal behavior of precipitates, new materials for controlling sulfide release, and novel solid–liquid separation processes based on membrane filtration. It is therefore relevant that the direct production of nanoparticles (Nps) from this method could potentially become a future research approach with important implications on unit operations, which could possibly expand to several applications.

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Section: Reaction Timementioning

confidence: 89%

Section: Reaction Timementioning

confidence: 99%

Section: Reactor Typementioning

confidence: 99%

Section: Kinetic Studiesmentioning

confidence: 99%

Section: Kinetic Studiesmentioning

confidence: 99%

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