Quanxian Hua , Junyang Ma , Pin Xu , Shu Zhang , Jingjing Rong , Zehao Chen
{"title":"废催化剂中钒的超高效水热酸浸工艺","authors":"Quanxian Hua , Junyang Ma , Pin Xu , Shu Zhang , Jingjing Rong , Zehao Chen","doi":"10.1016/j.mineng.2025.109777","DOIUrl":null,"url":null,"abstract":"<div><div>Recovery of vanadium from spent selective catalytic reduction (SCR) catalysts is a critical challenge. This study explores hydrothermal acid leaching as a novel approach for extracting vanadium, analyzing key parameters such as leaching agent concentration, liquid–solid ratio, reaction temperature, and leaching time. Using the Box-Behnken design (BBD) and response surface method, the effects and interactions of these parameters on vanadium leaching efficiency were investigated.<!--> <!-->Mechanistically, sulfuric acid concentration governs vanadium dissolution into VO<sub>2</sub><sup>+</sup>/VO<sup>2+</sup>, while excessive acid or improper liquid–solid ratios induce titanium precipitation (TiOSO<sub>4</sub>/Ti(SO<sub>4</sub>)<sub>2</sub>) that encapsulates particles and captures vanadium ions.<!--> <!-->The results showed that leaching agent concentration optimization significantly enhanced vanadium recovery by suppressing these side reactions. The interaction between liquid–solid ratio and leaching time, as well as liquid–solid ratio and reaction temperature, significantly affected efficacy. Optimal conditions were determined as 2.13 mol · L<sup>−1</sup> H<sub>2</sub>SO<sub>4</sub>, 23.85 mL · g<sup>−1</sup>, 143 °C, and 89 min, achieving 99.76 % vanadium leaching. XRD and SEM-EDS revealed stable leaching slag structure, indicating its potential for subsequent metal recovery. This study highlights hydrothermal acid leaching as a sustainable method for vanadium recovery, contributing to resource conservation and waste reduction.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"234 ","pages":"Article 109777"},"PeriodicalIF":5.0000,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hydrothermal acid leaching process with ultra-high efficiency for vanadium from spent catalyst\",\"authors\":\"Quanxian Hua , Junyang Ma , Pin Xu , Shu Zhang , Jingjing Rong , Zehao Chen\",\"doi\":\"10.1016/j.mineng.2025.109777\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Recovery of vanadium from spent selective catalytic reduction (SCR) catalysts is a critical challenge. This study explores hydrothermal acid leaching as a novel approach for extracting vanadium, analyzing key parameters such as leaching agent concentration, liquid–solid ratio, reaction temperature, and leaching time. Using the Box-Behnken design (BBD) and response surface method, the effects and interactions of these parameters on vanadium leaching efficiency were investigated.<!--> <!-->Mechanistically, sulfuric acid concentration governs vanadium dissolution into VO<sub>2</sub><sup>+</sup>/VO<sup>2+</sup>, while excessive acid or improper liquid–solid ratios induce titanium precipitation (TiOSO<sub>4</sub>/Ti(SO<sub>4</sub>)<sub>2</sub>) that encapsulates particles and captures vanadium ions.<!--> <!-->The results showed that leaching agent concentration optimization significantly enhanced vanadium recovery by suppressing these side reactions. The interaction between liquid–solid ratio and leaching time, as well as liquid–solid ratio and reaction temperature, significantly affected efficacy. Optimal conditions were determined as 2.13 mol · L<sup>−1</sup> H<sub>2</sub>SO<sub>4</sub>, 23.85 mL · g<sup>−1</sup>, 143 °C, and 89 min, achieving 99.76 % vanadium leaching. XRD and SEM-EDS revealed stable leaching slag structure, indicating its potential for subsequent metal recovery. This study highlights hydrothermal acid leaching as a sustainable method for vanadium recovery, contributing to resource conservation and waste reduction.</div></div>\",\"PeriodicalId\":18594,\"journal\":{\"name\":\"Minerals Engineering\",\"volume\":\"234 \",\"pages\":\"Article 109777\"},\"PeriodicalIF\":5.0000,\"publicationDate\":\"2025-09-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Minerals Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0892687525006053\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Minerals Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0892687525006053","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Hydrothermal acid leaching process with ultra-high efficiency for vanadium from spent catalyst
Recovery of vanadium from spent selective catalytic reduction (SCR) catalysts is a critical challenge. This study explores hydrothermal acid leaching as a novel approach for extracting vanadium, analyzing key parameters such as leaching agent concentration, liquid–solid ratio, reaction temperature, and leaching time. Using the Box-Behnken design (BBD) and response surface method, the effects and interactions of these parameters on vanadium leaching efficiency were investigated. Mechanistically, sulfuric acid concentration governs vanadium dissolution into VO2+/VO2+, while excessive acid or improper liquid–solid ratios induce titanium precipitation (TiOSO4/Ti(SO4)2) that encapsulates particles and captures vanadium ions. The results showed that leaching agent concentration optimization significantly enhanced vanadium recovery by suppressing these side reactions. The interaction between liquid–solid ratio and leaching time, as well as liquid–solid ratio and reaction temperature, significantly affected efficacy. Optimal conditions were determined as 2.13 mol · L−1 H2SO4, 23.85 mL · g−1, 143 °C, and 89 min, achieving 99.76 % vanadium leaching. XRD and SEM-EDS revealed stable leaching slag structure, indicating its potential for subsequent metal recovery. This study highlights hydrothermal acid leaching as a sustainable method for vanadium recovery, contributing to resource conservation and waste reduction.
期刊介绍:
The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.