Uses of H2 and CO2 gases in hydrometallurgical processes: Potential towards sustainable pretreatment, metal production and carbon neutrality

IF 4.8 2区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Hydrometallurgy Pub Date : 2025-03-11 DOI:10.1016/j.hydromet.2025.106468

Jae-chun Lee , Kurniawan Kurniawan , Yong Jae Suh , Banshi Dhar Pandey

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Abstract

Hydrometallurgical practices represent a vital area of focus within the metallurgical sector, and it is critical that these practices are carried out in an environmentally friendly manner in order to promote sustainability and responsible processing. One promising approach is the use of hydrogen gas (H₂), known for its ‘green’ properties, along with the pollutant carbon dioxide (CO₂), at various stages within the unit operations relevant to hydrometallurgical processes. This review provides a detailed overview of the utilization of H₂ and CO₂ gases, encompassing key stages including pretreatment, leaching, and metal recovery. Theoretical underpinnings are also provided for each stage, along with an overview of cutting-edge approaches such as application of supercritical CO₂. Challenges and future directions associated with H₂ and CO₂ utilization are also discussed. This review serves an important step towards advancing sustainable hydrometallurgical processes promoting carbon neutrality.

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来源期刊

Hydrometallurgy 工程技术-冶金工程

CiteScore

9.50

自引率

6.40%

发文量

144

审稿时长

3.4 months

期刊介绍： Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures; separation of solids from leach liquors; removal of impurities and recovery of metal values by precipitation, ion exchange, solvent extraction, gaseous reduction, cementation, electro-winning and electro-refining; pre-treatment of ores by roasting or chemical treatments such as halogenation or reduction; recycling of reagents and treatment of effluents.