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Spent SCR Catalyst Processing for Recovery of Valuable Metals by Hydrometallurgical Routes
( Jungshin Kang ),( Jin-young Lee ),( Veronica Cristina Arellano ),( Ana Belen Cueva Sola ),( Rajesh Kumar Jyothi ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 ISSE 초록집 Vol.2019 No.-
Sustainability leads the society in developing stages. It mainly is subject to on society, environment and economy. East Asian countries such as Korea, Japan, Singapore etc having very limited natural resources of refractory metals; at the same time Korea manufacturing and supplying the electrical and electronic goods for global needs. In side Korean peninsula, the population density is very high ~1288 per square mile. It was very high when compared with North American countries such as USA (84/ sq. mi) and Canada (9/ sq. mi). The handling of the spent matrices will give two solutions; one is environmental protection the other one is solve the landfill problems. Recycling subject concern the waste minimization, environmental/economic incentives, energy considerations and industrial ecology as well as it will leads to new resources innovation as secondary source. In recent decades, worldwide demands for selective catalytic reduction (SCR) catalyst has been increased gradually due to reinforcing environmental regulatory for NO<sub>x</sub> emission from stationary and mobile applications. In an effort to develop a better SCR catalyst, it is considered that V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> catalyst is the most effective and widely employed to reduce NO<sub>x</sub> emissions. V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> catalyst having properties such as its high NOx conversion efficiency, durability from poisons and thermal, sulfur resistance, and wide operation temperature window has been considered to be the most commercial and excellent NO<sub>x</sub> conversion efficiency. The present experimental research study deals the leaching and separation of Ti, W and V from spent SCR catalyst by hydrometallurgical methods. Various experimental parameters studied and optimized for recovery of the valuable metals such as Ti, W and V.
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