The aim of this study is to evaluate the environmental impacts of recovery of valuable metals from the desulfurizing spent catalyst. Molybdenum, vanadium and nickel widely used in the area of catalysis. But the demand of these metals is full filled by industries. Every year, more than 18,000 tons spent catalysts are discarded. In most countries, spent catalyst is classified as a harmful waste. Thus, metal recovery from spent catalyst has been processed. The recovery process of molybdenum, vanadium and nickel from spent catalyst was mainly carried out wet process. However, this process are not suitable for economics and environmental aspects. Because environmental costs for removal of sulfur in the spent catalyst is high and huge amount of industrial wastewater occurs. Thus, it is necessary to develop a process which is efficient and does not cause pollution than the wet process. Thus, we have studied life cycle assessment about the dry process for the recovery of valuable metals.

I. 서 론
 II. 연구방법
  1. 목적정의
  2. 범위정의
  3. 가정 및 제한사항
  4. 할당
  5. 전과정 목록분석(Life Cycle Inventory Analysis)
 III. 연구결과
  1. 전과정영향평가 특성화 결과
  2. 전과정영향평가 정규화 결과
 IV. 결 론
 사 사
 References

• 이수선(한국교통대학교 신소재공학과/친환경 에너지 변환 저장소재 및 부품개발 연구센터) | Soo-Sun Lee
• 김영실(성신여자대학교 청정융합과학과) | Youngsil Kim
• 안중우(성신여자대학교 청정융합과학과) | Joong Woo Ahn Corresponding author