자원리싸이클링 (Resources Recycling)

  • 제30권3호
  • /
  • Pages.47-54
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  • 2021
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  • 2765-3439(pISSN)
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  • 2765-3447(eISSN)
한국자원리싸이클링학회 (The Korean Institute of Resources Recycling)
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도금폐촉매액내 팔라듐 재자원화에 따른 자원 및 온실가스 감축량 분석

Analysis of Resource and GHG Reduction by Recycling Palladium in Plated Spent Catalyst Solution

  • 신가영 (인하대학교 일반대학원 글로벌산업.환경융합전공) ;
  • 이성유 (인하대학교 일반대학원 글로벌산업.환경융합전공) ;
  • 강홍윤 (인하대학교 일반대학원 글로벌산업.환경융합전공)
  • Shin, Ka-Young (Program in Global Industrial & Environmental Technology Convergence, Graduate School, Inha University) ;
  • Lee, Seong-You (Program in Global Industrial & Environmental Technology Convergence, Graduate School, Inha University) ;
  • Kang, Hong-Yoon (Program in Global Industrial & Environmental Technology Convergence, Graduate School, Inha University)
  • 투고 : 2021.04.29
  • 심사 : 2021.06.07
  • 발행 : 2021.06.30
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초록

무전해 도금공정에서 사용되는 콜로이드 타입의 도금폐촉매액내 팔라듐은 회수하지 못하고 폐수로 방출되고 있었으나, 재자원화 기술을 적용하여 콜로이드 타입의 도금폐촉매액내 팔라듐을 회수하였다. 본 연구에서는 전과정평가기법을 이용하여 도금폐촉매액내 팔라듐을 재자원화 시와 폐기 시의 자원 소모량과 온실가스 배출량을 각각 산정한 후, 자원 및 온실가스 감축량을 분석하였다. 산정 결과, 팔라듐 1 kg 기준으로 폐기시 온실가스 배출량은 9.67E+03 kgCO2eq., 자원 소모량은 3.94E+01 kgSb-eq.로 나타났으며, 재자원화 시 온실가스 배출량은 1.96E+03 kgCO2eq., 자원 소모량은 1.54E+01 kgSb-eq.로 각각 나타났다. 온실가스 배출량과 자원 소모량에 미치는 주요 영향물질을 살펴보면, 폐기 시와 재자원화 시 온실가스 배출량에 미치는 주요 물질은 모두 CO2로 각각 91.42%, 98.37%였으며, 자원 소모량에 미치는 주요 물질은 모두 무연탄(hard coal)으로 40.63%, 60.73%로 나타났다. 한편, 팔라듐 1 kg을 재자원화함에 따른 온실가스 배출량은 8,967.17 kgCO2eq. 감축되었으며, 자원 소모량은 10.10 kgSb-eq. 감축되는 것으로 나타났다. 또한, 팔라듐 재자원화로 인한 팔라듐의 직접적인 천연자원 사용저감률은 50%로 나타났다.

Palladium present in colloidal-type plated spent catalyst solution that is used in electroless plating process has not been recovered but discharged as wastewater so far. Recyclig of paladium in colloidal-type plated spent catalyst solution is achieved with this study. This study presents the estimation of resource consumption and GHG emissions during the recycling and disposal of palladium in the plated spent catalyst solution using life cycle assessment. The reduction of resources and GHG are also estimated. Based on the palladium amount of 1 kg during disposal, the GHG emission amount was estimated to be 9.67E+03 kgCO2eq., and the amount of resource consumption was 3.94E+01 kgSb-eq. However, GHG emission was 1.96E+03 kgCO2eq., and the amount of resource consumption was 1.54E+01 kgSb-eq. during recycling. Considering the major substances affecting GHG emissions and amount of resource consumption, CO2 was found to significantly affect GHG emissions, accounting for 91.42% in disposal and 98.37% in recycling. The major substance affecting the amount of resource consumption was hard coal, which accounted for 40.63% in disposal and 60.73% in recycling. Upon recycling 1 kg palladium, 8,967.17 kgCO2eq. of greenhouse gas emission was reduced, while the resource consumption was reduced to 10.10 kg Sb-eq. In addition, the direct palladium resource reduction rate due to palladium recycling was 50%.

키워드

과제정보

본 논문은 2021년도 정부(산업통상자원부)의 재원으로 한국산업기술진흥원의 지원을 받아 수행된 연구(N0012787, 2021년 산업혁신인재성장지원사업)입니다.

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