자원리싸이클링 (Resources Recycling)

  • 제29권2호
  • /
  • Pages.55-61
  • /
  • 2020
  • /
  • 2765-3439(pISSN)
  • /
  • 2765-3447(eISSN)
한국자원리싸이클링학회 (The Korean Institute of Resources Recycling)
권호 표지
DOI QR코드

DOI QR Code

SCR 폐촉매 침출액으로부터 용매추출법에 의한 유가금속의 추출

Spent SCR Catalyst Leach Liquor Processed for Valuable Metals Extraction by Solvent Extraction Technique

  • Sola, Ana Belen Cueva (Convergence Research Center for Development of Mineral Resources (DMR), Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Jeon, Jong-Hyuk (Convergence Research Center for Development of Mineral Resources (DMR), Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Lee, Jin-Young (Convergence Research Center for Development of Mineral Resources (DMR), Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Parhi, Pankaj Kumar (Convergence Research Center for Development of Mineral Resources (DMR), Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Jyothi, Rajesh Kumar (Convergence Research Center for Development of Mineral Resources (DMR), Korea Institute of Geoscience and Mineral Resources (KIGAM))
  • 투고 : 2019.11.12
  • 심사 : 2020.02.17
  • 발행 : 2020.04.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

선택적 촉매 환원법(SCR)은 여러 산업에서 질소산화물 (NOx)에 의한 대기오염을 줄일 수 있는 매우 유망한 기술이다. SCR 촉매의 소비는 기술이 발전함에 따라 매년 증가하고 있지만, 촉매의 수명은 제한되어 있으며, 일반적으로 수명이 다해 활성이 떨어진 폐촉매는 재활용 되지 않고 매립되어 처리되고 있다. 현재 가장 널리 사용되는 촉매는 V2O5-WO3/TiO2로 구성되어 있으며, 약 5%wt의 V2O5와 7-10%wt의 WO3를 함유하고 있다. 본 연구는 2차 공급원으로부터 유용 금속을 회수할 수 있는 기술개발에 대한 전세계적인 관심과, 다양한 분야에서의 바나듐 및 텅스텐의 수요에 대한 안정적인 공급을 대비하기 위한 기술개발을 바탕으로 한다. 추출 시간, pH 의존도 및 추출 농도에 대한 연구는 희석제 exxol D80에 추출제로 Aliquat 336을 사용하여 수행되었다. 두 금속의 최적 추출을 위한 조건은 약산성(~5.0) 영역에서 0.5mol/L의 Aliquat 336을 함유한 유기상과 30분 동안 추출 반응을 수행해야 하는 것으로 확인되었다. 또한 counter-McCabe-Thiele 분석으로부터 99%의 바나듐을 제거하기 위해 1단의 단수가 필요하고, 텅스텐의 추출을 위해 2단의 단수가 필요하였으며, 향류추출공정(counter-current simulations) 방식을 통한 이론적 접근의 적합성을 증명하였다.

Selective catalytic reduction (SCR) has been a promising technology to reduce the air pollution caused by nitrogen oxides (NOx) in several industries. The consumption of SCR catalysts increases every year as technology evolves, however those have a limited lifespan and usually end up in landfills after they deactivate. Currently, the most widely used catalyst for and stationary applications is V2O5-WO3/TiO2 which can contain around 50% wt V2O5 and 7-10% wt of WO3. The vast uses for both vanadium and tungsten and the worldwide interest in recycling methods that allow for the extraction of metals from secondary sources represent the major motivation for this research. The extraction time, pH dependency, extraction concentration studies were carried out using Aliquat 336 in exxol D80 as the extractant. It was determined that to optimize the extraction of both metals 30min of contact time with an organic phase containing 0.5mol/L of Aliquat 336 are needed at a slightly acidic pH (~5.0). In addition, counter McCabe-Thiele studies allowed us to determine that one stage is necessary for the removal of 99% of vanadium while 2 stages are necessary for the extraction of tungsten and counter current simulations proved that the theoretical approach was correct.

키워드

참고문헌

  1. Brunner, P.H., 2011 : Urban mining a contribution to reindustrializing the city, Journal of Industrial Ecology, 15, pp.339-341. https://doi.org/10.1111/j.1530-9290.2011.00345.x
  2. Oh, J.-H., Kim, M.-S., Shin, H.-D., et al., 2007 : A study of the research trends and the material flow on the unrecycled materials in Korea - The current situation of recycling technology f or waste resources in Korea, Journal o f the Korean Institute of Resources Recycling, 16(2), pp.63-76.
  3. Kumar, A., Holuszko, M. and Espinosa, D.C.R., 2017 : E-waste: An overview on generation, collection, legislation and recycling practices, Resources, Conservation and Recycling, 122, pp.32-42. https://doi.org/10.1016/j.resconrec.2017.01.018
  4. Kim, J.-H., Seo, G.-M., Yang, J.-K., et al.,1998 : Recovery of molybdenum from the desulfurizing spent catalyst, Journal of the Korean Institute of Resources Recycling, 7(2), pp.9-15.
  5. Kim, M.-S., Kim, B.-S., Kim, E.-Y., et al., 2011 : Recovery of platinum group metals from the leach solution of spent automotive catalysts by cementation, Journal of the Korean Institute of Resources Recycling, 20(4), pp.36-45. https://doi.org/10.7844/kirr.2011.20.4.036
  6. Kim, J.-H. and Yang, J.-G., 1995 : Recovery of valuable metals from the desulfurizing spent catalyst used in domestic petrochemical industry, Journal of the Korean Institute of Resources Recycling, 4(3), pp.2-9.
  7. Kim, J.W., Lee, W.G., Hwang, I.S., et al., 2015 : Recovery of tungsten from spent selective catalytic reduction catalysts by pressure leaching, Journal of Industrial and Engineering Chemistry, 28, pp.73-77. https://doi.org/10.1016/j.jiec.2015.02.001
  8. Choi, I.H., Moon, G., Lee, J.Y., et al., 2018 : Extraction of tungsten and vanadium from spent selective catalytic reduction catalyst for stationary application by pressure leaching process, Journal of Cleaner Production, 197, pp. 163-169. https://doi.org/10.1016/j.jclepro.2018.06.196
  9. Jyothi, R.K., Moon, G., Kim, H.-R., et al., 2017 : Spent $V_2O_5-WO_3/TiO_2$ catalyst processing for valuable metals by soda roasting-water leaching, Hydrometallurgy, 175, pp.292-299. https://doi.org/10.1016/j.hydromet.2017.12.010
  10. Kim, H.-R., Lee, J.-Y. and Kim, J.-S., 2012 : Leaching of vanadium and tungsten from spent SCR catalysts for De-NOx by soda roasting and water leaching method, Journal of the Korean Institute of Resources Recycling, 21(6), pp.65-73. https://doi.org/10.7844/kirr.2012.21.6.65
  11. Huo, Y., Chang, Z., Li, W., et al., 2015 : Reuse and valorization of vanadium and tungsten from waste $V_2O_5-WO_3/TiO_2$ SCR catalyst, Waste and Biomass Valorization, 6, pp.159-165. https://doi.org/10.1007/s12649-014-9335-2
  12. Choi, I. H., Moon, G., Lee, J.Y., et al., 2018 : Hydrometal-lurgical processing of spent selective catalytic reduction (SCR) catalyst for recovery of tungsten, Hydrometallurgy, 178, pp.137-145. https://doi.org/10.1016/j.hydromet.2018.04.011
  13. Choi, I., 2018 : Study on the recovery of vanadium and tungsten from spent $V_2O_5-WO_3/TiO_2$ Catalyst, University of Science and Technology (UST), Resources Recycling PhD dissertation thesis.
  14. Kim, H.I., Moon, G., Choi, I., et al., 2018 : Hydrometallurgical process development for the extraction, separation and recovery of vanadium from spent desulfurization catalyst bio-leach liquors, Journal of Cleaner Production, 187, pp.449-458. https://doi.org/10.1016/j.jclepro.2018.03.247
  15. Wei, W., Reddy, D.H.K., Bediako, J.K., et al., 2016 : Aliquat-336-impregnated alginate capsule as a green sorbent for selective recovery of gold from metal mixtures, Chemical Engineering Journal, 289, pp.413-422. https://doi.org/10.1016/j.cej.2015.12.104
  16. Wei, W., Cho, C.W., Kim, S., et al., 2016 : Selective recovery of Au(III), Pt(IV), and Pd(II) from aqueous solutions by liquid-liquid extraction using ionic liquid Aliquat-336, Journal of Molecular Liquids, 216, pp.18-24. https://doi.org/10.1016/j.molliq.2016.01.016
  17. El-Nadi, Y.A., Awwad, N.S. and Nayl, A.A., 2009 : A comparative study of vanadium extraction by Aliquat-336 from acidic and alkaline media with application to spent catalyst, International Journal of Mineral Processing, 92, pp.115-120. https://doi.org/10.1016/j.minpro.2009.03.005
  18. Nguyen, T.H. and Lee, M.S., 2016 : A review on the separation of molybdenum, tungsten, and vanadium from leach liquors of diverse resources by solvent extraction, Geosystem Engineering, 19(5), pp.247-259. https://doi.org/10.1080/12269328.2016.1186577
  19. Nakamura, T., Nishihama, S. and Yoshizuka, K., 2009 : A novel extractant based on d-glucosamine for the extraction of molybdenum and tungsten, Solvent Extraction Research and Development, 16, pp.47-56.

피인용 문헌

  1. Separation of Uranium(VI) and Vanadium(V) from Sulfuric Acid Media by Amine Based Extractants through Liquid-liquid Extraction Technique vol.30, pp.4, 2021, https://doi.org/10.7844/kirr.2021.30.4.64