Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Recovery of the Vanadium and Tungsten from Spent SCR Catalyst Leach Solutions by Hydrometallurgical Methods

SCR 폐촉매 침출액으로부터 습식제련법에 의한 바나듐, 텅스텐의 회수

  • Choi, In-Hyeok (R & D Center, HANNAE For T (Metal Recycling Company)) ;
  • Moon, Gyeonghye (R & D Center, HANNAE For T (Metal Recycling Company)) ;
  • 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)) ;
  • Jyothi, Rajesh Kumar (Convergence Research Center for Development of Mineral Resources (DMR), Korea Institute of Geoscience and Mineral Resources (KIGAM))
  • Received : 2019.11.12
  • Accepted : 2020.02.17
  • Published : 2020.04.30
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Abstract

In new millennium, wide-reaching demands for selective catalytic reduction (SCR) catalyst have been increased gradually in new millennium. SCR catalyst can prevent the NOx emission to protect the environment. In SCR catalyst the main composition of the catalyst is typically TiO2 (70~80%), WO3 (7~10%), V2O5 (~1%) and others. When the SCR catalysts are used up and disposed to landfills, it is problematic that those should exist in the landfill site permanently due to their extremely low degradability. A new advanced technology needs to be developed primarily to protect environment and then recover the valuable metals. Hydrometallurgical techniques such as leaching and liquid-liquid extraction was designed and developed for the spent SCR catalyst processing. In a first stage, V and W selectively leached from spent SCR catalyst, then both the metals were processed by liquid-liquid extraction process. Various commercial extractants such as D2EHPA, PC 88A, TBP, Cyanex 272, Aliquat 336 were tested for selective extraction of title metals. Scrubbing and stripping studies were tested and optimized for vanadium and tungsten extraction and possible separation. 3rd phase studies were optimized by using iso-decanol reagent.

2000년대에 접어들면서 선택적 촉매 환원(SCR) 촉매에 대한 광범위한 수요가 점차 증가하고 있다. SCR 촉매는 환경보호를 위해 질소산화물(NOx)의 배출 방지에 사용 된다. 일반적으로 SCR 촉매의 주성분은 TiO2(70~80 %), WO3(7~10 %), V2O5(~1 %) 등으로 구성되어있다. SCR 폐촉매는 대개 매립되어 폐기 되는데, 분해도가 극히 낮아 매립지에 영구적으로 남아있게 된다는 문제점을 가지고 있다. 따라서 환경을 보호하고 페촉매에 함유되어 있는 유가금속의 회수를 위하여 새로운 첨단기술의 개발이 필요하다. 이러한 SCR 폐촉매의 처리를 위해 침출 및 액-액 추출과 같은 습식제련법이 설계되고 개발되었다. 첫 번째 단계에서 SCR 폐촉매로부터 바나듐과 텅스텐을 선택적으로 침출한 후, 액-액 추출 공정에 의해 처리되었다. 바나듐과 텅스텐의 선택적 추출을 위해 D2EHPA, PC 88A, TBP, Cyanex 272, Aliquat 336과 같은 다양한 상용 용매추출제를 이용한 실험을 수행하였다. 바나듐과 텅스텐의 추출 및 분리를 위해 세정(scrubbing) 및 탈거(stripping) 연구가 수행되고 최적화 되었다. 3상의 생성을 억제하기 위해 iso-decanol 시약을 사용하여 최적화 하였다.

Keywords

References

  1. Hye-Rim Kim, Jin-Young Lee, Joon-Soo Kim, 2012: Leaching of vanadium and tungsten from spent SCR catalyst for DeNOX by soda roasting and water leaching method, J. of Korean Inst. of Resources Recycling, 21(6), pp.65-73. https://doi.org/10.7844/kirr.2012.21.6.65
  2. Byoungin Kim, Suyun Kim, Jaeryeong Lee, 2018: Water leaching of tungsten and vanadium through mechno-chemical reaction of their oxides and alkali compounds, J. of Korean Inst. of Resources Recycling, 27(4), pp.57-64. https://doi.org/10.7844/KIRR.2018.27.4.57
  3. Gyeonghye Moon, In-Hyeok Choi, Kyungho Park, et al., 2017: Separation of tungsten and vanadium from alkaline solution with adding $CaCl_2$, J. of Korean Inst. of Resources Recycling, 26(4), pp.42-49. https://doi.org/10.7844/kirr.2017.26.4.42
  4. Hyo Sook Lee, Young Soon Oh, Woo Cheul Lee, 2001: A study on the recovery of zinc ion from metal-plating wastewater by using spent catalyst, J. of Korean Inst. of Resources Recycling, 10(3), pp.23-28.
  5. Debabrata Pradhan, Dong-Jin Kim, Seung-Bai Baik, et al., 2011: Extraction of valuable metals from spent desulfurizing catalyst, J. of Korean Inst. of Resources Recycling, 20(3), pp.48-54. https://doi.org/10.7844/kirr.2011.20.3.048
  6. Min Seuk Kim, Byung-su Kim, Eun-young Kim, et al., 2011: Recovery of platinum group metas from the leach solution of spent automative catalysts by cementation, J. of Korean Inst. of Resources Recycling, 20(4), pp.36-45. https://doi.org/10.7844/kirr.2011.20.4.036
  7. Jong-Hwa Kim, Jong-Gyu Yang, Sung-Sik Lee, 1995: Recovery of valuable metals from the desulfurizing spent catalyst used in domestic petrochemical industry, J. of Korean Inst. of Resources Recycling, 4(3), pp.2-9.
  8. Mi-Ae Kim, Jae-chun Lee, Chi-Kwon Kim, et al., 2006: Solvent extraction of platinum group metals from the leach liquor of spent automotive catalyst, J. of Korean Inst. of Resources Recycling, 15(5), pp.3-10.
  9. Jong Hwa Kim, Myung Gyo Seo, Jong Gyu Yang, et al., 1998: Recovery of molybdenum from the desulfurizing spent catalyst, J. of Korean Inst. of Resources Recycling, 7(2), pp.9-15.
  10. Jae-chun Lee, Jin-ki Jeong, Min-Seuk Kim, et al., 2004: Recovery of platinum group metals from spent automotive catalysts by hydrochloric acid leaching, J. of Korean Inst. of Resources Recycling, 13(5), pp.28-36.
  11. Hyun-Sep Park, 2011: A study on recovery of platinum group metals (PGMs) from spent automobile catalyst by melting technology, J. of Korean Inst. of Resources Recycling, 20(2), pp.74-81. https://doi.org/10.7844/kirr.2011.20.2.074
  12. Wan-tae Kim, Hyung-seok Kim, Sung-back Cho, et al., 2008: Effect of attrition scrubbing on the recovery of platinum group metals from spent automobile catalytic converters, J. of Korean Inst. of Resources Recycling, 17(5), pp.28-36.
  13. In-Hyeok Choi, Gyeonghye Moon, Jin-Young Lee, et al., 2019: Alkali fusion using sodium carbonate for extraction of vanadium and tungsten for the preparation of synthetic sodium titanate from spent SCR catalyst, Scientific Reports, 9(12316), pp.1-8 (DOI: 10.1038/s41598-019-48767).
  14. In-Hyeok Choi, Gyeonghye Moon, Jin-Young Lee, et al., 2018: Extraction of tungsten and vanadium from spent SCR catalyst for stationary application by pressure leaching process, Journal of Cleaner Production, 197(1), pp.163-169. https://doi.org/10.1016/j.jclepro.2018.06.196
  15. In-Hyeok Choi, Gyeonghye Moon, Jin-Young Lee, et al., 2018: Hydrometallurgical processing of spent SCR catalyst for recovery of tungsten, Hydrometallurgy, 178, pp.137-145. https://doi.org/10.1016/j.hydromet.2018.04.011
  16. In-Hyeok Choi, Gyeonghye Moon, Jin-Young Lee, et al., 2018: 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