نوع مقاله : مقاله کامل پژوهشی

نویسنده

بخش شیمی، دانشکده علوم، دانشگاه شیراز، شیراز، فارس، ایران

چکیده

کاتالیست­ های بر پایه نیکل، در فرایندهای پالایشگاهی و پتروشیمی استفاده می‌شوند. این کاتالیست‌ها پس از چندین بار احیاء و استفاده مجدد، به‌صورت کاتالیست های مستعمل در طبیعت رها می‌شوند که این کار علاوه ‌بر مخاطرات زیست‌محیطی، از نظر اقتصادی هم؛ به دلیل وجود فلز با ارزش نیکل؛ توجیه اقصادی ندارد. عموماً برای استخراج نیکل، از روش‌های هیدرومتالورژی استفاده می‌شود که سخت و گران هستند. باتوجه ‌به کمبود قابل‌توجه معادن کانی نیکل، استفاده از این منابع ثانویه کاملاً حائز اهمیت است. در این پژوهش، امکان بازیابی نیکل از کاتالیست های مستعمل، مورد بررسی قرار گرفت. در ابتدا، این کاتالیست‌ها کک ­زدایی شدند و سپس تأثیر سه اسید مختلف در فروشویی نیکل، مورد مطالعه قرار گرفت. پارامترهای مختلف، از قبیل دما، سرعت هم­زدن، نسبت محلول به جامد، اندازه ذرات و غلظت اسید، مورد بررسی قرار گرفتند. پس از فروشویی کامل نیکل، خالص‌سازی نیکل به‌صورت رسوب‌دهی گزینش ­پذیر نیکل هیدروکسید انجام شد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Optimization Study of Nickel Leaching from Used Catalysts and Investigation of Nickel Separation by Precipitation

نویسنده [English]

  • Hadi Salari

Department of Chemistry, School of Science, Shiraz University, Shiraz, Fars, Iran

چکیده [English]

Nickel-based catalysts are used in refining and petrochemical processes. After being regenerated and reused several times, these catalysts are released as used catalysts in nature, which, in addition to environmental risks, are not economically viable due to the presence of the precious metal nickel. Hydrometallurgical methods are commonly used to extract nickel, which is difficult and expensive. Due to the significant shortage of nickel mines, the use of these secondary resources is quite important. In this study, the possibility of nickel recovery from used catalysts has been investigated. Initially, the cokes were removed, and then the effects of three different acids on nickel leaching were investigated. Various parameters such as temperature, mixing speed, liquid to solid ratio, particle size, and acid concentration were investigated. After the complete leaching of nickel, nickel purification was performed by selective nickel hydroxide precipitation.

کلیدواژه‌ها [English]

  • Catalysts
  • Ni leaching
  • optimization
  1. Farhadi, S., Roostaei-Zaniyani, Z., "Preparation and characterization of NiO nanoparticles from thermal decomposition of the [Ni(en)3](NO3)2 complex: A facile and low-temperature route", Polyhedron, Vol. 30, (2011), 971-975. https://doi.org/10.1016/j.poly.2010.12.044
  2. Nemade, K., Waghuley, S., "Synthesis of MgO nanoparticles by solvent mixed spray pyrolysis technique for optical investigation", International Journal of Metals, Vol. 2014, (2014). https://doi.org/10.1155/2014/389416
  3. Sriharan, N., Senthil, T., Kang, M., Ganesan, N., "Rutile TiO2 nanorod arrays incorporated with α-alumina for high efficiency dye sensitized solar cells", Applied Physics A, Vol. 125, (2019), 118. https://doi.org/10.1007/s00339-019-2407-1
  4. Njau, K. N., Janssen, L. J. J., "Electrochemical reduction of nickel ions from dilute solutions", Journal of Applied Electrochemistry, Vol. 25, (1995), 982-986. https://doi.org/10.1007/BF00241595
  5. Kim, J., Kim, H. S., Bae, S., "Parametric study for enhanced performance of Cu and Ni electrowinning", Membrane Water Treatment, Vol. 10, No. 3, (2019), 201-206. http://dx.doi.org/10.12989/mwt.2019.10.3.201
  6. Bakhshi, M. H., Zakeri, A., "Electrowinning of nickel from dilute sulfate solution", Journal of Advanced Materials in Engineering, Vol. 36, No. 4, (2018), 89-103. https://doi.org/10.29252/jame.36.4.89
  7. Tanong, K., Tran, L. H., Mercier, G., Blais, J. F., "Recovery of Zn(II), Mn(II), Cd(II) and Ni(II) from the unsorted spent batteries using solvent extraction, electrodeposition and precipitation methods", Journal of Cleaner Production, Vol. 148, (2017), 233-244. https://doi.org/10.1016/j.jclepro.2017.01.158
  8. Awual, M. R., Hasan, M. M., Iqbal, J., Islam, M. A., Islam, A., Khandaker, S., Asiri, A. M., Rahman, M. M., "Ligand based sustainable composite material for sensitive nickel (II) capturing in aqueous media", Journal of Environmental Chemical Engineering, Vol. 8, (2020), 103591. https://doi.org/10.1016/j.jece.2019.103591
  9. Rath, M., Behera, L. P., Dash, B., Sheik, A. R., Sanjay, K., "Recovery of dimethylglyoxime (DMG) from Ni-DMG complexes", Hydrometallurgy, Vol. 176, (2018), 229-234. https://doi.org/10.1016/j.hydromet.2018.01.014
  10. Li, T., Xiao, K., Yang, B., Peng, G., Liu, F., Tao, L., Chen, S., Wei, H., Yu, G., Deng, S., "Recovery of Ni (II) from real electroplating wastewater using fixed-bed resin adsorption and subsequent electrodeposition", Frontiers of Environmental Science Engineering, Vol. 13, (2019), 91. https://doi.org/10.1007/s11783-019-1175-7
  11. Padh, B., Rout, P. C., Mishra, G. K., Suresh, K. R., Reddy, B. R., "Recovery of nickel and molybdate from ammoniacal leach liquors of spent HDS catalysts using chelating ion exchange resin", Hydrometallurgy, Vol. 184, (2019), 88-94. https://doi.org/10.1016/j.hydromet.2019.01.001
  12. Fila, D., Hubicki, Z., Kołodyńska, D., "Recovery of metals from waste nickel-metal hydride batteries using multifunctional diphonix resin", Adsorption, Vol. 25, (2019), 367-382. https://doi.org/10.1007/s10450-019-00013-9
  13. Junior, A. B. B., Dreisinger, D. B., Espinosa, D. C. R., "A review of nickel, copper, and cobalt recovery by cchelating ion exchange resins from mining processes and mining tailings", Mining Metallurgy & Exploration, Vol. 36, No. 1, (2019), 199-213. https://doi.org/10.1007/s42461-018-0016-8
  14. Perez, I. D., Correa, M. M. J., Tenório, J. A. S., Espinosa, D. C. R., "Effect of the pH on the recovery of Al+3, Co+2, Cr+3, Cu+2, Fe+3, Mg+2, Mn+2, Ni+2 and Zn+2 by purolite S950", Energy Technology, The Minerals, Metals & Materials Series, Sun, Z. et al. Eds., Springer, Cham, (2018), 385-393. https://doi.org/10.1007/978-3-319-72362-4_34
  15. Bhattacharya, L., Elzinga, E. J., "A comparison of the solubility products of layered Me(II)–Al(III) hydroxides based on sorption studies with Ni(II), Zn(II), Co(II), Fe(II), and Mn(II)", Soil Systems, Vol. 2, No. 2, (2018), 20. https://doi.org/10.3390/soilsystems2020020