%0 Journal Article %1 Valeev2020 %A Valeev, D. %A Kunilova, I. %A Shoppert, A. %A Salazar-Concha, C. %A Kondratiev, A. %D 2020 %I Elsevier Ltd %J Journal of Cleaner Production %K Aluminum Chloride Chlorine Coagulation; Coal Coal-fired Coal; Different Extraction Extraction; Fly Fossil Health Hydrometallurgy; Industrial Kinetics; Leaching, Organization, Process Semiempirical Solid-to-liquid World ash; chloride; compounds; efficiencies; equation; fuel mechanisms; parameters; plant; plants; power ratio; solutions; treatment water %R 10.1016/j.jclepro.2020.123206 %T High-pressure HCl leaching of coal ash to extract Al into a chloride solution with further use as a coagulant for water treatment %U https://www.scopus.com/inward/record.uri?eid=2-s2.0-85088939334&doi=10.1016%2fj.jclepro.2020.123206&partnerID=40&md5=49fdc6aa388e237c4887f12f2337f10d %V 276 %X In the present paper a novel process of the coal ash treatment was developed and analyzed: a high-pressure autoclave HCl leaching of the coal bottom and fly ash from an Omsk coal-fired power plant. This process was applied to extract aluminum from the coal ash into a chloride solution, which can further be used as a coagulant for water treatment. The Al extraction efficiency in this process can reach over 90% at certain process parameters discussed in the present study. Kinetics of the leaching process were evaluated using different kinetic (e.g. shrinking core) models. A semi-empirical equation was proposed for description of the kinetics of the leaching process as a function of the HCl concentration, solid-to-liquid ratio and temperature. Different mechanisms of the leaching process were also discussed and proposed. Water treatment by the obtained Al-chloride showed good results compared to an industrial coagulant; the treated water parameters were within the limits recommended by the World Health Organization for drinkable water. © 2020 Elsevier Ltd

@article{Valeev2020, abbrev_source_title = {J. Clean. Prod.}, abstract = {In the present paper a novel process of the coal ash treatment was developed and analyzed: a high-pressure autoclave HCl leaching of the coal bottom and fly ash from an Omsk coal-fired power plant. This process was applied to extract aluminum from the coal ash into a chloride solution, which can further be used as a coagulant for water treatment. The Al extraction efficiency in this process can reach over 90% at certain process parameters discussed in the present study. Kinetics of the leaching process were evaluated using different kinetic (e.g. shrinking core) models. A semi-empirical equation was proposed for description of the kinetics of the leaching process as a function of the HCl concentration, solid-to-liquid ratio and temperature. Different mechanisms of the leaching process were also discussed and proposed. Water treatment by the obtained Al-chloride showed good results compared to an industrial coagulant; the treated water parameters were within the limits recommended by the World Health Organization for drinkable water. © 2020 Elsevier Ltd}, added-at = {2021-08-28T19:41:18.000+0200}, affiliation = {Laboratory of New Metallurgical Processes (#24), A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Science, Moscow, 119334, Russian Federation; Scientific Research Centre “Thermochemistry of Materials”, National University of Science & Technology (MISIS), Moscow, 119049, Russian Federation; Laboratory No. 4.2. Complex Processing of Non-traditional Mineral Materials, Research Institute of Comprehensive Exploitation of Mineral Resources-IPKON, Russian Academy of Sciences, Moscow, 111020, Russian Federation; Department of Non-ferrous Metals Metallurgy, Ural Federal University, Yekaterinburg, 620002, Russian Federation; Universidad Austral de Chile, Independencia 631, Valdivia, 5110566, Chile}, art_number = {123206}, author = {Valeev, D. and Kunilova, I. and Shoppert, A. and Salazar-Concha, C. and Kondratiev, A.}, author_keywords = {Aluminum extraction; Coagulant; Coal ash utilization; High-pressure acid leaching; Water treatment}, biburl = {https://www.bibsonomy.org/bibtex/264d4676549d129616999d74354d273ab/cristiansalazar}, coden = {JCROE}, correspondence_address1 = {Valeev, D.; Laboratory of New Metallurgical Processes (#24), Russian Federation; email: dmvaleev@yandex.ru}, document_type = {Article}, doi = {10.1016/j.jclepro.2020.123206}, funding_details = {Russian Science FoundationRussian Science Foundation, RSF, 18-79-00305}, funding_text 1 = {This work was financially supported by the Russian Science Foundation Project No. 18-79-00305 . The authors would like to appreciate the assists from The Center for Collective Use Testing Analytical Center of the JSC “Scientific-research institute of chemical technology” and personally to Natalya Ognevskaya for chemical analysis of solid and liquid samples.}, interhash = {4c91ae8aa45e09dcf25c4e5fcecb2d91}, intrahash = {64d4676549d129616999d74354d273ab}, issn = {09596526}, journal = {Journal of Cleaner Production}, keywords = {Aluminum Chloride Chlorine Coagulation; Coal Coal-fired Coal; Different Extraction Extraction; Fly Fossil Health Hydrometallurgy; Industrial Kinetics; Leaching, Organization, Process Semiempirical Solid-to-liquid World ash; chloride; compounds; efficiencies; equation; fuel mechanisms; parameters; plant; plants; power ratio; solutions; treatment water}, language = {English}, note = {cited By 7}, publisher = {Elsevier Ltd}, references = {Abdrakhimov, V.Z., Abdrakhimova, E.S., Phase structure of pottery on the basis of waste products of combustible slates, coal enrichment, oil extracting and ashes slag materials (2013) Bull. 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