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In-situ recovery of Pd from spent automotive catalysts: Preparation of high-value Pd/AC by vacuum vaporization-deposition.

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Τίτλος: In-situ recovery of Pd from spent automotive catalysts: Preparation of high-value Pd/AC by vacuum vaporization-deposition.
Συγγραφείς: Xin Z; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China., Shen Y; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China., Zhang J; Shanghai JA Solar Technology Co., Ltd., Shanghai 200436, People's Republic of China., Zhu J; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China. Electronic address: zhuj228@mail.sysu.edu.cn., Li R; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China., Li C; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China., Sun L; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China., Ruan J; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China; School of Energy and Environment, Southeast University, 2 Southeast University Road, Nanjing 211189, People's Republic of China.
Πηγή: Waste management (New York, N.Y.) [Waste Manag] 2026 Oct 30; Vol. 226, pp. 115841. Date of Electronic Publication: 2026 Sep 07.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Pergamon Press Country of Publication: United States NLM ID: 9884362 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-2456 (Electronic) Linking ISSN: 0956053X NLM ISO Abbreviation: Waste Manag Subsets: MEDLINE
Imprint Name(s): Original Publication: New York : Pergamon Press, c1989-
Ιατρικοί όροι (MeSH): Palladium*/chemistry , Palladium*/isolation & purification , Recycling*/methods , Charcoal*/chemistry , Waste Management*/methods , Automobiles*, Catalysis ; Vacuum ; Adsorption ; Volatilization
Περίληψη: Recovering precious metals from spent automotive catalysts and realizing their high-value reuse is critical to ease resource shortages and advance sustainable industrial development. Conventional pyrometallurgical recovery consumes massive energy and generates secondary pollution; most existing techniques only extract Pd without exploring its subsequent high-value application. In this study, we developed an effective and green vacuum vaporization-deposition approach for the in-situ recovery and high-value utilization of palladium (Pd) from spent automotive catalysts. Under 1573 K and < 0.01 Pa, Pd was successfully transferred from spent automotive catalysts onto activated carbon (AC), enabling the preparation of a high-value Pd supported on activated carbon (Pd/AC) catalysts with a Pd loading of 61.42 mg/kg. During the process, no hazardous sulfur oxides such as SO2 were detected, and sulfur was predominantly released in the form of low-toxicity organosulfur compounds, effectively avoiding secondary environmental pollution caused by toxic sulfur oxide emissions. Based on theoretical adsorption simulations, the loading mechanism of Pd on AC is verified: Pd vaporized under the experimental conditions, was readily adsorbed by the defect sites of AC, and ultimately deposited on the AC surface following a vacancy defect adsorption pathway. The prepared Pd/AC exhibited uniformly dispersed Pd particles and demonstrated significantly enhanced hydrogen desorption ability and reduction performance. This work provides a novel approach for in-situ metal recovery and high-value reutilization of solid waste containing precious metals.
(Copyright © 2026 Elsevier Ltd. All rights reserved.)
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Contributed Indexing: Keywords: Activated carbon; Palladium recovery; Spent automotive catalysts; Vacuum vaporization-deposition
Substance Nomenclature: 5TWQ1V240M (Palladium)
16291-96-6 (Charcoal)
Entry Date(s): Date Created: 20260907 Date Completed: 20260917 Latest Revision: 20260917
Update Code: 20260918
DOI: 10.1016/j.wasman.2026.115841
PMID: 42704942
Βάση Δεδομένων: MEDLINE
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  Data: In-situ recovery of Pd from spent automotive catalysts: Preparation of high-value Pd/AC by vacuum vaporization-deposition.
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  Data: &lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Xin+Z%22&quot;&gt;Xin Z&lt;/searchLink&gt;; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People&#39;s Republic of China.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Shen+Y%22&quot;&gt;Shen Y&lt;/searchLink&gt;; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People&#39;s Republic of China.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Zhang+J%22&quot;&gt;Zhang J&lt;/searchLink&gt;; Shanghai JA Solar Technology Co., Ltd., Shanghai 200436, People&#39;s Republic of China.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Zhu+J%22&quot;&gt;Zhu J&lt;/searchLink&gt;; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People&#39;s Republic of China. Electronic address: zhuj228@mail.sysu.edu.cn.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Li+R%22&quot;&gt;Li R&lt;/searchLink&gt;; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People&#39;s Republic of China.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Li+C%22&quot;&gt;Li C&lt;/searchLink&gt;; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People&#39;s Republic of China.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Sun+L%22&quot;&gt;Sun L&lt;/searchLink&gt;; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People&#39;s Republic of China.&lt;br /&gt;&lt;searchLink fieldCode=&quot;AU&quot; term=&quot;%22Ruan+J%22&quot;&gt;Ruan J&lt;/searchLink&gt;; School of Environmental Science and Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, People&#39;s Republic of China; School of Energy and Environment, Southeast University, 2 Southeast University Road, Nanjing 211189, People&#39;s Republic of China.
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  Data: Recovering precious metals from spent automotive catalysts and realizing their high-value reuse is critical to ease resource shortages and advance sustainable industrial development. Conventional pyrometallurgical recovery consumes massive energy and generates secondary pollution; most existing techniques only extract Pd without exploring its subsequent high-value application. In this study, we developed an effective and green vacuum vaporization-deposition approach for the in-situ recovery and high-value utilization of palladium (Pd) from spent automotive catalysts. Under 1573&#160;K and&#160;&amp;lt;&#160;0.01&#160;Pa, Pd was successfully transferred from spent automotive catalysts onto activated carbon (AC), enabling the preparation of a high-value Pd supported on activated carbon (Pd/AC) catalysts with a Pd loading of 61.42&#160;mg/kg. During the process, no hazardous sulfur oxides such as SO&lt;subscript&gt;2&lt;/subscript&gt; were detected, and sulfur was predominantly released in the form of low-toxicity organosulfur compounds, effectively avoiding secondary environmental pollution caused by toxic sulfur oxide emissions. Based on theoretical adsorption simulations, the loading mechanism of Pd on AC is verified: Pd vaporized under the experimental conditions, was readily adsorbed by the defect sites of AC, and ultimately deposited on the AC surface following a vacancy defect adsorption pathway. The prepared Pd/AC exhibited uniformly dispersed Pd particles and demonstrated significantly enhanced hydrogen desorption ability and reduction performance. This work provides a novel approach for in-situ metal recovery and high-value reutilization of solid waste containing precious metals.&lt;br /&gt; (Copyright &#169; 2026 Elsevier Ltd. All rights reserved.)
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  Data: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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        Value: 10.1016/j.wasman.2026.115841
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        StartPage: 115841
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      – SubjectFull: Adsorption
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      – SubjectFull: Waste Management methods
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      – SubjectFull: Automobiles
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      – TitleFull: In-situ recovery of Pd from spent automotive catalysts: Preparation of high-value Pd/AC by vacuum vaporization-deposition.
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