Influence of Partial Incineration and Optimized Acid Leaching on the Remanufacturing of Ni–Mo/γ–Al2O3 Catalysts

Na, Woo-Jin; Park, Ho-Ryong; Ryu, Su-Jin; Kim, Beom-Jun; Roh, Hyun-Seog; Park, Hea-Kyung

doi:10.3390/catal14110768

Open AccessArticle

Influence of Partial Incineration and Optimized Acid Leaching on the Remanufacturing of Ni–Mo/γ–Al₂O₃ Catalysts

by

Woo-Jin Na

^1,†,

Ho-Ryong Park

²,

Su-Jin Ryu

^2,†,

Beom-Jun Kim

²,

Hyun-Seog Roh

^2,*

and

Hea-Kyung Park

^1,*

¹

Department of Materials Science and Chemical Engineering, Hanseo University, 46 Hanseo 1-ro, Heami-myun, Seosan 31962, Chungnam, Republic of Korea

²

Department of Environmental and Energy Engineering, Yonsei University, 1 Yonseidae-gil, Wonju 26493, Gangwon, Republic of Korea

^*

Authors to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Catalysts 2024, 14(11), 768; https://doi.org/10.3390/catal14110768

Submission received: 27 September 2024 / Revised: 22 October 2024 / Accepted: 29 October 2024 / Published: 30 October 2024

(This article belongs to the Section Industrial Catalysis)

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Abstract

This study investigated the optimization of the remanufacturing process for spent Ni–Mo/γ-Al₂O₃ catalysts utilized in hydrodesulfurization (HDS) reactions. The proposed process encompasses essential steps, including oil washing, partial incineration, acid leaching, and complete incineration, aimed at restoring the physicochemical properties of the spent catalysts. The incorporation of partial incineration enhanced the removal of hydrocarbons and sulfur compounds, leading to notable recovery of surface area and pore volume. However, vanadium removal was insufficient with partial incineration alone, necessitating the use of an optimized acid-leaching step, where the leaching time was adjusted. The remanufactured catalysts demonstrated superior performance in HDS reactions compared to their fresh counterparts. The OPA(60)C catalyst, remanufactured through oil washing, partial incineration, 60 min of acid leaching, and complete incineration, exhibited the highest desulfurization efficiency. These findings highlight the critical role of impurity removal and the optimization of the acid-leaching duration in restoring catalyst activity. By enabling effective catalyst reuse, this process offers a sustainable and cost-effective solution for industrial applications.

Keywords: remanufacturing; catalytic activity recovery; partial incineration; acid leaching; Ni–Mo/γ-Al₂O₃ catalyst

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MDPI and ACS Style

Na, W.-J.; Park, H.-R.; Ryu, S.-J.; Kim, B.-J.; Roh, H.-S.; Park, H.-K. Influence of Partial Incineration and Optimized Acid Leaching on the Remanufacturing of Ni–Mo/γ–Al₂O₃ Catalysts. Catalysts 2024, 14, 768. https://doi.org/10.3390/catal14110768

AMA Style

Na W-J, Park H-R, Ryu S-J, Kim B-J, Roh H-S, Park H-K. Influence of Partial Incineration and Optimized Acid Leaching on the Remanufacturing of Ni–Mo/γ–Al₂O₃ Catalysts. Catalysts. 2024; 14(11):768. https://doi.org/10.3390/catal14110768

Chicago/Turabian Style

Na, Woo-Jin, Ho-Ryong Park, Su-Jin Ryu, Beom-Jun Kim, Hyun-Seog Roh, and Hea-Kyung Park. 2024. "Influence of Partial Incineration and Optimized Acid Leaching on the Remanufacturing of Ni–Mo/γ–Al₂O₃ Catalysts" Catalysts 14, no. 11: 768. https://doi.org/10.3390/catal14110768

APA Style

Na, W.-J., Park, H.-R., Ryu, S.-J., Kim, B.-J., Roh, H.-S., & Park, H.-K. (2024). Influence of Partial Incineration and Optimized Acid Leaching on the Remanufacturing of Ni–Mo/γ–Al₂O₃ Catalysts. Catalysts, 14(11), 768. https://doi.org/10.3390/catal14110768

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Influence of Partial Incineration and Optimized Acid Leaching on the Remanufacturing of Ni–Mo/γ–Al₂O₃ Catalysts

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