Catalytic cracking of oleic acid to generate aviation kerosene using platinum–modified ZSM–5 nanosheets

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-07-22 DOI:10.1002/jctb.7714

Haoyu Liu, Jingye Ma, Hong Yuan, Xiang Shi

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引用次数: 0

Abstract

BACKGROUND

A series of Pt@NZSM–5 and Pt/NZSM–5 nanosheets having different Si/Al ratios were prepared via an in situ synthesis and impregnation method, respectively, using C₂₂H₄₅–N⁺(CH₃)₂–C₆H₁₂–N⁺(CH₃)₂–C₆H₁₃ (C_22–6–6) as the template agent. The oleic acid decarboxylation reaction was carried out using these materials under CO₂ atmosphere and the oleic acid cracking mechanism was inferred from the product distribution of the C8-C17 alkanes.

RESULTS

The Pt@NZSM–5 and Pt/NZSM–5 was found to comprise thinner nanosheets and exhibited strong metal–substrate interactions. Pt@NZSM–5 nanosheets with a Si/Al molar ratio of 100 had thicknesses of only 8–9 nm along with a mesopore/micropore capacity ratio of 2.7, an acid content of 11 cm³/g STP and a high Pt₀/PtO_x ratio.

CONCLUSION

The Pt@NZSM-5 and Pt/NZSM-5 nanosheets had an interconnected hierarchical system and a large number of metal active sites that facilitated the decarboxylation of oleic acid. The Pt@NZSM–5 nanosheets demonstrated excellent catalytic activity during the cracking of oleic acid under a CO₂ atmosphere, giving a yield of C8–C17 alkanes as high as 83.8% after 5 h at 320 °C. These Pt@NZSM–5 nanosheets also showed greater stability than the Pt/NZSM–5 specimens. © 2024 Society of Chemical Industry (SCI).

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使用铂改性 ZSM-5 纳米片催化裂解油酸生成航空煤油

背景以C22H45-N+(CH3)2-C6H12-N+(CH3)2-C6H13 (C22-6-6)为模板剂，通过原位合成和浸渍法分别制备了一系列具有不同Si/Al比的Pt@NZSM-5和Pt/NZSM-5纳米片。结果发现，Pt@NZSM-5 和 Pt/NZSM-5 纳米片更薄，金属与基底的相互作用更强。硅/铝摩尔比为 100 的 Pt@NZSM-5 纳米片厚度仅为 8-9 nm，中孔/微孔容量比为 2.7，酸含量为 11 cm3/g STP，Pt0/PtOx 比值较高。在二氧化碳气氛下裂解油酸时，Pt@NZSM-5 纳米片表现出卓越的催化活性，在 320 °C 下 5 小时后，C8-C17 烷烃的产率高达 83.8%。与 Pt/NZSM-5 试样相比，这些 Pt@NZSM-5 纳米片还表现出更高的稳定性。© 2024 化学工业学会（SCI）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.