High-performance B2O3/SiO2-TiO2 catalyst for propane oxidation to olefins

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-05-07 DOI:10.1016/j.apcata.2025.120329

Xiaoyu Yan, Yuhan Sun, Xiaoqing Xu, Jiale Xu, Rui Huang, Renjie Ji, Chunyi Li

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引用次数: 0

Abstract

Conventional mixed metal oxide catalysts for oxidative dehydrogenation of propane (ODHP) often face challenges in balancing propane conversion and olefin selectivity. In contrast, boron-containing catalysts can achieve higher selectivity for olefins. In this study, B₂O₃/SiO₂-TiO₂ catalysts were prepared via mechanical mixing and calcination, demonstrating high activity in ODHP with propylene and ethylene as primary products. At 620 °C, propane conversion reached 60.8 %, with total olefin selectivity of 70.2 %. Unlike h-BN or BO_x/carrier catalysts, B₂O₃ was directly used as both feedstock and active component, eliminating the need for an induction period. The mixed SiO₂-TiO₂ carrier anchored boron species on the TiO₂ surface, reducing boron loss and enhancing stability compared to pure SiO₂-supported catalysts. These results highlight the potential of B₂O₃/SiO₂-TiO₂ for efficient propane oxidative dehydrogenation to olefins.

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丙烷氧化制烯烃的高性能B2O3/SiO2-TiO2催化剂

传统的丙烷氧化脱氢混合金属氧化物催化剂在平衡丙烷转化率和烯烃选择性方面面临挑战。相比之下，含硼催化剂对烯烃的选择性更高。在本研究中，通过机械混合和煅烧制备了B2O3/SiO2-TiO2催化剂，以丙烯和乙烯为主要产物，具有较高的ODHP活性。在620 ℃时，丙烷转化率达到60.8 %，总烯烃选择性为70.2 %。与h-BN或BOx/载体催化剂不同，B2O3直接用作原料和活性组分，无需诱导期。混合SiO2-TiO2载体将硼固定在TiO2表面，与纯sio2载体相比，减少了硼的损失，提高了催化剂的稳定性。这些结果突出了B2O3/SiO2-TiO2在丙烷氧化脱氢制烯烃方面的潜力。

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.