催化剂结构-活性关系在提高正丁烷到顺丁烯二酸酐的选择性氧化产率中的作用

IF 4.2 3区 化学 Q2 CHEMISTRY, PHYSICAL
Muhammad Faizan , Erum Aamir , Tiong Sieh Kiong , Hua Song
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引用次数: 0

摘要

钒磷氧化物(VPO)催化剂的合成是为了利用正丁烷等较轻的烷烃,通过选择性氧化工艺生产马来酸酐(MA)。与生产马来酸酐的苯氧化工艺相比,这种工艺具有更高的选择性、更环保、成本更低,因此受到全球的广泛关注。在此,我们首次将二维MXene Ti3C2(Mx)引入到VPO合成中,并通过溶热法和球磨法制备了Ti3C2@VPO(MXene@VPO;Mx@VPO)纳米复合材料,作为正丁烷选择性氧化进化的促进剂和抑制剂,其比例为1-5 wt%。其中,基于溶热法的促进催化剂(5% Mx@VPO)与未促进催化剂相比,表现出较大的 MA 选择性(高达 11%)。同时,它将降低 COx 选择性(CO2 和 CO)。更重要的是,CO :CO2 比率从 2.01 降至 1.5,这对环境和化工厂都是有益的。通过 BET、XPS、SEM、TEM、XRD、FT-IR、NH3-TPD、H2-TPR、EDS、EPR、拉曼和 TG/DTA 等各种表征技术,我们证实了 MXene 在 VPO 催化中作为结构引导剂和电子促进剂的作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Role of the catalyst structure–activity relationship in enhancing the selective oxidation yield of n-butane to maleic anhydride†

Role of the catalyst structure–activity relationship in enhancing the selective oxidation yield of n-butane to maleic anhydride†

Role of the catalyst structure–activity relationship in enhancing the selective oxidation yield of n-butane to maleic anhydride†

Vanadium phosphorus oxide (VPO) catalysts are synthesized for utilization of lighter alkanes such as n-butane to produce maleic anhydride (MA) by a selective oxidation process. Such a process has received huge global attention because of greater selectivity, eco-friendliness and being a less-expensive process as compared to the benzene oxidation process for the production of MA. Herein, we introduced for the first time 2-D MXene Ti3C2 (Mx) into VPO synthesis and prepared Ti3C2@VPO (MXene@VPO; Mx@VPO) nanocomposites via solvothermal and ball milling processes as a promoter and supporter at different (1–5) wt% for the evolution of n-butane selective oxidation. Among them, the solvothermal based promoted catalyst (5% Mx@VPO) exhibited large MA selectivity (up to 11%) as compared to the unpromoted catalyst. Simultaneously, it will decrease the COx selectivity (CO2 and CO). More importantly, the CO : CO2 ratio is reduced up to 1.5 from 2.01, which is beneficial for the environment and chemical plants. From various characterization techniques such as BET, XPS, SEM, TEM, XRD, FT-IR, NH3-TPD, H2-TPR, EDS, EPR, Raman, and TG/DTA we confirmed the role of MXene as a structure directing agent and electron promoting agent in VPO catalysis.

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来源期刊
Catalysis Science & Technology
Catalysis Science & Technology CHEMISTRY, PHYSICAL-
CiteScore
8.70
自引率
6.00%
发文量
587
审稿时长
1.5 months
期刊介绍: A multidisciplinary journal focusing on cutting edge research across all fundamental science and technological aspects of catalysis. Editor-in-chief: Bert Weckhuysen Impact factor: 5.0 Time to first decision (peer reviewed only): 31 days
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