Ethylation of Benzene with Ethane over MFI Zeolite-Supported Pb Catalyst

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2024-11-13 DOI:10.1007/s10562-024-04862-0

Koshiro Nakamura, Sho Tanizaki, Kakeru Tsubokawa, Etsushi Tsuji, Satoshi Suganuma, Naonobu Katada

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Abstract

Conversion of a short alkane such as ethane into chemical feedstocks instead of alkene becomes important for efficient use of natural gas and refinery off-gas. Here direct ethylation of benzene with ethane into ethylbenzene was attempted. Preceding studies clarified catalytic activity of Pt-loaded MFI-type zeolite. In addition, for a similar reaction, i.e., methylation of benzene with methane, we previously found catalytic activity of Co/MFI. Based on these backgrounds, various metal elements supported by zeolites were investigated as catalysts for a reaction between ethane and benzene. Pt, Pb, Zn, Mo, Co, and Ga/MFI showed high activity for ethylation of benzene with ethane. Among them, Pb/MFI showed high reaction rate for formation of desired products (ethylbenzene, styrene and diethylbenzene), while the others brought side reactions, i.e., formation of C₃₋₅ aliphatic hydrocarbons, toluene, naphthalene, and its derivatives. Pb/MFI showed stable activity, while Pt, Zn, and Mo/MFI showed deactivation due to carbonaceous formed by the side reactions.

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在 MFI 沸石支撑的铅催化剂上进行苯与乙烷的乙化反应

将乙烷等短烷烃转化为化工原料而不是烯烃，对于有效利用天然气和炼油废气非常重要。在此，我们尝试将苯与乙烷直接乙化成乙苯。前期研究明确了铂负载 MFI 型沸石的催化活性。此外，对于类似的反应，即苯与甲烷的甲基化反应，我们之前也发现了 Co/MFI 的催化活性。基于这些背景，我们研究了由沸石支撑的各种金属元素作为乙烷与苯反应的催化剂。铂、铅、锌、钼、钴和镓/MFI 在苯与乙烷的乙化反应中表现出较高的活性。其中，Pb/MFI 在生成所需产物（乙苯、苯乙烯和二乙苯）方面表现出较高的反应速率，而其他物质则会带来副反应，即生成 C3-5 脂肪族碳氢化合物、甲苯、萘及其衍生物。Pb/MFI 显示出稳定的活性，而 Pt、Zn 和 Mo/MFI 则由于副反应形成的碳质而失活。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.