Supported Ni-W Bimetallic Catalysts for Hydrogenation of Poly-Alpha-Olefins Synthetic Base Oil

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2024-07-02 DOI:10.1007/s10562-024-04755-2

Lishan Zheng, Sitan Wang, Shifeng Lou, Kande Liu, Xuan Meng, Naiwang Liu, Li Shi

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Abstract

A series of Ni-W bimetallic catalysts were prepared by Ni₂O₃ and WO₃ on porous materials and used in a fixed bed reactor for the hydrogenation of poly alpha-olefin base oil synthesis. The catalysts were characterized by N₂ adsorption–desorption, XRD, H₂-TPR, H₂-TPD, XPS, TEM and ICP-OES to investigate the catalytic activity and explore the possible deactivation mechanism. Under the optimal reaction conditions of 250℃, 4 MPa, LHSV = 3 h⁻¹ and H₂: PAO = 200, the Ni5W1/Clay catalyst with 5% nickel and 1% tungsten loading can make the hydrogenation conversion rate as high as 100%, and the catalyst deactivation is not obvious within 8 h. The addition of W led to the reduction of the metal particle size as well as the formation of more dispersed active sites, thus improve its catalytic activity.

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用于聚α-烯烃合成基础油加氢的负载型 Ni-W 双金属催化剂

利用多孔材料上的 Ni2O3 和 WO3 制备了一系列 Ni-W 双金属催化剂，并将其用于固定床反应器中进行聚α-烯烃基础油合成的加氢反应。通过N2吸附-解吸、XRD、H2-TPR、H2-TPD、XPS、TEM和ICP-OES对催化剂进行了表征，研究了催化活性并探讨了可能的失活机理。在250℃、4 MPa、LHSV = 3 h-1、H2: PAO = 200的最佳反应条件下，镍含量为5%、钨含量为1%的Ni5W1/Clay催化剂的加氢转化率高达100%，且8 h内催化剂失活不明显。

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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.