STUDY ON HYDROFINING CATALYSTS FOR LOW-VISCOSITY POLY-α-OLEFINS DERIVED FROM FISCHER-TROPSCH SYNTHESIS

Abstract

Abstract: To enhance the product quality of polyalphaolefin synthetic oil (PAO) and reduce its bromine value, a series of PAO hydrofining catalysts with different Ni loadings were prepared using macroporous γ-Al₂O₃as the support.The intrinsic relationship between the catalyst's pore structure, phase composition, metal-support interactions, active site distributions and catalytic activity were systematically investigated.Results indicate that the CAT-3 catalyst (with mass fraction of Ni of 20%) exhibits an excellent pore structure, abundant active sites, and strong metal-support interactions.Under appropriate reaction conditions, the bromine index of the feedstock oil can be reduced from 17600 mgBr/(100 g) to 11.8 mgBr/(100 g), while the Saybolt color number of the hydrogenated product was improved to +30. The product specifications fully meet the requirements.

Key words: Fischer-Tropsch synthesis, polyalphaolefins, hydrofining, Ni-based catalyst

References

[1]Zhang Q, Kang J, Wang Y.Development of novel catalysts for Fischer–Tropsch synthesis: tuning the product selectivity[J].ChemCatChem, 2010, 2(9):1030-1058
[2]郝文月, 丁少军, 刘昶, 等.费托合成油加氢生产清洁交通运输燃料技术的工业应用[J].当代化工, 2022, 51(5):1236-1240
[3]李冰冰, 万会军, 任柱, 等.费托合成油品生产精细化学品加工技术研究进展[J].广州化工, 2020, 48(19):15-17
[4]刘东阳, 曹祖宾, 石薇薇, 等.费-托蜡裂解混合α-烯烃齐聚制备润滑油基础油[J].石油化工, 2019, 48(06):575-582
[5]谭家伦, 姜豪, 王丹, 等.种含氧化合物对固载型双金属α-烯烃聚合催化剂及合成性能的影响[J].石油学报石油加工, 2021, 37(3):486-497
[6]Kang G, Zhang F, Liu H, et al.Rapid separation and API grades identification of base oil in low viscosity gasoline engine oil SN 0W-16[J].ACS omega, 2024, 9(19):21270-21275
[7]Benda R, Bullen J, Plomer A.Synthetics basics: Polyalphaolefins—base fluids for high‐performance lubricants[J].Journal of Synthetic Lubrication, 1996, 13(1):41-57
[8]李鸿鹏, 于廷云, 陈平, 等.中粘度聚α-烯烃合成基础油Mo-Ni-P/γ-Al2O3加氢催化剂的研究[J].工业催化, 2006, (02):17-20
[9]李玉华, 关琦.国内外基础油生产技术现状及发展趋势[J].中国新技术新产品, 2015, (17):49-50
[10]韩嘉宝, 曹勃.润滑油加氢催化剂及工艺技术进展[J].石油炼制与化工, 2022, 53(04):17-23
[11]Kukushkin R G, Yeletsky P M.Ni-Based Catalysts: Synthesis and Applications Today[J].Catalysts, 2023, 13(6):968-
[12]胡晓丽, 孙利民, 马好文, 等.裂解汽油一段加氢镍基催化剂在国内大型乙烯的工业应用[J].现代化工, 2017, 37(05):162-165
[13]Bezemer G L, Bitter J H, Kuipers H P C E, et al.Cobalt Particle Size Effects in the Fischer?Tropsch Reaction Studied with Carbon Nanofiber Supported Catalysts[J].Journal of the American Chemical Society, 2006, 128(12):3956-3964
[14]Ivanez O, Miro i Rovira A, Blekkan E A.Impact of the support material on the phosphorus poisoning on Co-based catalysts for Fischer-Tropsch synthesis[J].Catalysis Today, 2024, 441:114866-
[15]胡天益, 马宏方, 钱炜鑫, 等.燃烧法制备、双助剂γ-甲烷化催化剂[J].天然气化工化学与化工, 2018, 43(06):6-10
[16]Bolder F H A.Fischer?Tropsch Wax Hydrogenation over a Sulfided Nickel-Molybdenum Catalyst[J].Energy & Fuels, 2007, 21(3):1396-1399
[17]Shams A, Sadjadi S, Duran J, et al.Effect of support hydrophobicity of halloysite‐based catalysts on the polyalphaolefin hydrofinishing performance[J].Applied Organometallic Chemistry, 2022, 36(7):e6719-
[18]李洪梅, 曹祖宾, 石薇薇, 等.混合α-烯烃聚合制备高黏度聚α-烯烃合成油[J].石油化工, 2019, 48(11):1127-1133
[19]Thommes M, Kaneko K, Neimark A V, et al.Physisorption of gases,with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)[J].Pure and applied chemistry, 2015, 87(9-10):1051-1069
[20]Hou Z, Yokota O, Tanaka T, et al.Investigation of CH4 reforming with CO2 on meso-porous Al2O3-supported Ni catalyst[J].Catalysis letters, 2003, 89(1):121-127
[21]Fu J, Sheng D, Lu X.Hydrogenation of levulinic acid over nickel catalysts supported on aluminum oxide to prepare γ-valerolactone[J].Catalysts, 2015, 6(1):6-
[22]Huang X, Yang W, Li Z, et al.Nickel Oxide Nanoparticles on KIT-6: An Efficient Catalyst in Methane Combustion[J].Processes, 2023, 11(4):1004-
[23]Mahlaba S V L.A study on the deactivation and reactivation of supported nickel hydrogenation catalysts[J].Applied Catalysis B: Environmental, 2018, 224:295-304
[24]He L, Ren Y, Yue B, et al.Tuning metal–support interactions on NiAl2O3 catalysts to improve catalytic activity and stability for dry reforming of methane[J].Processes, 2021, 9(4):706-
[25]Liu Q, Gao J, Zhang M, et al.Highly active and stable Niγ-Al2O3 catalysts selectively deposited with CeO2 for CO methanation[J].Rsc Advances, 2014, 4(31):16094-16103
[26]刘树英, 张毓武, 杨文.NiAl2O4材料的X射线光电子能谱分析[J].无机材料学, 1993, (04):499-502
[27]Zhang Q, Liao X, Liu S, et al.Tuning particle sizes and active sites of NiCeO2 catalysts and their influence on maleic anhydride hydrogenation[J].Nanomaterials, 2022, 12(13):2156-
[28]Thyssen V V, Nogueira F G E, Assaf E M.Study of the influence of nickel content and reaction temperature on glycerol steam reforming with NiLa2O3-SiO2 catalysts[J].Int J Res Eng Sci, 2017, 5(1):54-62
[29]Kaewmuang P, Thongtem T, Thongtem S, et al.Influence of calcination temperature on particle size and photocatalytic activity of nanosized NiO powder[J].Russian Journal of Physical Chemistry A, 2018, 92(9):1777-1781
[30]de la Cruz-Cruz J, Domínguez-Crespo M, Ramírez-Meneses E, et al.Data supporting the in situ synthesis by organometallic method of Vulcan supported PdNi nanostructures for hydrogen evolution reaction in alkaline solution[J].Data in Brief, 2022, 42:08256-