Influence of Si/Al molar ratio on the hydrogenation, isomerization and ring opening of naphthalene over silica-alumina supported Ni2P catalyst. (1st August 2018)

• Record Type: Journal Article
• Authors: Cui, Sha; Wang, Genggeng; Yang, Ying; Liu, Baijun
• Is Part Of: Fuel. Volume 225(2018)
• Page Start: 10
• Page End: 17
• Publication Date: 2018-08-01
• Subjects: Ni2P -- Si/Al molar ratio -- Naphthalene -- Hydrogenation -- Isomerization -- Ring opening; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2018.03.130
• Languages: English
• ISSNs: 0016-2361

Abstract

Abstract: Ni2 P catalysts supported on amorphous silica-alumina (ASA) with various Si/Al molar ratios (n) of ∞, 3.40, 1.28, 0.57, 0.21, 0.10 and 0, were prepared using a co-impregnation method followed by temperature-programmed reduction. The resultant Ni2 P/ASA-n catalysts were characterized by means of X-ray diffraction (XRD), N2 adsorption and desorption, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), temperature-programmed ammonia desorption (NH3 -TPD) and FTIR spectroscopy of adsorbed pyridine (Py-IR). The catalytic properties were tested towards naphthalene hydrogenation, isomerization and ring opening in a fixed bed reactor under the following reaction conditions of P = 4 MPa, LHSV = 3 h −1, H2 /oil = 600 volume ratio and T = 360 °C. It is found that the superior naphthalene hydrogenation ability was obtained over the Ni2 P/ASA-0.57 catalyst, while higher isomerization and ring opening activity were achieved using Ni2 P/ASA-0.21 as the catalyst. It is concluded that the high naphthalene hydrogenation capacity is relevant to the small Ni2 P particle size and the isomerization and ring opening activity mainly depends on the acid amount of catalyst.