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Published in Natan B. Vargaftik, Lev P. Filippov, Amin A. Tarzimanov, Evgenii E. Totskii, Yu. A. Gorshkov, Handbook of Thermal Conductivity of Liquids and Gases, 2020
Natan B. Vargaftik, Lev P. Filippov, Amin A. Tarzimanov, Evgenii E. Totskii, Yu. A. Gorshkov
Decahydro naphthalene (decalin) C10H18. The authors of [127, 321] give for the thermal conductivity of liquid decalin at 290 and 360 K values of 0.114 and 0.109 W/(m · K), respectively.
Kinetics of naphthalene catalytic hydrogenation under high temperature and high pressure
Published in Petroleum Science and Technology, 2020
Shiquan Bie, Hongbo Jiang, Wei Wang, Geping Shu, Xuwen Zhang, Hongxue Wang, Shansong Gao
Since the reaction of naphthalene to tetralin is very fast, the model parameters of this reaction can only reflect its size to some extent. Table 2 shows the pre-exponential factors and activation energies of each reaction, from which the reaction rate constants at 400 °C and 15 MPa can be obtained. The reaction rate constant of naphthalene to tetralin is larger than that of the other hydrogenation reactions, which indicates that the hydrogenation rate of the first-ring is greater than that of the second-ring in the naphthalene system. The hydrogenation reaction rate constant of tetralin to trans-decalin is larger than that of tetralin to cis-decalin, which indicates that the formation of trans-decalin is quicker than that of cis-decalin. Because the number of hydrogen molecules involved in the reaction of tetralin to decalin is more than that of naphthalene to tetralin, the effect of hydrogen pressure on the reaction rate of tetralin to decalin is more obvious than that of naphthalene to tetralin, and the increasing pressure is favorable for deep hydrogenation of naphthalene. Table 3 shows that the adsorption constant of naphthalene is the largest, and the adsorption constant decreases as the number of aromatic rings decreases, which is consistent with the adsorption mechanism of polycyclic aromatic hydrocarbons that the aromatic hydrocarbons with more aromatic rings will be easier to be adsorbed on the catalyst surface. In this reaction system, the adsorption capability of naphthalene is the strongest, and the adsorption capability of cis-decalin and trans-decalin are equivalent.
Hydrogen-donated thermal upgrading of Venezuela extra-heavy oil: identifying the role of hydrogen donor
Published in Petroleum Science and Technology, 2020
Qiang Chen, Menghui Yin, Lingling Zhang, He Liu, Zhihong Qin, Zongxian Wang
The addition of hydrogen donor during thermal processing of heavy oil has been recognized as an effective method to promote its processability, particularly in the case of extra-heavy oil (Kim et al. 2018; Wan et al. 2019). A variety of hydrogen donors have been used, including model compounds (such as tetralin, decalin, naphthalene, etc.), mixture of model compounds, and natural hydrogen donors (such as crude oil fractions, coal-derived streams, etc.) (Alemán-Vázquez et al. 2016; Hou et al. 2018; Kim et al. 2018; Chen et al. 2019). Hydrogen donation (i.e., hydrogen is transferred from the donor to the oil) is believed to be an important mechanism, although the exact processes of hydrogen transfer are still poorly understood (Alemán-Vázquez et al. 2016).
Effect of hydrophobically associating polymeric aluminum-polymer dual coagulant on coagulation of oily sewage from oilfields
Published in Petroleum Science and Technology, 2022
Huili Zhang, Min Li, Jinjun Deng, Hailin Yu, Yanbin Tong, Lingmin Wu, Liqun Sun, Hongsheng Liu
Molecular weight was measured by Brookhaven BI-200SM laser light scattering spectrometer. The molecular weight of PASS-C and PASSC-PD prepared in this experiment were measured by dynamic and static light scattering. First, use ultrapure water to prepare NaCl (0.5 mol/L) and filter with 0.2 μm water phase membrane. The coagulant to be tested was formulated into a 0.3 mg/mL solution with filtered NaCl and filtered with a 0.8 μm aqueous membrane. Then, adjust the sample parameters for dynamic and static light scattering as follows: the refractive indexes of solvent, quartz and decalin were 1.404, 1500, and 1.474, respectively. The setting range of the detection angle was 30°–100°, and the wavelength was 532 nm. Select Zimm mode for analysis.